Tough and Moldable Sustainable Cellulose-Based Structural Materials via Multiscale Interface Engineering,Advanced Materials

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Tough and Moldable Sustainable Cellulose-Based Structural Materials via Multiscale Interface Engineering
Advanced Materials ( IF 27.4 ) Pub Date : 2023-10-25 , DOI: 10.1002/adma.202306451
Xin Yue ₁ , Huai-Bin Yang ₁ , Zi-Meng Han ₁ , Yi-Xing Lu ₁ , Chong-Han Yin ₁ , Xiang Zhao ₁ , Zhao-Xiang Liu ₁ , Qing-Fang Guan ₁ , Shu-Hong Yu _{1,

2}

Affiliation

All-natural materials derived from cellulose nanofibers (CNFs) are expected to be used to replace engineering plastics and have attracted much attention. However, the lack of crack extension resistance and 3D formability of nanofiber-based structural materials hinders their practical applications. Here, a multiscale interface engineering strategy is reported to construct high-performance cellulose-based materials. The sisal microfibers are surface treated to expose abundant active CNFs with positive charges, thereby enhancing their interfacial combination with the negatively charged CNFs. The robust multiscale dual network enables easy molding of multiscale cellulose-based structural materials into complex 3D special-shaped structures, resulting in nearly twofold and fivefold improvements in toughness and impact resistance compared with those of CNFs-based materials. Moreover, this multiscale interface engineering strategy endows cellulose-based structural materials with better comprehensive performance than petrochemical-based plastics and broadens cellulose's potential for lightweight applications as structural materials with lower environmental effects.

中文翻译：

通过多尺度界面工程制造坚韧且可模压的可持续纤维素结构材料

由纤维素纳米纤维（CNF）衍生的全天然材料有望用于替代工程塑料而备受关注。然而，纳米纤维基结构材料缺乏抗裂纹扩展性和 3D 成形性，阻碍了其实际应用。在此，报道了一种多尺度界面工程策略来构建高性能纤维素基材料。剑麻微纤维经过表面处理，暴露出丰富的带正电荷的活性CNF，从而增强其与带负电荷的CNF的界面结合。强大的多尺度双网络使得多尺度纤维素基结构材料能够轻松成型为复杂的3D异形结构，与CNF基材料相比，韧性和抗冲击性提高了近两倍和五倍。此外，这种多尺度界面工程策略赋予纤维素基结构材料比石化基塑料更好的综合性能，并拓宽了纤维素作为对环境影响较小的结构材料的轻量化应用潜力。

更新日期：2023-10-25

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