2022 Fiscal Year Final Research Report
Challenges to defect-free strong single-walled carbon nanotube bundles and sizing up technologies
| Project/Area Number |
21K18783
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 24:Aerospace engineering, marine and maritime engineering, and related fields
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| Research Institution | Kyoto University of Advanced Science |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
三宅 修吾 神戸市立工業高等専門学校, その他部局等, 教授 (60743953)
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| Project Period (FY) |
2021-07-09 – 2023-03-31
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| Keywords | 無欠陥単層カーボンナノチューブ / バンドル化 / 強度維持 / 高強度化 / サイズアップ / エンジニアリング材料 |
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| Outline of Final Research Achievements |
In this study, multiple defect-free single-walled CNTs were artificially bundled, and a MEMS-assisted intra-SEM strength measurement system was used to quantitatively measure the bond strength at the interface of the single-walled CNT bundle. We demonstrated that the strength could be maintained by bundling defective single-walled CNTs. Specifically, we succeeded in maintaining the strength by bundling two defect-free single-walled CNTs without introducing defects by van der Waals forces. In addition, we chemically modified CNTs with amide groups, phenyl groups, etc., with the aim of proposing guidelines for making bundles and yarns for controlling interfacial adhesion strength and increasing strength. The conditions of dispersion and amide bond were found to be the most effective in suppressing the decrease in strength.
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| Free Research Field |
ナノメカニクス，ナノテクノロジ，機能性材料
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で得られた2本の無欠陥単層CNTから成るバンドルCNTはヤング率ならびに強度ともに1本の無欠陥CNTとほぼ同値であった．この実験事実は，無欠陥単層CNT群を欠陥が導入されないように精密に注意深くバンドル化すれば，無欠陥単層CNT1本と同程度の機械的物性を維持したまま巨大化できる可能性を示したものであり，世界初の知見と考えられる．高強度を維持したまま巨大化する技術はこれからであり，その実現に一石を投じる強力な成果と言える．また，バンドルCNTの強度維持に最も適した科学プロセスの特定にも成功した．近い将来，バンドルCNTがエンジニアリング材料として実用されることが期待できる．
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