2021/11/30 更新

写真a

オキハラ タクミ
沖原 巧
OKIHARA Takumi
所属
自然科学学域 講師
職名
講師
外部リンク

学位

  • 工学博士 ( 京都大学 )

研究キーワード

  • polymer material

  • polymer science

  • polysaccharides

  • biodegradable polymer

  • 高分子固体構造

  • 高分子化学

  • 機能性高分子

  • 高分子結晶化

  • 多糖

  • 生分解性高分子

研究分野

  • ナノテク・材料 / 高分子材料

  • ナノテク・材料 / 高分子化学

  • ナノテク・材料 / 有機機能材料

学歴

  • 京都大学    

    - 1991年

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    国名: 日本国

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  • 京都大学   Graduate School, Division of Engineering  

    - 1991年

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経歴

  • - Senior Assistant Professor,Graduate School of Natural Science and Technology,Okayama University

    2004年

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  • - 岡山大学自然科学研究科 講師

    2004年

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所属学協会

▼全件表示

委員歴

  • 日本接着学会   評議員  

    2016年6月 - 現在   

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    団体区分:学協会

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  • 高分子学会   ポリマー材料フォーラム運営委員  

    2007年 - 2008年   

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    団体区分:学協会

    高分子学会

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論文

  • Multiwall Carbon Nanotube Composites as Artificial Joint Materials 査読

    Atsushi Sobajima, Takumi Okihara, Shigeaki Moriyama, Naoyuki Nishimura, Takako Osawa, Kazutaka Miyamae, Hisao Haniu, Kaoru Aoki, Manabu Tanaka, Yuki Usui, Ken-ichi Sako, Hiroyuki Kato, Naoto Saito

    ACS Biomaterials Science & Engineering   6 ( 12 )   7032 - 7040   2020年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/acsbiomateri

  • Development of self-adhesive pulp-capping agents containing a novel hydrophilic and highly polymerizable acrylamide monomer 査読 国際共著 国際誌

    Kumiko Yoshihara, Noriyuki Nagaoka, Takumi Okihara, Masao Irie, Akihiro Matsukawa, Mariano Simón Pedano, Yukinori Maruo, Yasuhiro Yoshida, Bart Van Meerbeek

    Journal of Materials Chemistry B   8 ( 24 )   5320 - 5329   2020年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/D0TB00079E

  • セルロースナノファイバーとポリアクリロニトリルとの複合材料による多孔質炭素材料の開発

    沖原 巧

    Cellulose communications   25 ( 1 )   15 - 16   2018年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • Etching efficacy of self-etching functional monomers 査読

    沖原 巧

    Journal of dental research   0022034518763606   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Adsorption and desorption behaviors of cetylpyridinium chloride on hydroxyapatite nanoparticles with different morphologies 査読

    Masahiro Okada, Daisuke Hiramatsu, Takumi Okihara, Takuya Matsumoto

    DENTAL MATERIALS JOURNAL   35 ( 4 )   651 - 658   2016年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:JAPANESE SOC DENTAL MATERIALS DEVICES  

    Application of hydroxyapatite (HAp) nanoparticles to repair damaged enamel has attracted recent attention. In this study, HAp nanoparticles with various morphologies (spherical, short-rod, long-rod and fiber morphologies) were synthesized via chemical precipitation methods without the addition of template molecules, and the adsorption/desorption behaviors of a cationic antibacterial agent, cetylpyridinium chloride (CPC), on the HAp nanoparticles were evaluated. The adsorption of CPC on each HAp nanoparticle showed Langmuir-type adsorption, and the short-rod/long-rod HAp nanoparticles showed thermodynamically more stable adsorption of CPC than that with the spherical/fiber HAp nanoparticles. The desorption rate of CPC from the short-rod/long-rod HAp nanoparticles was slower than that of the spherical/fiber HAp nanoparticles. The HAp nanoparticles with different CPC release profiles presented here have potential applications as nanoparticulate enamel repair agents with antibacterial properties.

    DOI: 10.4012/dmj.2015-420

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MISC

  • Bone engineering by phosphorylated-pullulan and β-TCP composite

    Tomohiro Takahata, Takumi Okihara, Yasuhiro Yoshida, Kumiko Yoshihara, Yasuyuki Shiozaki, Aki Yoshida, Kentaro Yamane, Noriyuki Watanabe, Masahide Yoshimura, Mariko Nakamura, Masao Irie, Bart Van Meerbeek, Masato Tanaka, Toshifumi Ozaki, Akihiro Matsukawa

    Biomedical Materials   10 ( 6 )   065009   2015年12月

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  • Phosphorylated Pullulan Bioadhesive for Regeneration and Reconstruction of Bone and Tooth

    Yasuhiro Yoshida, Takumi Okihara, Mariko Nakamura, Takuya Matsumoto

    BIOCERAMICS 24   529-530   516 - +   2013年

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    記述言語:英語   出版者・発行元:TRANS TECH PUBLICATIONS LTD  

    A biodegradable material that bonds to hard tissues such as bones and teeth is urgently needed for medical and dental applications. However, such materials are not available in today's clinical practice of orthopedics and dentistry. Therefore, we synthesized biodegradable phosphorylated pullulan to develop a biomaterial that combines primary properties such as high biocompatibility, good bonding potential to hard tissue, high strength, biodegradability, and osteoconductivity. The pharmacopoeial polysaccharide pullulan was chemically functionalized with dihydrogen phosphate groups. Phosphorylated pullulan was formed network by adding calcium ion, making the composite less soluble in water. Adhesive force measurement revealed that adhesiveness of the pastes before setting can be controlled through optimization of additives. In addition, histological evaluation revealed that phosphorylated pullulan-based composite possesses high biocompatibility. These results indicate that phosphorylated pullulan can be used as a key material for regeneration and reconstruction of bone and tooth.

    DOI: 10.4028/www.scientific.net/KEM.529-530.516

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  • Epitaxial crystallization and crystalline polymorphism of polylactides

    Laurent Cartier, Takumi Okihara, Yoshito Ikada, Hideto Tsuji, Jordi Puiggali, Bernard Lotz

    Polymer   2000年

  • The frustrated structure of poly(L-lactide)

    Laurent Cartier, Takumi Okihara, Yoshito Ikada, Hideto Tsuji, Jordi Puiggali, Bernard Lotz

    Polymer   2000年

  • Frustration and single crystal morphology of isotactic poly(2-vinylpyridine)

    T. Okihara, L. Cartier, G. O.R. Alberda Van Ekenstein, B. Lotz

    Polymer   40 ( 1 )   1 - 11   1999年

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    記述言語:英語   出版者・発行元:Elsevier BV  

    The crystal structure of isotactic poly(2-vinylpyridine) (iP2VP) established in 1977 by Puterman et al. is shown to conform to a recently proposed frustrated packing scheme which involves three isochiral three-fold helices packed in a trigonal unit-cell, and observed in a number of polymers and biopolymers. Single crystals of iP2VP grown from thin films at high temperature (Tc ≈ 200°C) display highly unusual morphologies with six (100) growth sectors but a three-fold overall symmetry apparent through different lamellar thicknesses in adjacent growth sectors, and oblique growth facets of three of the sectors. These features are morphological manifestations of the frustration of the helix packing, and support the P31 or P32 space group of the unit-cell. The different lamellar thicknesses are mainly due to an isothermal thickening process, which has different impacts depending on the nature of the growth faces. Analysis of the growth features of frustrated structures can be of help when dealing with finer details of theories of polymer crystal growth. © 1998 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0032-3861(98)00220-1

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  • Frustration and single crystal morphology of isotactic poly(2-vinylpyridine)

    T. Okihara, L. Cartier, G. O.R. Alberda Van Ekenstein, B. Lotz

    Polymer   40 ( 1 )   1 - 11   1999年

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    記述言語:英語   出版者・発行元:Elsevier BV  

    The crystal structure of isotactic poly(2-vinylpyridine) (iP2VP) established in 1977 by Puterman et al. is shown to conform to a recently proposed frustrated packing scheme which involves three isochiral three-fold helices packed in a trigonal unit-cell, and observed in a number of polymers and biopolymers. Single crystals of iP2VP grown from thin films at high temperature (Tc ≈ 200°C) display highly unusual morphologies with six (100) growth sectors but a three-fold overall symmetry apparent through different lamellar thicknesses in adjacent growth sectors, and oblique growth facets of three of the sectors. These features are morphological manifestations of the frustration of the helix packing, and support the P31 or P32 space group of the unit-cell. The different lamellar thicknesses are mainly due to an isothermal thickening process, which has different impacts depending on the nature of the growth faces. Analysis of the growth features of frustrated structures can be of help when dealing with finer details of theories of polymer crystal growth. © 1998 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0032-3861(98)00220-1

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  • Frustration and single crystal morphology of isotactic poly(2-vinylpyridine)

    Takumi Okihara, Laurent Cartier, G.O.R.Alberda, van Ekenstain, Bernard Lotz

    Polymer   1999年

  • Facilitated Transport of Ethyl Docosahexaenoate Through Solution-Cast Perfluo rosulfonated Ionomer Membranes

    H.Matsuyama, Y.Kitamura, Y.Doi, S.Ohtsuka, Y.Matsuba, T.Okihara

    Journal of Applied Polymer Science   1999年

  • Facilitated transport of ethyl docosahexaenoate through solution-cast perfluorosulfonated ionomer membranes

    Hideto Matsuyama, Yoshiro Kitamura, Yuji Doi, Shigeru Ohtsuka, Yorishige Matsuba, Takumi Okihara

    Journal of Applied Polymer Science   73 ( 6 )   961 - 968   1999年

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    記述言語:英語   出版者・発行元:John Wiley & Sons Inc  

    The facilitated transport of ethyl docosahexaenoate (DHA-Et) through the thin solution-cast perfluorosulfonated ionomer membranes has been studied. The carrier of DHA-Et was silver ion and was immobilized in the support ionomer membrane by electrostatic forces. In this system, the feed phase, membrane phase, and receiving phase had the same solvent. This system was already proved to be highly stable in our previous work. When ethanol/water (85/15) was used as the solvent, the DHA-Et permeance in the cast membrane was about four times higher than that in the commercial Nafion 117 membrane, due to the smaller membrane thickness. In the case of acetone solvent, a high selectivity of DHA-Et to ethyl oleate of 42 and a high facilitation factor of 153 were obtained. These membrane performances were superior to those of the Nafion 117 membrane. The effects of membrane preparation conditions, such as annealing temperature and kinds of polar solvents added to the ionomer solution before annealing, on the membrane performance was investigated in detail. Furthermore, small-angle X-ray scattering (SAXS) measurement was carried out to study the membrane structure. The experimental result suggests higher crystallinity in the cast membrane annealed at higher temperature.

    DOI: 10.1002/(SICI)1097-4628(19990808)73:6<961::AID-APP13>3.0.CO;2-C

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  • Facilitated transport of ethyl docosahexaenoate through solution-cast perfluorosulfonated ionomer membranes

    Hideto Matsuyama, Yoshiro Kitamura, Yuji Doi, Shigeru Ohtsuka, Yorishige Matsuba, Takumi Okihara

    Journal of Applied Polymer Science   73 ( 6 )   961 - 968   1999年

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    記述言語:英語   出版者・発行元:John Wiley &amp; Sons Inc  

    The facilitated transport of ethyl docosahexaenoate (DHA-Et) through the thin solution-cast perfluorosulfonated ionomer membranes has been studied. The carrier of DHA-Et was silver ion and was immobilized in the support ionomer membrane by electrostatic forces. In this system, the feed phase, membrane phase, and receiving phase had the same solvent. This system was already proved to be highly stable in our previous work. When ethanol/water (85/15) was used as the solvent, the DHA-Et permeance in the cast membrane was about four times higher than that in the commercial Nafion 117 membrane, due to the smaller membrane thickness. In the case of acetone solvent, a high selectivity of DHA-Et to ethyl oleate of 42 and a high facilitation factor of 153 were obtained. These membrane performances were superior to those of the Nafion 117 membrane. The effects of membrane preparation conditions, such as annealing temperature and kinds of polar solvents added to the ionomer solution before annealing, on the membrane performance was investigated in detail. Furthermore, small-angle X-ray scattering (SAXS) measurement was carried out to study the membrane structure. The experimental result suggests higher crystallinity in the cast membrane annealed at higher temperature.

    DOI: 10.1002/(SICI)1097-4628(19990808)73:6<961::AID-APP13>3.0.CO;2-C

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  • The α Superstructure of Syndiotactic Polystyrene : A Frustrated Structure

    Macromolecules   31 ( 10 )   3303 - 3310   1998年5月

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    記述言語:英語  

    DOI: 10.1021/ma9719059

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  • The α″ "superstructure" of syndiotactic polystyrene: A frustrated structure

    Laurent Cartier, Takumi Okihara, Bernard Lotz

    Macromolecules   31 ( 10 )   3303 - 3310   1998年5月

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    記述言語:英語   出版者・発行元:American Chemical Society  

    The crystal structure of syndiotactic polystyrene (sPS) in its stable α form (a so-called "superstructure" named α″) is reevaluated. As shown by all previous investigations, the trigonal unit cell contains three triplets of extended sPS chains. The azimuthal orientation of the three triplets is shown to differ from those assumed so far, which generates a clear-cut example of frustrated packing. The azimuthal settings and relative shifts of the triplets indicate that two triplets maximize their interactions, while the third one interacts less favorably with its neighbors. This frustrated packing scheme fully justifies the three-triplets unit cell and constitutes an interesting variant of related frustrated packings previously described for isochiral three-fold helices.

    DOI: 10.1021/ma9719059

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  • Triangular polymer single crystals: Stereocomplexes, twins, and frustrated structures

    Laurent Cartier, Takumi Okihara, Bernard Lotz

    Macromolecules   30 ( 20 )   6313 - 6322   1997年10月

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    記述言語:英語   出版者・発行元:American Chemical Society  

    The crystallographic origins leading to the formation of polymer single crystals with highly unusual triangular shapes are analyzed. Triangular crystals are obtained: (a) for stereocomplexes of poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA) crystallizing in a trigonal unit cell with A3c (or A-3c) symmetry. In this case, the triangular morphology results from the different molecular characteristics (mainly molecular weight) of the stereoisomer polymers used to form the complex, which in turn introduce different rates of deposition on opposite sides of the (110) crystallographic growth plane and therefore to the triangular morphology. A contrario, when molecularly (near) identical stereoisomers are used in equal concentrations, or when an (achiral) homopolymer crystallizing in the same crystal structure is used, the growth rates are equal and hexagonal crystals are formed (b) for some multiple twins, in particular triple growth twins of PLLA in its α form (c) for frustrated trigonal polymer crystal structures, in which different nucleation sites exist on opposite sides of a given growth plane. This difference in growth rates results from a genuine lack of symmetry of the crystal structure: triangular crystals are a morphological marker of the frustrated character of the packing in the unit cell. Further consequences of this frustration, such as differences in lamellar thicknesses for nominally equivalent growth sectors, shed new light on the details of nucleation and growth theories of polymer single crystals.

    DOI: 10.1021/ma9707998

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  • Triangular polymer single crystals: Stereocomplexes, twins, and frustrated structures

    Laurent Cartier, Takumi Okihara, Bernard Lotz

    Macromolecules   30 ( 20 )   6313 - 6322   1997年10月

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    記述言語:英語   出版者・発行元:American Chemical Society  

    The crystallographic origins leading to the formation of polymer single crystals with highly unusual triangular shapes are analyzed. Triangular crystals are obtained: (a) for stereocomplexes of poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA) crystallizing in a trigonal unit cell with A3c (or A-3c) symmetry. In this case, the triangular morphology results from the different molecular characteristics (mainly molecular weight) of the stereoisomer polymers used to form the complex, which in turn introduce different rates of deposition on opposite sides of the (110) crystallographic growth plane and therefore to the triangular morphology. A contrario, when molecularly (near) identical stereoisomers are used in equal concentrations, or when an (achiral) homopolymer crystallizing in the same crystal structure is used, the growth rates are equal and hexagonal crystals are formed (b) for some multiple twins, in particular triple growth twins of PLLA in its α form (c) for frustrated trigonal polymer crystal structures, in which different nucleation sites exist on opposite sides of a given growth plane. This difference in growth rates results from a genuine lack of symmetry of the crystal structure: triangular crystals are a morphological marker of the frustrated character of the packing in the unit cell. Further consequences of this frustration, such as differences in lamellar thicknesses for nominally equivalent growth sectors, shed new light on the details of nucleation and growth theories of polymer single crystals.

    DOI: 10.1021/ma9707998

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  • A bimodal structure of solution‐grown isotactic polypropylene with orthogonally crossed lamellae

    Isao Masada, Takumi Okihara, Shozo Murakami, Masayoshi Ohara, Akiyoshi Kawaguchi, Ken‐Ichi Katayama

    Journal of Polymer Science Part B: Polymer Physics   31 ( 7 )   843 - 852   1993年

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    記述言語:英語  

    Isotactic polypropylene (iPP) was crystallized from solution on a uniaxially‐oriented iPP film. Small‐angle x‐ray scattering patterns obtained from the sample showed two perpendicularly crossed lameliae 9.3 nm thick that overgrew flat‐on and edge‐on on the substrate. In the through wide‐angel x‐ray diffraction pattern (taken with incident x‐rays normal to the iPP film surface), strong hkO reflections were arranged in an hkO net pattern indicating that the a‐axis of the monoclinic α unit cell was oriented parallel to the chain direction of the substrate. From this, it was concluded that the flat‐on lamellae grew with the a‐axis parallel to the chain axis of the substrate and with the b‐axis parallel to its surface. In the edge wide‐angle x‐ray diffraction pattern (X‐rays incident on the edge of the film), arced, strong 110 and 220 reflections from overgrown crystals were observed on the equator of the fiber pattern of the substrate. This indicated that the edge‐on lamellae epitaxially grew with the c‐axis aligned parallel to the chain axis of the substrate. The homoepitaxy explains the correlated growth mode between the orthogonally crossed lamellae: they grew epitaxially, the a‐axis of one lamella coinciding with the c‐axis of the other and the {010} planes in contact. © 1993 John Wiley &amp
    Sons, Inc. Copyright © 1993 John Wiley &amp
    Sons, Inc.

    DOI: 10.1002/polb.1993.090310712

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  • A bimodal structure of solution‐grown isotactic polypropylene with orthogonally crossed lamellae

    Isao Masada, Takumi Okihara, Shozo Murakami, Masayoshi Ohara, Akiyoshi Kawaguchi, Ken‐Ichi Katayama

    Journal of Polymer Science Part B: Polymer Physics   31 ( 7 )   843 - 852   1993年

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    記述言語:英語  

    Isotactic polypropylene (iPP) was crystallized from solution on a uniaxially‐oriented iPP film. Small‐angle x‐ray scattering patterns obtained from the sample showed two perpendicularly crossed lameliae 9.3 nm thick that overgrew flat‐on and edge‐on on the substrate. In the through wide‐angel x‐ray diffraction pattern (taken with incident x‐rays normal to the iPP film surface), strong hkO reflections were arranged in an hkO net pattern indicating that the a‐axis of the monoclinic α unit cell was oriented parallel to the chain direction of the substrate. From this, it was concluded that the flat‐on lamellae grew with the a‐axis parallel to the chain axis of the substrate and with the b‐axis parallel to its surface. In the edge wide‐angle x‐ray diffraction pattern (X‐rays incident on the edge of the film), arced, strong 110 and 220 reflections from overgrown crystals were observed on the equator of the fiber pattern of the substrate. This indicated that the edge‐on lamellae epitaxially grew with the c‐axis aligned parallel to the chain axis of the substrate. The homoepitaxy explains the correlated growth mode between the orthogonally crossed lamellae: they grew epitaxially, the a‐axis of one lamella coinciding with the c‐axis of the other and the {010} planes in contact. © 1993 John Wiley &amp
    Sons, Inc. Copyright © 1993 John Wiley &amp
    Sons, Inc.

    DOI: 10.1002/polb.1993.090310712

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  • Crystal Structure of Stereocomplex of Poly(L-lactide) and Poly(D-lactide)

    Takumi Okihara, Masaki Tsuji, Akiyoshi Kawaguchi, Ken-Ichi Katayama, Hideto Tsuji, Suong-Hyu Hyon, Yoshito Ikada

    Journal of Macromolecular Science, Part B   30 ( 1-2 )   119 - 140   1991年3月

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    記述言語:英語  

    An equimolar mixture of poly (L-lactide) and poly(D-lactide) was crystallized into a stereocomplex whose crystal system is triclinic (P1) with cell dimensions: a = 0.916 nm, b = 0.916 mm, c (chain axis) = 0.870 nm, a = 109.2°, β = 109.2°, and y = 109.8°. In the unit cell, a poly(L-lactide) segment and a poly (D-lactide) segment are contained as a pair and packed laterally in parallel fashion. The L- and D-poly(Iactides) in the complex take a 31helical conformation, which is a little extended from a 103 helix in the homopolymer crystal with the α-form. Homopolymers are also able to take the 31helical conformation and form the β-form crystal. The 31helix in the homopolymer crystal is less stable than the 103one, and hence the β-form is easily transformed to the a-form by annealing. © 1991, Taylor &amp
    Francis Group, LLC. All rights reserved.

    DOI: 10.1080/00222349108245788

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  • Crystal Structure of Stereocomplex of Poly(L-lactide) and Poly(D-lactide)

    Takumi Okihara, Masaki Tsuji, Akiyoshi Kawaguchi, Ken-Ichi Katayama, Hideto Tsuji, Suong-Hyu Hyon, Yoshito Ikada

    Journal of Macromolecular Science, Part B   30 ( 1-2 )   119 - 140   1991年3月

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    記述言語:英語  

    An equimolar mixture of poly (L-lactide) and poly(D-lactide) was crystallized into a stereocomplex whose crystal system is triclinic (P1) with cell dimensions: a = 0.916 nm, b = 0.916 mm, c (chain axis) = 0.870 nm, a = 109.2°, β = 109.2°, and y = 109.8°. In the unit cell, a poly(L-lactide) segment and a poly (D-lactide) segment are contained as a pair and packed laterally in parallel fashion. The L- and D-poly(Iactides) in the complex take a 31helical conformation, which is a little extended from a 103 helix in the homopolymer crystal with the α-form. Homopolymers are also able to take the 31helical conformation and form the β-form crystal. The 31helix in the homopolymer crystal is less stable than the 103one, and hence the β-form is easily transformed to the a-form by annealing. © 1991, Taylor &amp
    Francis Group, LLC. All rights reserved.

    DOI: 10.1080/00222349108245788

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  • Epitaxial growth of isotactic polypropylene on oriented polyethylene from solution

    Akiyoshi Kawaguchi, Takumi Okihara, Syozo Murakami, Masayoshi Ohara, Ken‐Ichi Katayama, Jürgen Petermann

    Journal of Polymer Science Part B: Polymer Physics   29 ( 6 )   683 - 690   1991年

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    記述言語:英語  

    Oriented polyethylene (PE) films with surfaces bounded by the (100) plane were prepared. On the film surfaces, isotactic polypropylene (iPP) was crystallized epitaxially from solution as quadrits with their sides parallel and perpendicular to the polyethylene chain axis. In the through wide‐angle x‐ray diffraction pattern (taken with incident x‐rays normal to the polyethylene film surface), the 111 iPP reflections was observed on the meridian (Parallel to the polyethylene chain axis). In the edge patterns (taken with x‐rays incident on the edge of the polyethylene film), 040 and 060 reflections were observed on the equator. From the diffraction patterns, the following lattice coincidence was observed between polyethylene and isotactic polypropylene: (010)iPP//(100) PE, [101]iPP//[001] PE. The Small‐angle x‐ray scattering patterns showed that edge‐on isotactic polypropylene lamellae 9 nm thick were arranged with their long axes inclined at an angle of 40° from the polyethylene axis. Molecular chains were oriented within the lamellae normal to the surfaces. Copyright © 1991 John Wiley &amp
    Sons, Inc.

    DOI: 10.1002/polb.1991.090290606

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  • Epitaxial growth of isotactic polypropylene on oriented polyethylene from solution

    Akiyoshi Kawaguchi, Takumi Okihara, Syozo Murakami, Masayoshi Ohara, Ken‐Ichi Katayama, Jürgen Petermann

    Journal of Polymer Science Part B: Polymer Physics   29 ( 6 )   683 - 690   1991年

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    記述言語:英語  

    Oriented polyethylene (PE) films with surfaces bounded by the (100) plane were prepared. On the film surfaces, isotactic polypropylene (iPP) was crystallized epitaxially from solution as quadrits with their sides parallel and perpendicular to the polyethylene chain axis. In the through wide‐angle x‐ray diffraction pattern (taken with incident x‐rays normal to the polyethylene film surface), the 111 iPP reflections was observed on the meridian (Parallel to the polyethylene chain axis). In the edge patterns (taken with x‐rays incident on the edge of the polyethylene film), 040 and 060 reflections were observed on the equator. From the diffraction patterns, the following lattice coincidence was observed between polyethylene and isotactic polypropylene: (010)iPP//(100) PE, [101]iPP//[001] PE. The Small‐angle x‐ray scattering patterns showed that edge‐on isotactic polypropylene lamellae 9 nm thick were arranged with their long axes inclined at an angle of 40° from the polyethylene axis. Molecular chains were oriented within the lamellae normal to the surfaces. Copyright © 1991 John Wiley &amp
    Sons, Inc.

    DOI: 10.1002/polb.1991.090290606

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  • Substrate-induced crystallization of n-paraffins on oriented polyolefins

    Akiyoshi Kawaguchi, Takumi Okihara, Masayoshi Ohara, Masaki Tsuji, Ken-ichi Katayama, Jürgen Petermann

    Journal of Crystal Growth   94 ( 4 )   857 - 870   1989年

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    記述言語:英語  

    n-Paraffins of n-C20H42 to n-C50 H102 were epitaxially crystallized on oriented polyolefins
    polyethylene, polypropylene, poly-1-butene and poly-4-methyl-1-pentene. In most cases, n-paraffin crystals were epitaxially grown on the substrate surface with the (001) basal plane parallel to it, maintaining a two-dimensional lattice coincidence with the polymer substrate. The epitaxial modes with this orientation were classified into the following three types irrespective of the polymers: 1. (1) (001)p{norm of matrix}SS, 〈110〉p{norm of matrix}FA, 2. (2) (001)p{norm of matrix}SS, [010]p{norm of matrix}FA, 3. (3) (001)p{norm of matrix}SS, 〈110〉 p $ ̊ $ ̌gaFA, where p, SS and FA denote n-paraffin crystals, substrate surface and fiber axis of the polymers, respectively. The angle α depends on the kind of polymer substrate. n-Paraffins longer than n-C40H82 were laid down in parallel on the polypropylene substrate with their axes at a 46° angle with respect to the substrate fiber axis. © 1989.

    DOI: 10.1016/0022-0248(89)90118-8

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  • Substrate-induced crystallization of n-paraffins on oriented polyolefins

    Akiyoshi Kawaguchi, Takumi Okihara, Masayoshi Ohara, Masaki Tsuji, Ken-ichi Katayama, Jürgen Petermann

    Journal of Crystal Growth   94 ( 4 )   857 - 870   1989年

     詳細を見る

    記述言語:英語  

    n-Paraffins of n-C20H42 to n-C50 H102 were epitaxially crystallized on oriented polyolefins
    polyethylene, polypropylene, poly-1-butene and poly-4-methyl-1-pentene. In most cases, n-paraffin crystals were epitaxially grown on the substrate surface with the (001) basal plane parallel to it, maintaining a two-dimensional lattice coincidence with the polymer substrate. The epitaxial modes with this orientation were classified into the following three types irrespective of the polymers: 1. (1) (001)p{norm of matrix}SS, 〈110〉p{norm of matrix}FA, 2. (2) (001)p{norm of matrix}SS, [010]p{norm of matrix}FA, 3. (3) (001)p{norm of matrix}SS, 〈110〉 p $ ̊ $ ̌gaFA, where p, SS and FA denote n-paraffin crystals, substrate surface and fiber axis of the polymers, respectively. The angle α depends on the kind of polymer substrate. n-Paraffins longer than n-C40H82 were laid down in parallel on the polypropylene substrate with their axes at a 46° angle with respect to the substrate fiber axis. © 1989.

    DOI: 10.1016/0022-0248(89)90118-8

    Scopus

    researchmap

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講演・口頭発表等

  • カーボンナノチューブを粒界に偏在させた超高分子量ポ リエチレン複合材料の物性

    山本大智, 宮前和貴, 沖原 巧

    プラスチック成形加工学会第29回秋季大会  2021年11月30日  プラスチック成形加工学会

     詳細を見る

    開催年月日: 2021年11月30日 - 2021年12月1日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    P-66

  • 多層カーボンナノチューブを粒界に局在化させた超高分子量ポリエチレン複合材料の物性評価

    山本大智, 宮前和貴, 沖原 巧

    第36回中国四国地区高分子若手研究会  2021年11月5日  高分子学会中国四国支部

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    開催年月日: 2021年11月4日 - 2021年11月5日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    PC03

  • エチレン-ビニルアルコール共重合体リン酸化物の生分解性評価と機能材料化

    黒崎宗治, 沖原 巧, 岸本幸大

    第36回中国四国地区高分子若手研究会  2021年11月4日  高分子学会中国四国支部

     詳細を見る

    開催年月日: 2021年11月4日 - 2021年11月5日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    PB03

  • リン酸化多糖の物性を利用した新規ドラッグデリバリーシステムに関する研究

    浅埜華穂, 沖原 巧

    第36回中国四国地区高分子若手研究会  2021年11月4日  高分子学会中国四国支部

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    開催年月日: 2021年11月4日 - 2021年11月5日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    PA03

  • 層間化合物を利用した再充填可能な抗菌剤徐放コーテ ィングの開発

    松尾健哉, 亀山武尊, 沖原 巧

    第70回高分子討論会  2021年9月6日 

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    開催年月日: 2021年9月6日 - 2021年9月8日

    記述言語:日本語   会議種別:ポスター発表  

    1Pf054

  • モンモリロナイト層間化合物によるリフィル型徐放担体を利用した抗菌コーティング材の開発

    松尾健哉, 亀山武尊, 沖原 巧

    第59回日本接着学会年次大会  2021年6月24日  日本接着学会

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    開催年月日: 2021年6月24日 - 2021年6月25日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    P41A

  • 多層カーボンナノチューブを粒界に局在化させた超高分子量ポリエチレンの熱機械物性の評価

    山本大智, 宮前和貴, 沖原 巧

    第59回日本接着学会年次大会  2021年6月24日  日本接着学会

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    開催年月日: 2021年6月24日 - 2021年6月25日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    P10B

  • 炭素繊維および多層カーボンナノチューブで強化した PEEK 複合材料の熱および⼒学物性

    高 田 善機、沖原 巧、大澤(八木) 恭子、森山 茂章、青木 薫、西村 直之、齋藤 直人

    プラスチック成形加工学会第32回年次大会  2021年6月17日  プラスチック成形加工学会

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    開催年月日: 2021年6月16日 - 2021年6月17日

    開催地:オンライン  

    P-17

  • リン酸化プルラン‐界面活性剤複合体からの薬剤徐放メカ ニズムの解明

    浅埜華穂, 沖原 巧

    第70回高分子学会年次大会  2021年5月28日  高分子学会

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    開催年月日: 2021年5月26日 - 2021年5月28日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    3Pc073

  • エチレンビニルアルコール共重合体リン酸化物の材料物性

    黒崎宗治, 岸本幸大, 沖原 巧

    第70回高分子学会年次大会  2021年5月27日  高分子学会

     詳細を見る

    開催年月日: 2021年5月26日 - 2021年5月28日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    2Pe045

  • 炭素系材料の複合的強化による PEEK 複合材の開発

    高田善機, 山本大智, 沖原 巧

    第70回高分子学会年次大会  2021年5月27日  高分子学会

     詳細を見る

    開催年月日: 2021年5月26日 - 2021年5月28日

    記述言語:日本語   会議種別:ポスター発表  

    開催地:オンライン  

    2Pe077

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産業財産権

  • リン酸化プルランの製造方法

    沖原 巧

     詳細を見る

    出願人:岡山大学

    出願番号:特願2021-114917  出願日:2021年7月12日

  • 表面処理された芳香族ポリエーテルエーテルケトンを含むインプラント材料およびその製造方法

    沖原 巧,高田善機,斎藤直人,青木 薫,西村直之,羽二生 久夫,森山茂章,上田勝也

     詳細を見る

    出願人:信州大学、岡山大学、福岡大学

    出願番号:特願2019-066485  出願日:2019年3月29日

  • 生体吸収性シート又はフィルム

    吉田靖弘、松川昭博、沖原 巧

     詳細を見る

    出願番号:特願2019-207022  出願日:2017年3月8日

    特許番号/登録番号:6964312  登録日:2021年10月21日 

受賞

  • JEMEAベストペーパー賞

    2018年1月   日本電磁波エネルギー応用学会  

    沖原 巧

     詳細を見る

  • 第21回ポリマー材料フォーラム優秀発表賞

    2013年   高分子学会  

    沖原 巧

     詳細を見る

 

担当授業科目

  • 化学生命系英語 (2021年度) 1・2学期  - 水3,水4

  • 化学生命系英語1 (2021年度) 第1学期  - 水3,水4

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  • 基礎化学実験 (2021年度) 1・2学期  - 月5,月6,月7,月8

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  • 基礎化学実験 (2021年度) 1・2学期  - 木5,木6,木7,木8

  • 実践応用化学 (2021年度) 前期  - その他

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  • 専門英語1 (2021年度) 第3学期  - 木3,木4

  • 専門英語2 (2021年度) 第4学期  - 木3,木4

  • 応用化学ゼミナール1 (2021年度) 前期  - その他

  • 応用化学ゼミナール2 (2021年度) 後期  - その他

  • 応用化学特別研究 (2021年度) 通年  - その他

  • 現代化学 (2021年度) 第4学期  - 月3~4

  • 高分子・生体材料学 (2021年度) 第4学期  - 木1,木2,金1,金2

  • 高分子化学 (2021年度) 第2学期  - 月1,月2,水1,水2

  • 高分子材料学 (2021年度) 前期  - 火3,火4

  • 高分子材料学 (2021年度) 前期  - その他

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  • 高分子物性化学 (2021年度) 第4学期  - 木1,木2

  • 化学生命系英語 (2020年度) 1・2学期  - 水3,水4

  • 化学生命系英語1 (2020年度) 第1学期  - 水3,水4

  • 化学生命系英語2 (2020年度) 第2学期  - 水3,水4

  • 基礎化学実験 (2020年度) 1・2学期  - 月5,月6,月7,月8

  • 基礎化学実験 (2020年度) 1・2学期  - 木4,木5,木6,木7

  • 基礎化学実験 (2020年度) 1・2学期  - 月5,月6,月7,月8

  • 基礎化学実験 (2020年度) 1・2学期  - 木4,木5,木6,木7

  • 実践応用化学 (2020年度) 前期  - その他

  • 専門英語 (2020年度) 3・4学期  - 木3,木4

  • 専門英語1 (2020年度) 第3学期  - 木3,木4

  • 専門英語2 (2020年度) 第4学期  - 木3,木4

  • 応用化学ゼミナール1 (2020年度) 前期  - その他

  • 応用化学ゼミナール2 (2020年度) 後期  - その他

  • 応用化学特別研究 (2020年度) 通年  - その他

  • 現代化学2 (2020年度) 第4学期  - 月3,月4

  • 高分子・生体材料学 (2020年度) 第4学期  - 木1,木2,金1,金2

  • 高分子化学 (2020年度) 第2学期  - 月1,月2,水1,水2

  • 高分子材料学 (2020年度) 前期  - 火3,火4

  • 高分子材料学 (2020年度) 前期  - その他

  • 高分子材料学演習 (2020年度) 通年  - その他

  • 高分子物性化学 (2020年度) 第4学期  - 木1,木2

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