Affiliation |
Faculty of Environment and Information Sciences, Division of Artificial Environment and Information |
Job Title |
Associate Professor |
Date of Birth |
1991 |
Research Fields, Keywords |
Tribology, 高分子・超分子, レオロジー, 界面科学, ポリマーブラシ, マテリアルリサイクル, セルロースナノファイバー, マルチモーダル計測, オペランド計測 |
Mail Address |
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Web Site |
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Related SDGs |
OKUBO Hikaru
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The Best Research Achievement in Research Career 【 display / non-display 】
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【Published Thesis】 Layered Structure and Wear Mechanism of Concentrated Polymer Brushes(LANGMUIR) 2023.12
【Published Thesis】 Novel Environmentally Superior Tribomaterial with Superlow Friction: 100% Cellulose Nanofiber Molding(TRIBOLOGY LETTERS) 2023.09
【Published Thesis】 Operando tribo-Raman spectroscopic observation for wear processes of superlow frictional concentrated polymer brushes at frictional interface 2023.09
The Best Research Achievement in the last 5 years 【 display / non-display 】
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【Published Thesis】 Layered Structure and Wear Mechanism of Concentrated Polymer Brushes(LANGMUIR) 2023.12
【Published Thesis】 Novel Environmentally Superior Tribomaterial with Superlow Friction: 100% Cellulose Nanofiber Molding(TRIBOLOGY LETTERS) 2023.09
【Published Thesis】 Operando tribo-Raman spectroscopic observation for wear processes of superlow frictional concentrated polymer brushes at frictional interface 2023.09
Education 【 display / non-display 】
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2016.4-2019.3
Tokyo University of Science Doctor Course Accomplished credits for doctoral program
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2014.4-2016.3
Tokyo University of Science Master Course Completed
Degree 【 display / non-display 】
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Doctor of Engineering - Tokyo University of Science
Campus Career 【 display / non-display 】
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2025.4
Duty Yokohama National UniversityFaculty of Environment and Information Sciences Division of Artificial Environment and Information Associate Professor
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2022.4-2025.3
Duty Yokohama National UniversityFaculty of Environment and Information Sciences Division of Artificial Environment and Information Assistant Professor
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2025.4
Concurrently Yokohama National UniversityGraduate School of Environment and Information Sciences Department of Artificial Environment Associate Professor
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2025.4
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Mechanical Engineering, Materials Science and Ocean Engineering Associate Professor
External Career 【 display / non-display 】
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2024.10
Researcher
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2023.10
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2022.4
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2021.3-2022.3
Assistant Professor
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2020.8-2021.3
Assistant Professor
Academic Society Affiliations 【 display / non-display 】
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2014.7
日本トライボロジー学会
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2021.7
セルロース学会
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2020.7
高分子学会
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2014.7
日本機械学会
Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Machine elements and tribology / Tribology
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Mechanics of materials and materials
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Nanotechnology/Materials / Polymer materials
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Life Science / Wood science / セルロースナノファイバー
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Environmental Science/Agriculture Science / Sound material-cycle social systems / マテリアルリサイクル
Books 【 display / non-display 】
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プラスチックのリサイクルと再生材の改質技術
大久保光( Role: Contributor)
情報技術協会
Total pages:621 Language:Japanese Book type:Scholarly book
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数値解析と表面分析によるトライボロジーの解明と制御
佐々木 信也他( Role: Contributor)
株式会社テクノシステム
Language:Japanese Book type:Scholarly book
Thesis for a degree 【 display / non-display 】
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Tribochemical interactions of diamond-like carbon films and lubricants under boundary lubrication
Hikaru Okubo
2019.9
Doctoral Thesis Single Work
Papers 【 display / non-display 】
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Hatanaka, S; Ogawa, Y; Okubo, H; Hanzawa, K; Kajiki, R; Yamaguchi, K; Nakano, K
WEAR 562-563 2025.2 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Tamamoto, K; Kinose, Y; Okubo, H; Nakano, K; Tsujii, Y
COMMUNICATIONS MATERIALS 6 ( 1 ) 2025.2 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Okubo, H; Hase, K; Tamamoto, K; Tsujii, Y; Nakano, K
TRIBOLOGY LETTERS 72 ( 3 ) 2024.9 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Okubo Hikaru, Ishikawa Tomori, Hashiba Hiromi, Inamochi Toru, Nakano Ken
Frontiers of Mechanical Engineering 10 2024.7 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Publisher:HIGHER EDUCATION PRESS Joint Work
This paper reports the thermally activated ultralow friction of 100% cellulose nanofiber (CNF) molding. The mechanism of friction reduction was investigated using a laboratory-built in-situ Raman tribometer. Our experimental results showed that a CNF molding exhibited an ultralow friction coefficient of below 0.04 in a CNF ring and steel disk tribopair under high-temperature conditions (T > 100°C). The results of the temperature-rise friction test showed that the friction coefficient of the CNF molding strongly depended on the temperature and decreased linearly with increasing temperature. The in situ tribo-Raman monitoring results, during friction, indicated a change in the structure of the CNF molding. Therefore, the crystallinity indices and lengths of the CNF fibers gradually changed as the temperature increased. Moreover, transfer tribofilms were observed on the counter-steel surface against the CNF rings. When the CNF molding exhibited thermally activated ultralow friction, the tribofilm was mainly composed of cellulose and graphitic carbon. Our results suggest that the thermal and friction-activated structural transformations of CNF molding and CNF-derived transfer film formation are pivotal factors contributing to the ultralow friction phenomenon observed in CNF molding at high temperatures.
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Layered Structure and Wear Mechanism of Concentrated Polymer Brushes
Okubo, H; Kagiwata, D; Nakano, K; Tsujii, Y
LANGMUIR 39 ( 50 ) 18458 - 18465 2023.12 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
Review Papers 【 display / non-display 】
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Editorial: Visualization techniques in tribology
Taisuke Maruyama, Satoru Maegawa, Hikaru Okubo, Thomas Reddyhoff, Sorin-Cristian Vlădescu
JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS 2025.3 [Reviewed] [Invited]
Language:English Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Single Work
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Atomic Force Microscopy for In-Situ Measurement of Solid-Liquid Interface Structures and Tribo-Films on Sliding Surface
2024.12 [Reviewed] [Invited]
Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Single Work
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Research Trends of Concentrated Cellulose Nanofiber Molding
Hikaru Okubo
JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS 69 ( 11 ) 734 - 740 2024.11 [Reviewed] [Invited]
Authorship:Lead author, Last author, Corresponding author Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Single Work
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周波数変調原子間力顕微鏡を用いた薄膜評価技術
大久保光
月刊トライボロジー 466 ( 1 ) 2024.1
Authorship:Lead author, Last author, Corresponding author Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Single Work
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超低摩擦-環境調和性を兼備した100%セルロースナノファイバー成型体のナノエンジニアリング
大久保光
材料 72 ( 9 ) 2023.9 [Reviewed] [Invited]
Authorship:Lead author, Last author, Corresponding author Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Single Work
Industrial Property Rights 【 display / non-display 】
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氷核形成抑制または着氷抑制用の部材
中野健, 大久保光他
Application no:2023-085782 Date applied:2023.5.24
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摺動部材及びその製造方法
大久保光 , 橋場洋美 , 稲用亨 , 中込亮太 , 射場大輔
Application no:2022132916 Date applied:2022.9.10
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高機能ペレットの作成方法
八尾滋,大久保光
Application no:202186982 Date applied:2021.5
Awards 【 display / non-display 】
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文部科学大臣表彰 若手科学者賞
2025.4 文部科学省 超低摩擦材料の潤滑機構の解明と新機能開拓に関する研究
Individual or group name of awards:大久保光
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日本機械学会奨励賞(研究)
2025.4 日本機械学会 超低摩擦材料の潤滑機構の解明と新機能開拓に関する研究
Individual or group name of awards:大久保光
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横浜国立大学優秀研究者賞
2025.3 横浜国立大学
Individual or group name of awards:大久保光
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日本トライボロジー学会 2023年度 論文賞
2024 日本トライボロジー学会
Individual or group name of awards:大久保光
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Tribology Letters Editors’ Selections 2023
2023 Tribology Letters Novel Environmentally Superior Tribomaterial with Superlow Friction: 100% Cellulose Nanofiber Molding
Individual or group name of awards:Hikaru Okubo , Hiromi Hashiba , Toru Inamochi , Kaisei Sato , Shinya Sasaki , Kazushi Yamada , Ken Nakano
Grant-in-Aid for Scientific Research 【 display / non-display 】
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マルチモーダル動的界面計測による高濃度ナノセルロース成型体の超潤滑機構の解明
Grant number:24K17195 2024.4 - 2026.3
日本学術振興会 Grant-in-Aid for Early-Career Scientists
Investigator(s):大久保光
Authorship:Principal investigator Grant type:Competitive
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SRT材料の潤滑機構の階層的な理解と新機能開拓
Grant number:JPMJAX23D4 2023.9 - 2026.3
文部科学省 戦略的創造研究推進事業 ACT-X
Investigator(s):大久保光
Authorship:Principal investigator Grant type:Competitive
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超分子のホスト-ゲスト相互作用による自己修復-超低摩擦型トライボシステムの創製
Grant number:22K14169 2022.4 - 2024.3
日本学術振興会 Grant-in-Aid for Early-Career Scientists
Authorship:Principal investigator
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摩擦界面のその場観察による100%セルロースナノファイバー成形体の潤滑機構の解明
Grant number:21K20402 2021.4 - 2023.3
日本学術振興会 Grant-in-Aid for Research Activity start-up
Authorship:Principal investigator Grant type:Competitive
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潤滑下におけるDLCの超低摩擦発現メカニズム解明のためのその場複合解析装置の開発
Grant number:16J09043 2016.4 - 2019.3
日本学術振興会 Grant-in-Aid for JSPS Fellows
Other external funds procured 【 display / non-display 】
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超高速摩擦界面を可視化するオペランド電気化学インピーダンス計測基盤の構築
2024.10 - 2026.3
Private Foundations
Authorship:Principal investigator
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ソフト界面のための表面増強マルチモーダル・オペランド顕微鏡の開発
2024.10 - 2025.3
Local Government 神奈川県まち・ひと・しごと創生基金科学技術政策大綱推進事業 次世代人材の研究能力開発支援等事業
Authorship:Principal investigator
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100%ナノセルロース成型体の超潤滑機構の解明と環境対応型摺動材料の創製
2024.4 - 2026.3
Private Foundations 公益財団法人 服部報公会
Authorship:Principal investigator
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100%ナノセルロース成型体の超潤滑機構の解明とバイオマス摺動システムの創製
2024.4 - 2025.3
Private Foundations 藤森科学技術振興財団
Investigator(s):大久保光
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オペランド分光分析に基づくエチレン・ブチレン分子相溶型自己修復性エラストマーのパッケージング応用に向けた基礎研究
2023.4 - 2024.3
Private Foundations 2023年度 フジシール財団研究助成
Authorship:Principal investigator
Presentations 【 display / non-display 】
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マルチモーダル同時計測に基づく 超低摩擦ポリマーブラシの層構造と潤滑機構の理解
大久保光 [Invited]
理化学研究所 テクニスト・マイクロ合同研究会
Event date: 2025.4
Language:Japanese Presentation type:Oral presentation (invited, special)
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マルチモーダル同時計測に基づく 超低摩擦ポリマーブラシの層構造と潤滑機構の理解
大久保光
第54回伸長プロセス専門委員会
Event date: 2025.3
Language:Japanese Presentation type:Oral presentation (invited, special)
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原子間力顕微鏡による 再生プラスチックの高次構造計測
大久保光
革新的プラスチックマテリアルリサイクルシンポジウム 国立研究開発法人 新エネルギー・産業技術総合開発機構
Event date: 2025.3
Language:Japanese Presentation type:Oral presentation (invited, special)
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原子間力顕微鏡による再生高分子の高次構造計測
大久保光 [Invited]
廃プラスチックの高度物性再生の開発技術者養成に係る特別講座 国立研究開発法人 新エネルギー・産業技術総合開発機構
Event date: 2025.2
Language:Japanese Presentation type:Oral presentation (invited, special)
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マルチモーダル同時計測に基づく ポリマーブラシの階層構造と潤滑機構の理解
大久保光 [Invited]
2024年度第2回トライボケミストリー研究会
Event date: 2025.1
Language:Japanese Presentation type:Oral presentation (invited, special)
Preferred joint research theme 【 display / non-display 】
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トライボロジー
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その場計測による力学現象の機構解明
Past of Collaboration and Commissioned Research 【 display / non-display 】
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ソフト界面のための表面増強・マルチモーダル顕微鏡の開発
Funded Research offered by Enterprises
Project Year: 2024.10 - 2025.3
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カテーテルコーティングの潤滑機構の解明
Funded Research offered by Enterprises
Project Year: 2024.9 - 2025.3
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圧縮機摺動部品の低摩擦化に関する研究
Funded Research offered by Enterprises
Project Year: 2024.4 - 2025.4
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セルロースナノファイバー成型体のトライボロジー応用技術の基盤確立
Funded Research offered by Enterprises
Project Year: 2022.9 - 2024.9
Charge of on-campus class subject 【 display / non-display 】
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2025 トライボロジー概論
Faculty of Environment and Information Sciences Division of Artificial Environment and Information
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2025 機械材料Ⅰ
College of Engineering Science Department of Mechanical Engineering, Materials Science and Ocean Engineering Mechanical Engineering Program
Charge of off-campus class subject 【 display / non-display 】
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機械工学実験Ⅰ
Institution:京都工芸繊維大学
Level:Undergraduate (specialized)
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機械製図法Ⅰ
Institution:京都工芸繊維大学
Level:Undergraduate (specialized)
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機械製図法Ⅱ
Institution:京都工芸繊維大学
Level:Undergraduate (specialized)
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機械加工法及び実習
Institution:京都工芸繊維大学
Level:Undergraduate (specialized)
Committee Memberships 【 display / non-display 】
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トライボロジー会議春2025春 実行委員
2024.5
Committee type:Academic society
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トライボロジー学会 秋の学校 実行委員
2024.2
Committee type:Academic society
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日本トライボロジー学会 日本トライボロジー学会・編集出版委員
2023.4 校閲幹事
Committee type:Academic society
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トライボロジー会議春2024春 実行委員
2023.4 - 2024.5 ワーキンググループ長
Committee type:Academic society
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トライボロジー会議春2023春 実行委員
2022.4
Committee type:Academic society
Social Contribution(Extension lecture) 【 display / non-display 】
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廃プラスチックの高度物性再生の開発技術者養成に係る特別講座
Role(s): Lecturer
2025.1