Nanofibril Organization in Silk Fiber as Inspiration for Ductile and Damage-Tolerant Fiber Design

作     者：Shihui Lin Chao Ye Wenwen Zhang Anchang Xu Shixian Chen Jing Ren Shengjie Ling 

作者机构：School of Physical Science and TechnologyShanghaiTech University393 Middle Huaxia RoadShanghai 201210China Jiangsu Co‑Innovation Center of Efficient Processing and Utilization of Forest ResourcesJiangsu Key Lab of Biomass‑Based Green Fuel and ChemicalsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China State Key Laboratory of New Textile Materials and Advanced Processing TechnologySchool of Textile Science and EngineeringWuhan Textile UniversityWuhan 430200China 

出 版 物：《Advanced Fiber Materials》 (先进纤维材料（英文）)

年 卷 期：2019年第1卷第3期

页      面：231-240页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 0402[教育学-心理学(可授教育学、理学学位）] 0303[法学-社会学] 0821[工学-纺织科学与工程] 1002[医学-临床医学] 08[工学] 0837[工学-安全科学与工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：We acknowledge National Natural Science Foundation(No.51973116,U1832109,21935002) Shanghai Pujiang Program(18PJ1408600),the National Natural Science Foundation of China(21808220) the starting grant of ShanghaiTech University and Shanghai Sailing Program(17YF1411500)for support of this work. 

主　　题：Fiber Silk Mechanical property Damage tolerance Bioinspired materials 

摘      要：Ductile and damage-tolerant fibers(DDTFs)are desired in aerospace engineering,mechanical engineering,and biomedical engineering because of their ability to prevent the catastrophic sudden structural/mechanical failure.However,in practice,design and fabrication of DDTFs remain a major challenge due to finite fiber size and limited processing techniques.In this regard,animal silks can provide inspirations.They are hierarchically structured protein fibers with an elegant trade-off of mechanical strength,extensibility and damage tolerance,making them one of the toughest materials known.In this article,we confirmed that nanofibril organization could improve the ductility and damage-tolerance of silk fibers through restricted fibril shearing,controlled slippage and cleavage.Inspired by these strategies,we further established a rational strategy to produce polyamide DDTFs by combining electrospinning and yarn-spinning techniques.The resultant polymeric DDTFs show a silk-like fracture resistance behavior,indicating potential applications in smart textile,biomedicine,and mechanical engineering.