2021 Fiscal Year Final Research Report
Development of innovated cellulose single fiber fabrication by electrostatic alignment of nano fibrils in a micro channel
Project/Area Number |
19K04187
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 19010:Fluid engineering-related
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Research Institution | Tohoku University |
Principal Investigator |
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | セルロースナノファイバー / 電場応答 / フローフォーカシング法 / 伸長流 / 配向 / 混相流 |
Outline of Final Research Achievements |
Cellulose nano-fibril (CNF) has been paid great attention as one of the most advanced nanosized biomass materials because of their impressive characteristics. The fabrication of materials such as filaments and films with high mechanical properties from CNF has a great potential as a promising environmental stable materials. Since the microscopic alignment of the fibrils within the cellulose filament has a strong effect on the mechanical properties of the material, highly aligned CNF is the key for the fabrication of strong cellulose filament made of CNFs. In this study, an innovative method of controlling CNF alignment has proposed by coupling an alternating electric field with conventional fluid dynamical alignment control. Through understanding the CNF alignment process by electric field, the tensile strength and toughness were increased by 63 % and 120 %, respectively by electric field assisted flow-focusing method.
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Free Research Field |
機能性流体工学
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Academic Significance and Societal Importance of the Research Achievements |
カーボンニュートラル材料であり,環境適合型材料として注目を集めるセルロースナノファイバー(CNF)に対し,交流電場と伸長流動場を組み合わせた革新的配向制御法を開発した。本手法により,従来法で不可能であったCNF配向度の飛躍的な向上に成功し,セルロース単繊維の高強度・高靭性化を実現した。本技術は,軽量・高強度というセルロースの特性を活かした新素材開発に大きく貢献するとともに,自動車部材や航空機,風車翼等へのセルロース単繊維の新たな応用展開を切り拓くものと期待される。
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