碳纳米管纤维纽结设计及其与环氧树脂界面性能  

Knotted carbon nanotube fibers and its interfacial properties with epoxy resin

作　　者：张洁 李文雅 徐安长 赵静娜[3] 张骁骅 李清文[3] ZHANG Jie;LI Wenya;XU Anchang;ZHAO Jingna;ZHANG Xiaohua;LI Qingwen(School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430000, China;School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China;Division of Advanced Nano-Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China;Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China)

机构地区：[1]武汉纺织大学纺织科学与工程学院,湖北武汉430000 [2]西安工程大学纺织科学与工程学院,陕西西安710048 [3]中国科学院苏州纳米技术与纳米仿生研究所,江苏苏州215123 [4]东华大学纺织科技创新中心,上海201620

出　　处：《纺织高校基础科学学报》2020年第4期11-16,24,共7页Basic Sciences Journal of Textile Universities

基　　金：国家自然科学基金(51862036);江西省杰出青年基金(2018ACB20123)。

摘　　要：碳纳米管(carbon nanotube,CNT)纤维因其优异的力学性能和界面效应被认为是下一代高性能碳基纤维材料。研究碳纳米管纤维的表面形态与力学性能间的构效关系,以及纤维与树脂界面性能的影响机制。通过结构设计分析了具有取向结构和有捻结构的CNT纤维的力学性能;采用打结方式设计具有纽结的纤维形态,分析了纽结对纤维力学性能的影响规律;通过微滴包埋法探讨了纽结对纤维与环氧树脂界面结合性能的增强机制。结果表明:取向结构的碳纳米管纤维力学性能优于有捻结构,打结后纤维的拉伸强度有一定程度下降;界面结合性能方面,由于打结本身增加了CNT纤维与树脂的接触面积和表面粗糙度,使纤维与树脂的界面剪切强度从15 MPa增强至约35 MPa。Due to the excellent mechanical properties and interface effect of carbon nanotube(CNT)fiber,it is considered to be the high strength fiber in the next generation.The structure-activity relationship between the surface morphology and mechanical properties of carbon nanotube fibers and the boundary between fiber and epoxy resin were studied.The mechanical properties of CNT fibers with oriented structure and twist structure were analyzed by structural design.Knot method is used to design the knotted fiber,and the influence of kink on the mechanical properties of fibers was analyzed.The strengthening mechanism of kinks on the interfacial bonding between fiber and epoxy resin was discussed by microdrop embedding method.The results show that the mechanical properties of aligned CNT fibers are better than those of twisted CNTs,and the tensile strength of the fiber decreases after knotting.In the aspect of interfacial bonding properties,the interfacial shear strength between fiber and epoxy resin increases from 15 MPa to 35 MPa due to the increase of contact area and surface roughness between CNT fiber and epoxy resin.

关 键 词：碳纳米管纤维 纽结 纤维形态 环氧树脂 界面剪切强度 

分 类 号：TS102.5[轻工技术与工程—纺织工程]