2025/04/17 更新

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写真a

シンモリ ヒロノリ
新盛 弘法
SHINMORI HIRONORI
所属
工学研究院 機械工学部門 助教
工学府 機械工学専攻(併任)
職名
助教
連絡先
メールアドレス
電話番号
0928023074
プロフィール
主にポリマー(樹脂,ゲル)のトライボロジーについて研究 ・生体環境におけるポリマー材料のしゅう動特性 ・ハイドロゲルを用いた関節軟骨の潤滑メカニズムの解明 ・水潤滑下での樹脂複合材のしゅう動特性 ・高純度水素ガス雰囲気における樹脂複合材のトライボロジー
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研究分野

  • ものづくり技術(機械・電気電子・化学工学) / 機械要素、トライボロジー

学位

  • 博士(工学)

論文

  • On the replacement of articular cartilage: The friction of PVA hydrogel layer in hip simulator test

    Necas, D; Yarimitsu, S; Rebenda, D; Shinmori, H; Vrbka, M; Sawae, Y; Murakami, T; Krupka, I

    TRIBOLOGY INTERNATIONAL   178   2023年2月   ISSN:0301-679X eISSN:1879-2464

     詳細を見る

    出版者・発行元:Tribology International  

    The present study focuses on friction evaluation of the polyvinyl alcohol (PVA) hydrogel layer, an anticipative material for cartilage replacement. The experiments were carried out in a ball-in-socket configuration using a pendulum hip simulator. The friction coefficients of ceramic-on-hydrogel pairs were compared with those of commercial implants (metal/ceramic heads vs UHMWPE, HXPE and metal/ceramic sockets). The effects of hydrogel ageing and hydration were studied, among others. The use of PVA inserts caused up to 98% reduction in friction coefficient compared to original hip pairs. The application of PVA for local or even complete cartilage replacement seems to be an outstanding opportunity in implantology.

    DOI: 10.1016/j.triboint.2022.108100

    Web of Science

    Scopus

  • 高含水ソフトマターと関節液成分の協調による低摩擦発現メカニズム

    中原 朋希, 澤江 義則, 鎗光 清道, 新盛 弘法

    年次大会   2023 ( 0 )   J113p-10   2023年   eISSN:24242667

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    記述言語:日本語   出版者・発行元:一般社団法人 日本機械学会  

    <p>The purpose of this study is to elucidate the boundary lubrication mechanism of the cooperation of hyaluronic acid (HA) and phospholipids (DPPC) between articular cartilages. As the cartilage tissue model, polyvinyl alcohol (PVA) hydrogel, which has similar water content and elasticity. PVA hydrogel was prepared as follows; PVA powder was solved into deionized water completely, then set in an environmental tester for repeat freezing and thawing to grow physical crosslinks. A rotational rheometer was used for the friction test since this apparatus could realize the evaluation in wide sliding velocity, between 10<sup>-5</sup> to 10<sup>3</sup> mm/s. As a result, characteristic frictional behavior was observed, friction coefficient increased in the boundary lubrication range with sliding velocity. Comparing PBS, adding HA and DPPC changed the friction behavior. Especially, 0.02wt% of DPPC solution indicated a significant friction reduction, with or without HA. And in the case of 0.01wt% of DPPC, friction decreased with HA concentration. These results implied that the roles of HA and DPPC for the friction were different and the appropriate ratio of them would exist to minimize friction.</p>

    DOI: 10.1299/jsmemecj.2023.j113p-10

    CiNii Research

  • Effects of surface wettability and thermal conductivity on the wear performance of ultrahigh molecular weight polyethylene/graphite and ultrahigh molecular weight polyethylene/graphene oxide composites

    Shahemi, NH; Liza, S; Sawae, Y; Morita, T; Shinmori, H; Yaakob, Y

    POLYMERS FOR ADVANCED TECHNOLOGIES   33 ( 6 )   1916 - 1932   2022年6月   ISSN:1042-7147 eISSN:1099-1581

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    出版者・発行元:Polymers for Advanced Technologies  

    Recent studies have found a rapid increase of ultrahigh molecular weight polyethylene (UHMWPE) wear in the presence of proteins from the synovial fluid. Due to UHMWPE's high hydrophobicity, it tends to adsorb a tremendous amount of proteins. Moreover, since UHMWPE has low thermal conductivity, a temperature rise in the center of the contact area due to frictional heating could cause protein denaturation from the synovial fluid. It has been shown that the denatured protein may increase the adhesive wear response. This study aimed to address the effects of graphite and graphene oxide (GO) addition on the wear properties of UHMWPE in protein environments. The surface properties were characterized using surface roughness profiler, surface energy evaluation, zeta potential, and Fourier transform infra-red (FTIR). Following that, wear properties of UHMWPE composite were evaluated using a multidirectional pin-on-disc wear test under a bovine serum lubricated condition. The worn surface of the UHMWPE composite sample was evaluated, and the dominating factors of wear properties were determined. The effect of protein adsorption on the composite surface was also assessed after the wear test. The hydrophilicity of UHWMPE/1.0GO is considered to be the dominant contribution determining protein adsorption in static conditions. UHMWPE composite's wear resistance improvement was primarily dominated by GO filler (1.0 wt%) near the sliding surface, which has improved the subsurface strength of the material and heat dissipation effect, which reduces the denaturation of the proteins.

    DOI: 10.1002/pat.5651

    Web of Science

    Scopus

  • Epoxy (SU-8) polymer composites with Ultra-high molecular weight polyethylene and Hyaluronic acid fillers for hip prosthetic implant application

    Hirwani, JK; Nishimura, R; Shinmori, H; Morita, T; Sawae, Y; Sinha, SK

    TRIBOLOGY INTERNATIONAL   167   2022年3月   ISSN:0301-679X eISSN:1879-2464

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    出版者・発行元:Tribology International  

    Inclusion of 25 wt% of UHMPWE particles to SU-8 improved the tribological properties and restricted crack propagation within the matrix. Further adding 0.2 wt% and 0.5 wt% of hyaluronic acid (HA) reduced friction and wear. Worn surface morphology revealed that the HA-filled composite has less damage and smoother appearance than the composite without HA. The phenomenon of HA lubrication was attributed to the lubricating film formation ability of HA. Also, HA induced hardness has positively influenced the wear rate of SU-8 composites. These promising results of SU-8/UHMWPE/HA composites make them potential candidate as future hip implant material.

    DOI: 10.1016/j.triboint.2021.107399

    Web of Science

    Scopus

  • Effects of synovial fluid constituents on friction between UHMWPE and CoCrMo 査読

    Shinmori, H.; Kubota, M.; Morita, T.; Yamaguchi, T.; Sawae, Y.

    Tribology Online   15 ( 4 )   2020年9月   ISSN:1881-2198

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    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)  

    DOI: https://doi.org/10.2474/trol.15.283

共同研究・競争的資金等の研究課題

  • 高含水ソフトマターと糖・蛋白・脂質の協調による体内超潤滑メカニズムの解明

    研究課題/領域番号:21H04535  2021年4月 - 2025年3月

    科学研究費助成事業  基盤研究(A)

    澤江 義則, 山口 哲生, 坂井 伸朗, 中嶋 和弘, 鎗光 清道, 新盛 弘法, 森田 健敬

      詳細を見る

    資金種別:科研費

    生体関節の摩擦面を形成する関節軟骨を,多くの水を内部に含み特徴的な 動的摩擦挙動を示す「高含水ソフトマター」と捉え,これが体内に存在する糖・蛋白・脂 質と協調しながら,生体関節の極めて滑らかな動作を可能とする超潤滑システムとして機能するメカニズムを探求する.ここでは,細胞を播種したアガロースゲルを軟骨組織の生きた物理モデルとし,その動的摩擦挙動から摩擦低減メカニズムを実験的に検証する.また実験により捉えられた現象を有限要素モデルと数理モデルを用いて解析することにより,その詳細メカニズムを解明するとともに,現象を支配する物理パラメータを抽出し,工学 技術として応用することを目指す.

    CiNii Research

教育活動に関する受賞

  • 学生奨励賞

    2023年1月   日本トライボロジー学会  

  • 日本機械学会三浦賞

    2020年3月   日本機械学会