Fabrication of highly aligned and integrated cellulose nanofibers by electrospinning

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04686
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26040:Structural materials and functional materials-related
• Research Institution: University of Fukui
• Principal Investigator: Fujita Satoshi 福井大学, 学術研究院工学系部門, 教授 (60504652)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: セルロースナノファイバー / エレクトロスピニング / 生分解性プラスチック / 異方性

Outline of Final Research Achievements

We aimed to enhance the orientation of cellulose nanofibers (CNFs) using electrospinning to develop tough materials. Electrospinning involves applying high voltage to eject a polymer solution, resulting in fine fibers. We created unidirectionally oriented CNF/polyethylene oxide (PEO) sheets from a CNF suspension mixed with PEO, a polymer with spinnability. This process incorporated aligned CNFs into the fine fibers, enhancing the mechanical strength of the sheets. Additionally, we fabricated highly oriented and tough CNF/poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) nonwoven sheets by electrospinning a Pickering emulsion containing CNFs embedded within PHBH. Laminating these sheets through thermal pressing yielded transparent, high-strength films. These findings demonstrate the potential for high-orientation CNF technology, leading to next-generation materials surpassing wood in performance. CNFs as part of bioplastic materials will contribute to reduced environmental impact.

Free Research Field

生体材料

Academic Significance and Societal Importance of the Research Achievements

セルロースナノファイバー（CNF）の配向化と伸長化に成功し、積層した高強度材料の開発が実現した。エレクトロスピニング法を用いることで、CNFの繊維を一方向に揃え、相互作用を最大化することが可能になった。これにより、従来の材料を超える強靭性を持つフィルムやシートを製造できるようになった。この技術革新により、自動車や航空機などの高負荷環境にも対応可能な新たな材料の展開が期待される。