2020 Fiscal Year Annual Research Report
配向セルロースナノファイバーを内包する伸縮性の高引張強度エアロゲル
| Project/Area Number |
19F19100
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| Research Institution | The University of Tokyo |
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Principal Investigator |
齋藤 継之 東京大学, 大学院農学生命科学研究科(農学部), 准教授 (90533993)
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| Co-Investigator(Kenkyū-buntansha) |
SUN ZHIFANG 東京大学, 農学生命科学研究科, 外国人特別研究員
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| Project Period (FY) |
2019-04-25 – 2021-03-31
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| Keywords | セルロースナノファイバー / エアロゲル / 異方性 |
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| Outline of Annual Research Achievements |
We have discovered a new, facile, scalable and controllable method to get cellulose nanofibril colloids at any concentrations, using controlled condensation method. All of the condensed CNF materials are highly homogeneous. Further gelation of the condensed CNF hydrogels by protonation (H+) or coordination (Al3+) affords a series of transparent and strong hydrogels with water content of 70-90%, which exhibit tensile strength and modulus more than 9 MPa and 480 MPa, respectively. The water content, strength and modulus are very close or even superior to those of muscles and cartilages and would very promising in the biomedical applications. When dried by supercritical method, we obtained a series of CNF aerogels which is stretchable over 20%, with tensile strength and modulus reach 8 MPa and 100 MPa, respectively, yet still possess very low thermal conductivity at 19.3 mW/mK. Our aerogels, both strong and super-insulating, set a new region in the Ashby plots regarding strength and thermal conductivity.
We have submitted a patent regarding this project. The related manuscript is now under construction, and will submit to several major journals in materials science.
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| Research Progress Status |
令和2年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和2年度が最終年度であるため、記入しない。
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