Affiliation |
Faculty of Environment and Information Sciences, Division of Artificial Environment and Information |
Job Title |
Assistant Professor |
Date of Birth |
1991 |
Research Fields, Keywords |
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, Tribology |
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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2022.4
Duty Yokohama National UniversityFaculty of Environment and Information Sciences Division of Artificial Environment and Information Assistant 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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Okubo, H; Hase, K; Tamamoto, K; Tsujii, Y; Nakano, K
TRIBOLOGY LETTERS 72 ( 3 ) 2024.9
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
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
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Hikaru Okubo , Daiki Kagiwata , Shinya Sasaki , Yoshinobu Tsujii , Ken Nakano
127 2023.9 [Reviewed]
Authorship:Lead author, Corresponding author Language:English Publishing type:Research paper (scientific journal) Joint Work
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Okubo Hikaru, Hashiba Hiromi, Inamochi Toru, Sato Kaisei, Sasaki Shinya, Yamada Kazushi, Nakano Ken
TRIBOLOGY LETTERS 71 ( 3 ) 2023.9 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
Review Papers 【 display / non-display 】
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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
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解析編 可視化技術への導入
大久保光
トライボロジスト 68 ( 8 ) 541 - 543 2023.8 [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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次世代マテリアルリサイクルシステムの構築に向けた廃棄プラスチックの高度物性再生技術の創出
大久保光,八尾滋
月間ソフトマター 2023.4
Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Single Work
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ダイヤモンドライクカーボン膜のトライボロジー特性に及ぼす潤滑油の効果
大久保光
メカニカル・サーフェス・テック 2022.12
Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) 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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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
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日本トライボロジー学会 2021年度 論文賞
2022 日本トライボロジー学会 In Situ Raman-SLIM Monitoring for the Formation Processes of MoDTC and ZDDP Tribofilms at Steel/Steel Contacts under Boundary Lubrication
Individual or group name of awards:大久保光
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環境革命賞
2021 株式会社リバネス
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 奨励賞 日本トライボロジー学会
2020 日本トライボロジー学会
Individual or group name of awards:大久保光
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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濃厚ポリマーブラシの固液界面構造と潤滑機構
大久保光 [Invited]
第22回境界潤滑研究会 日本トライボロジー学会 境界潤滑研究会
Event date: 2023.12
Language:Japanese Presentation type:Oral presentation (invited, special)
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再生プラスチックの力学物性と高次構造
大久保光 [Invited]
プラスチック成型加工学会・環境・リサイクル専門委員会 シンポジウム2023 2023.10
Event date: 2023.10
Language:Japanese Presentation type:Oral presentation (invited, special)
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Superlow frictional and environmentally superior tribomaterial: 100% cellulose nanofiber molding
International Tribology Conference, Fukuoka 2023
Event date: 2023.9
Language:English Presentation type:Oral presentation (general)
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Operando-Raman Observation for Frictional Interface Structure of Concentrated Polymer Brushes
International Tribology Conference, Fukuoka 2023 2023.9
Event date: 2023.9
Language:English Presentation type:Oral presentation (general)
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超潤滑性SRT 材料の潤滑機構と新たな環境適合型SRT 材料の提案
大久保光 [Invited]
東海トライボロジー研究会(第113回)
Event date: 2023.7
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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2024 機械系の実験・演習Ⅱ
College of Engineering Science Department of Mechanical Engineering and Materials Science Specializaiton in Mechanical Engineering
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2024 機械系の実験・演習Ⅰ
College of Engineering Science Department of Mechanical Engineering and Materials Science Specializaiton in Mechanical Engineering
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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トライボロジー学会 秋の学校 2024 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 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
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成形プラスチック成型加工学会・環境・リサイクル専門委員会 幹事
2022.4 幹事
Committee type:Academic society