Bioinspired hierarchical helical nanocomposite macrofibers based on bacterial cellulose nanofibers  

作　　者：Huai-Ling Gao Ran Zhao Chen Cui Yin-Bo Zhu Si-Ming Chen Zhao Pan Yu-Feng Meng Shao-Meng Wen Chuang Liu Heng-An Wu Shu-Hong Yu 

机构地区：[1]Division of Nanomaterials&Chemistry,Hefei National Laboratory for Physical Sciences at the Microscale,CAS Center for Excellence in Nanoscience,Hefei Science Center of CAS,Department of Chemistry,University of Science and Technology of China,Hefei 230026,China [2]CAS Key Laboratory of Mechanical Behavior and Design of Materials,Department of Modern Mechanics,CAS Center for Excellence in Complex System Mechanics,University of Science and Technology of China,Hefei 230027,China

出　　处：《National Science Review》2020年第1期73-83,共11页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(51732011,51702310,21431006,21761132008,11525211,11872063 and 11802302);the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(21521001);the Key Research Program of Frontier Sciences,CAS(QYZDJ-SSW-SLH036);the National Basic Research Program of China(2014CB931800);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040402);the Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS(2015HSCUE007);the Anhui Provincial Natural Science Foundation(1808085ME115);the National Postdoctoral Program for Innovative Talents(BX201700225);the Fundamental Research Funds for the Central Universities(WK2060190076,WK2090050040 and WK6030000067)

摘　　要：Bio-sourced nanocellulosic materials are promising candidates for spinning high-performance sustainable macrofibers for advanced applications.Various strategies have been pursued to gain nanocellulose-based macrofibers with improved strength.However,nearly all of them have been achieved at the expense of their elongation and toughness.Inspired by the widely existed hierarchical helical and nanocomposite structural features in biosynthesized fibers exhibiting exceptional combinations of strength and toughness,we report a design strategy to make nanocellulose-based macrofibers with similar characteristics.By combining a facile wet-spinning process with a subsequent multiple wet-twisting procedure,we successfully obtain biomimetic hierarchical helical nanocomposite macrofibers based on bacterial cellulose nanofibers,realizing impressive improvement in their tensile strength,elongation and toughness simultaneously.The achievement certifies the validity of the bioinspired hierarchical helical and nanocomposite structural design proposed here.This bioinspired design strategy provides a potential platform for further optimizing or creating many more strong and tough nanocomposite fiber materials for diverse applications.Bio-sourced nanocellulosic materials are promising candidates for spinning high-performance sustainable macrofibers for advanced applications. Various strategies have been pursued to gain nanocellulose-based macrofibers with improved strength. However, nearly all of them have been achieved at the expense of their elongation and toughness. Inspired by the widely existed hierarchical helical and nanocomposite structural features in biosynthesized fibers exhibiting exceptional combinations of strength and toughness, we report a design strategy to make nanocellulose-based macrofibers with similar characteristics. By combining a facile wet-spinning process with a subsequent multiple wet-twisting procedure, we successfully obtain biomimetic hierarchical helical nanocomposite macrofibers based on bacterial cellulose nanofibers, realizing impressive improvement in their tensile strength, elongation and toughness simultaneously. The achievement certifies the validity of the bioinspired hierarchical helical and nanocomposite structural design proposed here. This bioinspired design strategy provides a potential platform for further optimizing or creating many more strong and tough nanocomposite fiber materials for diverse applications.

关 键 词：BIOINSPIRED NANOCOMPOSITE HIERARCHICAL HELICAL macrofibers strength and TOUGHNESS bacterial CELLULOSE 

分 类 号：TQ342[化学工程—化纤工业]