掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.powtec.2021.02.072

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

J-GLOBAL

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

J-GLOBAL

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

J-GLOBAL

researchmap

記述言語：日本語  

J-GLOBAL

researchmap

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY  

Cobalt blue is one of the most chemically and thermally stable blue pigments. However, cobalt is scarce and expensive. To minimize the use of cobalt and reduce production costs and toxicity, cobalt blue core-shell pigments were synthesized by a solid-state method, which is cheaper than a liquid-phase reaction. Small cobalt hydroxide particles and large -alumina particles, in various ratios, were used as the starting materials. The dry mixed powders were calcined at 1200 degrees C for 2hours. Elemental mappings of the surfaces and cross sections of the synthesized particles showed that the cobalt blue had a core-shell structure. X-ray diffraction patterns showed that the synthesized cobalt blue consisted of an -alumina core and a cobalt aluminate shell. The color tone of the synthesized cobalt blue was evaluated from the lightness (L*) and chroma (C*) values. The color tone of the cobalt blue synthesized in this study was almost same as those of commercially available samples although the cobalt molar fraction was lower than the stoichiometric ratio (Co/(Co+Al)=0.33, Co/Al=0.5) which was calculated from the chemical reaction formula.

DOI： 10.1111/jace.16191

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apt.2018.10.018

Web of Science

researchmap

掲載種別：研究論文（学術雑誌）  

The color tone of pigments is affected by various factors such as crystal structure and particle size. These characteristics should be determined by synthesis condition. In this study, the influence of cobalt source on the color tone of cobalt blue pigment was investigated. Cobalt blue (CoAl2O4) was synthesized by solid-state reaction method. Co3O4 and Co(OH)2 with two different particle sizes were used as the cobalt source, and γ-Al2O3 was used as the aluminum source. The products were characterized by spectrophotometry, XRD, SEM, and TG/DTA. It was revealed that the chroma of the synthesized cobalt blue depends on the cobalt source. The cobalt blue synthesized using smaller size Co(OH)2 showed most vivid color. It was suggested that the number of the contact points between the starting materials increased with decreasing the particle size, leading to the progress of the reaction.

DOI： 10.4164/sptj.56.446

Scopus

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

Particle flowability can be improved by admixing particles smaller than the original particles (main particles). However, the mechanisms by which this technique improves flowability are not yet fully understood. In this study, we examined compressed packing in a particle bed, which is affected by particle flowability. To estimate the mechanism of improvement, we investigated the effects of the main particle diameter on the improvement of compressed packing fractions experimentally.
The main particles were 397 and 1460 nm in diameter and the admixed particles were 8, 21, 62, and 104 nm in diameter. The main and admixed particles were mixed in various mass ratios, and the corn-pressed packing fractions of the mixtures were measured. SEM images were used to analyze the coverage diameter and the surface coverage ratio of the admixed particles on the main particles. The main particle packing fraction was improved as the diameter ratio (=main particles/admixed particles) increased. This was explained by a linked rigid-3-bodies model with leverage. Furthermore, the actual surface coverage ratio at which the most improved packing fraction was obtained decreased with increasing main particle diameter. This was explained by the difference in the curvature of the main particle surface. (C) 2017 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

DOI： 10.1016/j.apt.2017.07.004

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4164/sptj.54.97

J-GLOBAL

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

One technique for improving particle flowability is the admixture of nano-particles to the main particles. However, the mechanisms by which this technique improves flowability are not yet fully understood. In this study we examined compressed packing, which is affected by particle flowability. In order to investigate the mechanism of improvement, discrete element method (DEM) simulation was used to investigate the effects of adhesion forces and rotations of admixed particles on packing fraction.
We conducted two types of calculations: (1) compressed packing behavior of a particle bed, and (2) particle behavior in a simple model of the relative motion of two of the main particles. The main and admixed particles were given diameters of 400 and 20 nm, respectively. The physical properties of the particles were set based on silica and glass materials. The Hamaker constant of the main particles was kept constant while that of the admixed particle was varied from 2 x 10(-27) to 1 x 10(-20) J. Simulations were also conducted both allowing and not allowing rotation of admixed particles.
In the packing behavior calculations, the results for the packing fraction of the main particles and the compression velocity exhibited peaks at a Hamaker constant of approximately 10(-23) J for the admixed particles under 43.8 Pa compression pressure, regardless of the degree of rotation of the admixed particles. This showed that rotation of the admixed particles was not the main reason for the improvement in main particle flowability, and this peak tendency was determined by the Hamaker constant of the admixed particles. In addition, an improvement in the particle flowability via different numbers of layers of admixed particles was explained using a linked rigid-3-bodies model. This implies that the improvement in the flowability is due to a decrease in the resistance of particle movement by changing the configuration to a linked rigid-3-bodies model. (C) 2016 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

DOI： 10.1016/j.apt.2016.07.021

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

A new apparatus was developed for the evaluation of particle adhesiveness. This apparatus uses shear stress that is induced by pulling a rod across a compressed particle bed. The tested samples were spherical silica particles with number based median diameters of 0.4 and 2.8μm. <br>When the height of the particle bed ≥ 17.0mm and the length of the rod in the bed ≥ 11.5mm, the shear stresses obtained by this apparatus were independent of either values of the bed height or the length of the rod. Using the values of stress, the inter-particle shear forces were calculated. The calculated forces increased with packing fraction and reached asymptotic values. The order of the asymptotic values agreed with that of the theoretical values of van der Waals force. This would be because frictional forces are based on adhesive forces in the real contact area （not the apparent contact area） of the 2 bodies. Thus, the new apparatus could be used to evaluate particle adhesiveness reflecting van der Waals force.

DOI： 10.4164/sptj.53.386

CiNii Article

CiNii Books

researchmap

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TAYLOR & FRANCIS INC  

Surface cleaning using high-speed air jet can be applied to cleaning of an object with concavo-convex shape. In such cases, the distance between the air jet nozzle and the surface becomes on the order of cm. An increase in the distance causes a decrease of the air velocity at the surface resulting in deterioration of the particle removal performance of the air jet. Therefore, a method to enhance removal efficiency is required. In this study, we investigated two methods for the enhancement of removal efficiency: one is to set a wire in the air flow and the other is to set two cylindrical rods. Although the wire set at the center of the jet flow deteriorates the removal efficiency, experimental results imply that the wire has a positive effect on the efficiency when it is set at a position where it does not interfere with the main flow of the jet. On the other hand, when two cylindrical rods are set at a theoretical periphery of the air jet, it shows clearly an enhancement in removal efficiency. This fact implies that the removal efficiency can be enhanced by controlling flow fluctuation by means of setting an obstacle.

DOI： 10.1080/02726351.2015.1060653

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apt.2015.01.014

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4164/sptj.51.629

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4164/sptj.51.635

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SOC CHEMICAL ENG JAPAN  

A new apparatus was developed to evaluate the flowability of particles with poor flow behavior. This apparatus uses the phenomenon that particles drain from a particle-bed as stress on the bed is gradually increased. Samples employed were coarse particles with good flow behavior ( 133, 158, 306 mu m) and fine particles with poor flow behavior (1.6, 4.5, 32.9 mu m). The drained angles of coarse particles obtained with the new apparatus agree with those obtained with a conventional apparatus. Hence, the new apparatus is applicable for coarse particles. On the other hand, the drained angles of the fine particles could not be measured by the conventional method, as particles did not drain from the container. However, with the new apparatus, a particle-bed of fine particles (<= 4.5 mu m) suddenly collapsed drained at a certain level of applied stress. From this stress value, the forces acting between particles in the bed were calculated, and these forces agreed with those obtained with a direct shear tester. Thus, the new apparatus can also be used to estimate shear stress. Furthermore, the apparent drained angle is proposed as a new flow property for particles with poor flow behavior, and this allows the flowability of these particles to be evaluated.

DOI： 10.1252/kakoronbunshu.40.376

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：プラスチック成形加工学会  

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：プラスチック成形加工学会  

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Chemical Engineers, Japan  

著者らは固気流動層を用いてシックナーをモデルとした乾式比重分離装置を新規に開発した．本装置は比重の異なる試料を層内で浮揚あるいは沈降させることによって分離でき，それらを溢流と排出流によって装置外に取り出す仕組みである．この取り出し機構は層内に可動部や移動部をもたないことから，高速分離処理かつメンテナンス低減が期待できる．本装置を用いて溢流／排出流の比と分離試料投入速度が分離性能に及ぼす影響を検討した．流動化媒体にはシリカ砂を用い，分離試料としては直径 20 mm の比重の異なる球を用いた．溢流／排出流の比が0.44以下の場合は流れがない場合と比べて，浮沈境界比重がやや低下したが，浮沈のシャープネスは同じ値を示した．一方，溢流／排出流の比が0.64以上の場合は，浮沈境界比重は流れがない場合とほぼ同じ値を示したが，浮沈のシャープネスが悪化する傾向となった．次に溢流／排出流の比が0.44の条件で試料投入速度を変化させたところ，試料投入速度が 0.035 kg/s（流動層単位断面積当たりの体積換算処理速度=2.2 m³-object/(m²·h)）以下の場合は，ニュートン効率が0.9以上という非常に高い分離効率が得られた．従来の装置と本装置の単位断面積あたりの処理速度を比較したところ，本装置の処理速度が約3.4倍であることが明らかとなった．よって，本取り出し機構は高速分離処理とメンテナンス低減の点で有用であることが示唆された．

DOI： 10.1252/kakoronbunshu.39.178

CiNii Article

CiNii Books

researchmap

その他リンク： https://jlc.jst.go.jp/DN/JALC/10018806020?from=CiNii

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IOP PUBLISHING LTD  

We investigated the release characteristics of single-wall carbon nanotubes (CNTs) synthesized by a pilot-scale plant. In addition to on-site aerosol measurements at the pilot-scale plant where the CNTs were synthesized, harvested, and packed, we conducted dustiness tests by vortex shaking and by transferring CNTs from one bowl to another. In the results of the on-site aerosol measurements, slight increases in the concentration were observed by aerosol monitoring instruments in the enclosure where CNTs were harvested and packed. In filter samples collected in this enclosure, micron-sized CNT clusters were observed by electron microscopy analysis. For samples collected outside the enclosure or during other processes, no CNTs were observed. The concentrations of elemental carbon at all locations were lower than the proposed occupational exposure limits of CNTs. The results of the dustiness tests revealed that submicron-sized particles were dominant in the number concentration measured by aerosol monitoring instruments, whereas micron-sized CNT clusters were mainly observed by electron microscopy analysis. The results of dustiness tests indicate that these CNTs have a low release characteristic. The lower drop impact of CNT clusters due to their lower bulk density resulted in lower CNT release from falling CNTs.

DOI： 10.1088/1742-6596/429/1/012057

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apt.2013.01.004

Web of Science

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4164/sptj.49.810

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apt.2010.11.013

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apt.2011.08.002

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.2011.1085

Web of Science

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

We synthesized rod-shaped hydroxyapatite (HAp) nanoparticles using sodium bis(2-ethylhexyl) sulfosuccinate (AOT) as an additive in water without an oil. The length of the particles increases from 40 to 100 nm with increasing the concentration ratio AOT/Ca while maintaining a width of 12 nm. These results indicate that an oil phase is not necessarily needed to form the rod-shaped HAp nanoparticles using AOT.

DOI： 10.1246/cl.2011.400

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apt.2010.10.008

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.mineng.2010.10.010

Web of Science

researchmap

DOI： 10.1252/kakoronbunshu.37.317

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

DOI： 10.4164/sptj.47.458

CiNii Article

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/la902700j

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

DOI： 10.4164/sptj.47.92

CiNii Article

CiNii Books

J-GLOBAL

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apt.2009.11.002

Web of Science

researchmap

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

A method for dispersing dry particles in a liquid is described. The method involves coating large carrier particles with fine particles. When two types of particles having different sizes are mixed in dry conditions, the particles adhere to one another, and the large particles become coated with small particles. When the large core particles are coated with a mono-layer of small particles, further agglomeration is inhibited. Because the single small particles generated by the disruption adhere to the core particles, we presumed that, if the small particles that are adhered to large particles could be separated from the large particles by a sonication in a liquid, the dry fine particles could be dispersed in a liquid.
The dispersion experiments conducted using spherical silica particles having a count median diameter D(p50) of 74 nm as small particles and spherical glass beads as large particles. In this Situation, the large particles carry the small particles from a dry condition into a liquid. We refer to the large particles as carrier particles. The experiments revealed that the proposed dispersion procedure results in a superior product, compared to sonication only. The effect of carrier size on dispersion performance is also investigated. The findings indicate and an optimum carrier size exists. Observations of the carrier particle surfaces after dry mixing indicate that the optimum condition is the condition at which a mono-layer of Silica particles is formed. (C) 2009 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

DOI： 10.1016/j.apt.2009.10.004

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

We investigated how the increase of NaOH concentration in the water pool affects the phase behavior and size of Na-AOT-based W/O microemulsions. A mixture of NaOH aqueous solution/Na-AOT/isooctane was emulsified by changing the NaOH concentration C(NaOH) at a water content w(0) = [water]/[AOT(-)] = 10. FT-IR measurements demonstrated that the amount of water in the upper phase of the emulsified mixtures decreases with increasing C(NaOH) to form a lower phase, whereas the amount of AOT- in the upper phase remains nearly constant. Substituting NaCl for NaOH resulted in the corresponding phase behavior, indicating that the phase separation is due to the increase of not pH but Na(+) concentration. Possible mechanism for the phase separation is discussed by focusing on screening effect of Na(+) counterions on electrostatic repulsions between AOT(-) polar headgroups. The apparent water content w(0)&apos;, estimated using the amount of water and AOT- in the upper phase, decreases with increasing C(NaOH). DLS measurement showed that the upper phase contains single-nanometer W/O microemulsions and the size decreases with increasing C(NaOH) with progress of the phase separation. Measurements of FT-IR and DLS were also carried out for W/O microemulsions prepared with pure water by changing the water content w(0). Wavenumber positions of hydroxyl and sulfonate groups were determined by FT-IR measurements. Interestingly, the dependence of wavenumber positions and size on w(0)&apos; agrees with those on w(0), which indicates that variation of W/O microemulsion&apos;s property with progress of the phase separation corresponds to the variation with decreasing the water content to prepare W/O microemulsions with pure water. (C) 2009 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

DOI： 10.1016/j.apt.2009.08.003

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

The objective of this study is to estimate the contribution of Na+ as a counterion in the formation of H-AOT&Na-AOT-based W/O microemulsions using aqueous NaOH solution by pyranine absorbance measurements. A mixture of an aqueous NaOH solution containing pyranine/H-AOT&Na-AOT/isooctane was emulsified by changing the mixing ratio of Na-AOT (XNa-AOT = 0-1) and the mole fraction of NaOH (X-NaOH = [NaOH]/the AOT(-) concentration in the water pool = 0-1). The phase behavior of the emulsified mixture was evaluated from the absorbance of pyranine at the isosbestic point and by visual observations. W/O microelumsions are formed at the mid-range Of XNa-AOT, whereas the emulsified mixture separates into two phases at lower XNa-AOT and higher XNa-AOT. The two phase boundaries shift toward lower XNa-AOT as with increasing X-NaOH. The phase behavior depends on the degree of screening of electrostatic repulsions between the polar headgroups of AOT(-) by the Na+ counterion. Interestingly, nano-sized W/O microemulsions are formed without phase separation using a highly concentrated NaOH aqueous solution when the Na-AOT mixing ratio is appropriately adjusted. The phase behavior was plotted as X-NaOH versus XNa-AOT, and the correlation equations for the two phase boundaries were obtained by fitting the points. The contribution of the Na+ counterion from NaOH to W/O microemulsion formation was estimated by the correlation equations. The absorbance of pyranine and the size of W/O microernulsions, as measured by DLS, were plotted as a function of XNa+ = (x[Na+ from NaOH] + [Na+ from Na-AOT])/[AOT(-)], in which x is the ratio contributed by NaOH. The absorbance and size correlates well with XNa+, indicating that XNa+ is a meaningful parameter for quantitatively estimating phase behavior and size variation. (C) 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.colsurfa.2009.09.020

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Oil-in-water nanoemulsion which consisted of TEMPO, amphiphilic alcohols, and water offered unique reaction environments for electrooxidation of the alcohols to give the corresponding carboxylic acids in good to excellent yields. (c) 2009 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.tet.2009.06.005

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Powder Technology, Japan  

In this study, float-sink of chlorine containing and not-containing plastics in a gas-solid fluidized bed of silica sand was studied with and without joints in the air distributor and by changing the amount of objects loaded on the air distributor. The float-sink was evaluated using three parameters, i.e., recovery, purity and efficiency. The values obtained with the joints are smaller than without the joints, and decreased with increasing the amount of objects on the distributor. Because there is no airflow at the joints, the sand on the joints is not fluidized and circulating flow of the sand is generated over the area other than the joints. A 2D fluidized bed showed that air bubbles are not uniformly generated on the air distributor and the fluidization of the sand becomes intense when the objects are on the distributor. These results indicate that the circulating flow and the sudden intense fluidization disturb the expected float-sink of objects.

DOI： 10.4164/sptj.46.206

CiNii Article

CiNii Books

researchmap

その他リンク： https://jlc.jst.go.jp/DN/JALC/00328351051?from=CiNii

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：日本語   出版者・発行元：公益社団法人 化学工学会  

DOI： 10.11491/scej.2009.0.96.0

CiNii Article

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SOC CHEMICAL ENG JAPAN  

The dependence of water pilot pH on the water content of the W/O microemulsions was investigated by using the absorhance ratio of pH-sensitive probe pyranine. The W/O microemulsions were prepared with a mixture of an aqueous solution of pH 1-13 containing pyranine, AOT and isooctane at w(0) = [water]/[AOT] = 10, 20, 30 and 40. The water pool pH was estimated by comparing the absorbance ratios given by the W/O microemulsion and the aqueous solutions of pH 1-13. The experimental results suggest that the water pool pH is kept approximately constant its it buffer regardless of the solution pH 4-11, and that the water pool pH increases with decreasing w(0). As all additive factor to affect the absorbance ratio of pyranine. high Na(+) counterion concentration in the water pool was focused oft because the roughly estimated Na(+) concentration increases front 1.4 to 5.6 M with decreasing w(0). It was found by the ratio measurements for NaOH aqueous solutions that the ratio increases at NaOH concentration &gt; 5 M, which suggests that the ratio given by the W/O microemulsions is affected by not only pit, but also high Na(+) concentration in the water pool. It would be correct to assume that the AOT-based W/O microemulsions play a role of the buffer, and that the water pool pH depends on w(0). However, attention should be paid to the possibility that the water pool fill estimated by the absorbance ratio of pyranine may include the effect of high Na(+) concentration in the water pool.

DOI： 10.1252/jcej.07we287

Web of Science

researchmap

担当区分：最終著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Powder Technology, Japan  

Removal of single particles adhering on a flat plate by a high-speed air jet has been investigated experimentally. Although jet nozzle or removal target is scanned in an industrial application of the air jet removal, almost all previous fundamental investigations for the air jet removal were carried out with a fixed nozzle and a fixed target. Therefore, we aimed at elucidating how the scanning speed of target flat plate affects the removal efficiency.<br>Experimental results showed that the removal efficiencies at a constant air pressure of the nozzle decreased with an increase in the scanning speed of the target plate. With an increase in the scanning speed, the residence time of adhered particles in the effective jet exposure area is decreased. Therefore, the decrease in the removal efficiency with an increase of the scanning speed is caused mainly by a decrease in the residence time in the impinging air jet. It was also found that the effective area can be estimated by the equation of stable removal region on a fixed target.

DOI： 10.4164/sptj.45.690

CiNii Article

researchmap

担当区分：最終著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4164/sptj.45.297

CiNii Article

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Formation of iron oxide particles with aerosol-OT (AOT)/isooctane/water emulsion was carried out employing a coprecipitation reaction for Fe 3O4 particles. Emulsions containing Fe2+/ Fe3+ were mixed with those containing OH-. Iron oxide particles were formed by changing the concentration ratio of AOT to iron ions and maintaining the volume fraction of water in the emulsion at 0.25. Particle formation was also carried out using nonemulsified aqueous solutions as a reference. The morphology, crystal structure, magnetic property and hydration degree of the particles formed under various conditions were compared. The α-FeOOH or amorphous particles are formed instead of Fe3O 4 when the AOT concentration is comparable to, or higher than, the iron ion concentration. These particles contain an OH group and water, and are oxidized to become α-Fe2O3 by heating in N 2. The Fe-AOT complex as the origin of OH-rich particle formation was the focus of this investigation. The IR measurement was carried out for the Fe-AOT complex, separately prepared with the aqueous solution. It was found that the Fe-AOT complex was hydrated, indicating that hydration of the complex affects the properties of particles formed by the emulsion. A possible mechanism for formation of α-FeOOH or amorphous particles with emulsion is proposed. © 2008 Curtin University of Technology and John Wiley &amp
Sons, Ltd.

DOI： 10.1002/apj.143

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：GEORG THIEME VERLAG KG  

Oil-in-water nanoemulsions, consisting of TEMPO, amphiphilic alcohols, and water, offer unique reaction environments for electrooxidation of the alcohols to give the corresponding carboxylic acids in good to excellent yields.

DOI： 10.1055/s-2007-991070

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

DOI： 10.4164/sptj.43.882

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Powder Technology, Japan  

Fluidized bed medium separation (FBMS) was applied to separate objects with a small specific gravity difference by precisely controlling the apparent specific gravity of gas-solid fluidized bed with binary particle systems. The binary systems of particles with various specific gravities and diameters were employed, and the apparent specific gravity of fluidized bed, g_fb and the dispersion, Δg_fb, were measured by changing the bulk volume fraction of heavier particle, V_hp, and the superficial air velocity, u₀. It was found that g_fb can be controlled by V_hp and u₀ because g_fb varies with the total mass of particles and the bed expansion. On the other hand, since Δg_fb is determined by the extent of segregation of fluidized particles and the fluidization intensity, Δg_fb decreases with reducing the extent of the segregation and the vertical fluctuation of fluidized bed surface. The experimental results showed that practical fluidized conditions for FBMS are in the range of g_fb≈0.5-3.8 and Δg_fb≤0.1. Under these fluidized conditions, plastics with a small difference in specific gravity (0.04-0.24) were almost completely separated at the top and the bottom of the fluidized bed.

DOI： 10.4164/sptj.43.567

CiNii Article

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4164/sptj.43.260

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Powder Technology, Japan  

Three kinds of particles with different hydrophilic and hydrophobic properties were used as fluidized particles of Fluidized Bed Medium Separation (FBMS). Minimum fluidization velocity, apparent specific gravity of fluidized bed and floating-sinking behaviors of dry and wet coals were measured in order to investigate the stability of fluidization by changing relative humidity of air flow introduced from the bottom of the fluidized bed. The fluidization of hydrophilic particles became unstable with increasing the relative humidity, because particle aggregation took place at a high humidity. On the other hand, the fluidization of highly hydrophobic particles was stable with wet coals even at a high humidity. Therefore, the FBMS with highly hydrophobic particles is applicable to the density separation of coals at a high relative humidity without a control device for the relative humidity.

DOI： 10.4164/sptj.43.252

CiNii Article

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SOC CHEMICAL ENG JAPAN  

Fluidized bed medium separation (FBMS) was applied for gravity separation of plastics containing or not Cl for recycle of home electric appliance shredder residue. We employed mixtures of glass beads (G.B.) and polystyrene particles (PS.) with various mixing ratios as fluidizing particles. Floating and sinking of the plastics were examined by changing the bulk volume fraction and the superficial velocity u(o). The plastics were almost completely separated at the conditions of G.B.: P.S.=8: 2 and u(o)/u(mf) = 1.5 where u(mf) is the minimum fluidization velocity. Similar experiments were carried out by changing dimensional parameters of plastics, such as equivalent volume diameter D-v, flatness ratio R-f and aspect ratio R-a. As a result, it was found that influence of D-v on float-sink behavior was the highest and contribution ratio of D-v was about 75%.

DOI： 10.1252/kakoronbunshu.32.115

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1299/kikaic.71.2321

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Powder Technology, Japan  

Fluid penetration method is applied in order to evaluate the non-uniformity of a particle bed structure. The apparatus developed consists of a cubic sample box which can be set on either surface. The pressure drops across the packed bed in the packing direction and its perpendicular direction were measured. The fluid penetration resistance in gravitational direction (=packing direction) was higher than that in the perpendicular direction, and the difference depended on the particle size and shape.<br>In order to find the relationship between the differences and the orientation of particles to the packing direction in a packed bed, experiments were conducted using a model packed bed consisting of uniform cylinders with a diameter of 4mm and a length of 100mm. A correlation was obtained between the orientation angle of cylinder axis to the packing direction and the ratio of specific surface area in perpendicular direction to that in the gravitational direction which were determined by the pressure drop measurements. Non-uniformity of a packed bed structure can be evaluated with the orientation angle to the packing direction using the obtained correlation.

DOI： 10.4164/sptj.42.613

CiNii Article

researchmap

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：VSP BV  

We studied the behavior of particles in the thermal convective flow field induced by heating and cooling of opposed vertical walls experimentally. The object is the effect of the circulating convection on a particle behavior during sedimentation or floatation. Visualization of particle behavior revealed that the thermal convective flow segregated the particle into the hot wall side, resulting in the local re-circulation of particles along the hot wall when the particle density is higher than that of fluid, while the flow segregated the particle into the cold wall side when the particle density is lower than that of the fluid. These segregations are center symmetrical when the absolute values of density differences are the same. In order to investigate the main cause of the segregation, we simulated the particle trajectories in two types of circulating flow: (i) thermal convection and (ii) simple circulation induced by shear. By comparing the particle trajectories in these two flow fields, it was found that the circulating fluid motion causes the segregation, but the thermal convection enhances the segregation. The enhancement must be attributed by the distribution of fluid properties induced by the temperature distribution.

DOI： 10.1163/1568552042000237

Web of Science

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1252/kakoronbunshu.29.500

Scopus

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Powder Technology, Japan  

The effect of fuel particle shape on the reverse combustion process of a packed bed was investigated through the comparison of combustion of spherical-particle packed bed and non-spherical particle bed. In the experiment, we measured the combustion propagation rate at various superficial gas velocties by using the spherical and non-spherical granular activated carbon particles consisting of the same primary particles. Experimental results showed that the propagation rate of non-spherical particles was higher than that of spherical particles with the same diameter measured by sieves and that the rate of smaller particles was higher than that of larger particles. The combustion propagation rates were well correlated by the equivalent specific surface area obtatined by penetration method. This implies that the effect of particle shape on the reverse combustion of packed bed can be estimated by the penetration method.

DOI： 10.4164/sptj.39.743

CiNii Article

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1299/kikaib.68.2036

Scopus

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1252/kakoronbunshu.28.227

Scopus

researchmap

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

Annular jet-type virtual impactor was developed and tested with the use of an industrial powder. The new virtual impactor was designed based on an impactor having a rectangular jet. It was expected that the new impactor has a superior performance compared to the impactor with a rectangular jet because the annular jet has no end, which causes the deterioration of the performance. The classification experiments, however, showed lower performance than expected. Observation of the deposited pattern of the classified particles revealed that the flow was asymmetric, i.e. the flow had a three-dimensional structure in azimuthal direction. Therefore, the collection nozzle was improved so as to divide the classification zone into four parts and to accelerate the flow in each part. As a result of the improvement. 50% cut-size of the annular-type virtual impactor was well-fit to the theoretical value and the separation efficiency at the diameter smaller than 50% cut-size was close to the theoretical curve.
However, the separation efficiency at the diameter larger than 50% cut-size was unchanged. From the comparison of configurations of the impactors used in a previous work and in this work. we presume that the shape of the nozzle collecting a finer aerosol affects the classification performance. In order to confirm the prediction, classification experiments were carried out by small-scale rectangular jet virtual impactors having different nozzle angles. The results revealed that the smaller nozzle angle deteriorates the classification performance even for the same configuration of the classification zone. The result implies that the performance of the annular-type virtual impactor can further be improved if the nozzle shape is properly designed. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0032-5910(01)00296-0

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

A two-layer, salt-stratified NaCl-H2O system destabilized and mixed by lateral heating and cooling is considered in this paper. Flow visualizations are performed to examine the structure of the diffusive interface that separates the convection layers. Simultaneous temperature measurement and flow visualization technique reveal the existence of a regular, three-dimensional flow structure consisting of time-periodic buoyant plumes within the interface, which are due to instabilities of diffusive type. The plumes aligned in the spanwise direction travel toward the hot wall above the interface and toward the cold wall below the interface, respectively, and there is a phase shift of a half plume spacing between the upper and lower ones. Consequently, temperature and concentration oscillations are periodically observed in the paths of plumes. (C) 2000 American Institute of Physics. [S1070-6631(00)50511-X].

DOI： 10.1063/1.1308511

Web of Science

researchmap

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1080/027868200303759

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/S0921-8831(08)60447-1

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本エアロゾル学会  

Removal of deposited single particles by use of a vibrating air jet has been studied experimentally, with particular attention to the effect of operating conditions. Two types of nozzle were newly designed and 6 sorts of metal plates were used as a vibrating plate. Twelve combinations of the nozzle and the vibrating plate have been tested to get the best combination for the generation of a high frequency vibration. Experimental results showed that the removal efficiency is almost determined by the vibration characteristics rather than air jet velocity. When the nozzle pressure is set at 2.5&times;10⁵ Pa or 3.0&times;10⁵ Pa, the removal efficiency tends to increase with the frequency of the vibration at the surface. In this case, longer jet duration time enhances the efficiency. Then, the number of repetition of pressure pulsation is one of the main cause of the effects of vibration. On the other hand, when the pressure is set at 3.5&times;10⁵ Pa, the removal efficiency is affected by the shape of the vibrating wave.

DOI： 10.11203/jar.13.133

CiNii Article

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：The Society of Chemical Engineers, Japan  

偏析は粒子流動に伴う現象であり, 経験的・実験的な検討から, 一般的傾向について知見が得られているものの, ミクロなメカニズムの観察は困難であった.本研究では, まず2次元DEMを用いたシミュレーションをガラスビーズの投入時の粒度偏析現象の実験について実施した.これは全体的な堆積の挙動については実験と対応した結果を示したが, 堆積層内粒度分布の偏析の傾向を再現できなかった.次に, 部分モデルを設定し, 2次元および3次元の解析を実施して結果を比較した.2次元の結果が大きいばらつきを示したのに対し, 3次元では堆積過程を表現するとともに, 実験で示された偏析の傾向を再現することができた.また, その結果を粒子単位で評価することにより, 実験で想定された偏析のメカニズムが妥当であることを確認した.

DOI： 10.1252/kakoronbunshu.22.622

CiNii Article

CiNii Books

researchmap

その他リンク： https://jlc.jst.go.jp/DN/JALC/00237092816?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/0927-7757(95)03471-4

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Powder Technology, Japan  

The size segregation of polydispersed particles stored in a container was studied experimentally by tapping varying the number of taps and the falling height of the container. Tested particles ranged from 150-600μm in size.<br>It was found that the smaller particles were concentrated at the vicinity of the container bottom, while larger particles were concentrated at the upper-side. The mass median diameter (MMD) of the particles concentrated along the container bottom became smaller as the number of tapping increased and converged to a certain value. The deviation of this value from the MMD of the feed-particles was almost proportional to the square root of the falling height. This fact showed that the deviation in MMD was related to the impact force of particles which was induced by the tapping.<br>Visualization of particle movement was also carried out by the use of colored particles. It was found that the particle recirculation was induced in the container by the tapping; i. e. at the center of the container, particles were rising from the bottom to the surface of the particle-layer, while particles were dropping in the vicinity of the periphery where smaller particles moved down faster than larger particles. On the other hand, larger particles moved faster than smaller particles from the periphery to the center. Thus, it was confirmed that such differences in the movement between larger and smaller particles caused the vertical size segregation of the particles in the container.

DOI： 10.4164/sptj.32.89

CiNii Article

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1252/kakoronbunshu.20.685

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Chemical Engineers, Japan  

表面に付着した微粒子の高速気流 (エアージェット) による除去操作に対して, 1～10μmの粒径の数種の単分散粒子を用いて気流の強さを変えて実験を行い, 平滑表面上での除去率に及ぼす粒子径の影響を検討した.また, 凹凸のある各種表面についても実験を行い, 表面の凹凸と付着粒子の相対的な大きさの影響を検討した.除去対象面上の気流の動圧を用いると, ノズルと除去対象面の距離の異なる実験結果を統一的に表すことができる.この結果, 平滑面上の付着粒子を50%除去するのに必要な圧力は粒子径のほぼ2乗に反比例することがわかった.<BR>材質による50%除去圧力の変化は, van der Waals力の比を基にして, 物性値 (Hamaker定数および弾性特性係数) の比と, 粒径と表面曲率半径の比で定義される相対粗さの関数として近似的に推算できることがわかった.また, 粒子の分離力は気流動圧の2乗, および, 粒径の6乗に正比例するという関係式が得られた.

DOI： 10.1252/kakoronbunshu.20.693

CiNii Article

CiNii Books

researchmap

その他リンク： https://jlc.jst.go.jp/DN/JALC/00028623489?from=CiNii

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/S0921-8831(08)60750-5

Web of Science

researchmap

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

researchmap

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

CiNii Article

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本エアロゾル学会  

The classification performance of an improved rectangular jet virtual impactor having clean air entrances has been studied with particular attention to the effect of acceleration distance. Experimental results showed when the acceleration distance was shorter than a certain value, the classification performance became extremely worse. Flow visualization revealed this performance deterioration was attributed to the distortion in the flow field. Experimental results obtained under no flow distortion showed that longer acceleration distance caused a lower classification performance in the low inertia region because of particle diffusion, whereas shorter distance gave a lower performance in the high inertia region. However, it was found that the deterioration in the classification performance could be avoided if the partition plate for the wall side clean air entrance was set at shorter distance from the jet and that for the slit side clean air entrance was set at relatively longer distance.

DOI： 10.11203/jar.3.212

CiNii Article

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

researchmap

記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）  

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

記述言語：日本語   出版者・発行元：[粉体に関する討論会]  

CiNii Article

CiNii Books

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）  

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）   出版者・発行元：化学工学会  

CiNii Article

CiNii Books

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

記述言語：日本語   出版者・発行元：JAPAN ASSOC AEROSOL SCI & TECHNOLOGY  

There is growing concern about the potential impact of nanomaterials on human health. A significant exposure route is inhalation during manufacture and handling. Information on airborne nanomaterials, such as the magnitude of release, size distribution, and morphology, is required to evaluate and control nanomaterial exposure. In this study, dustiness testing of nanomaterials was conducted by the vortex shaker method. Aerosol particles released during agitation by passing air were measured by aerosol measurement instruments.

Web of Science

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

記述言語：日本語   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

記述言語：英語   掲載種別：記事・総説・解説・論説等（学術雑誌）  

DOI： 10.14356/kona.2008020

Web of Science

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：記事・総説・解説・論説等（学術雑誌）  

DOI： 10.14356/kona.2007026

Web of Science

researchmap

記述言語：日本語   出版者・発行元：粉体工学会  

CiNii Article

CiNii Books

researchmap

担当区分：筆頭著者   記述言語：日本語  

CiNii Article

CiNii Books

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）  

researchmap

開催年月日： 2017年7月30日 - 2017年8月3日

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2016年3月28日 - 2016年4月1日

記述言語：英語   会議種別：口頭発表（招待・特別）  

開催地：Phoenix, Arizona, USA  

researchmap

開催年月日： 2015年9月15日 - 2015年9月18日

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2015年9月15日 - 2015年9月18日

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2015年7月7日 - 2015年7月10日

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2015年6月24日 - 2015年6月27日

記述言語：英語   会議種別：ポスター発表  

開催地：Kanazawa, Japan  

researchmap

開催年月日： 2013年

記述言語：英語  

We investigated the release characteristics of single-wall carbon nanotubes (CNTs) synthesized by a pilot-scale plant. In addition to on-site aerosol measurements at the pilot-scale plant where the CNTs were synthesized, harvested, and packed, we conducted dustiness tests by vortex shaking and by transferring CNTs from one bowl to another. In the results of the on-site aerosol measurements, slight increases in the concentration were observed by aerosol monitoring instruments in the enclosure where CNTs were harvested and packed. In filter samples collected in this enclosure, micron-sized CNT clusters were observed by electron microscopy analysis. For samples collected outside the enclosure or during other processes, no CNTs were observed. The concentrations of elemental carbon at all locations were lower than the proposed occupational exposure limits of CNTs. The results of the dustiness tests revealed that submicron-sized particles were dominant in the number concentration measured by aerosol monitoring instruments, whereas micron-sized CNT clusters were mainly observed by electron microscopy analysis. The results of dustiness tests indicate that these CNTs have a low release characteristic. The lower drop impact of CNT clusters due to their lower bulk density resulted in lower CNT release from falling CNTs.

researchmap

開催年月日： 2012年7月2日 - 2012年7月5日

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2010年4月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2007年9月5日

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Beijing, China  

researchmap

開催年月日： 2007年9月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2005年11月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2004年10月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2004年10月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 2003年12月17日 - 2003年12月19日

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Peneng, Malaysia  

researchmap

開催年月日： 2002年9月

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Taipei  

researchmap

開催年月日： 2001年9月

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Leipzig, Germany  

researchmap

開催年月日： 2001年6月24日 - 2001年6月27日

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Seol, Korea  

researchmap

開催年月日： 2000年10月1日 - 2000年10月6日

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Kobe, Japan  

researchmap

開催年月日： 2000年9月8日 - 2000年9月13日

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Dublin, Ireland  

researchmap

開催年月日： 1999年5月16日 - 1999年5月19日

記述言語：英語   会議種別：口頭発表（一般）  

開催地：Honolulu, USA  

researchmap

開催年月日： 1998年9月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 1998年9月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 1998年8月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 1997年9月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 1995年9月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 1995年9月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 1994年8月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap

開催年月日： 1990年9月

記述言語：英語   会議種別：口頭発表（一般）  

researchmap