Simultaneously enhanced interfacial shear strength and tensile strength of heterocyclic aramid fiber by graphene oxide  

作　　者：Ziyi Zhang Xiangzheng Jia Chun Li Lanying Li Yeye Wen Zhenfei Gao Jiangwei Zhang Enlai Gao Kun Jiao Jin Zhang 

机构地区：[1]College of Science,China University of Petroleum(Beijing),Beijing 102249,China [2]Beijing National Laboratory for Molecular Sciences,School of Materials Science and Engineering,College of Chemistry and Molecular Engineering,Beijing Science and Engineering Center for Nanocarbons,Peking University,Beijing 100871,China [3]Beijing Graphene Institute(BGI),Beijing 100095,China [4]Department of Engineering Mechanics,School of Civil Engineering,Wuhan University,Wuhan 430072,China [5]China Bluestar Chengrand Chemical Co.,Ltd.,Chengdu 610041,China [6]Science Center of Energy Material and Chemistry,College of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021,China

出　　处：《Nano Research》2023年第10期12286-12293,共8页纳米研究（英文版）

基　　金：the Ministry of Science and Technology of China(No.2016YFA0200100);the Beijing National Laboratory for Molecular Sciences(No.BNLMS-CXTD-202001);the National Natural Science Foundation of China(Nos.52102035,52021006,T2188101,51720105003,and 21790052);the Strategic Priority Research Program of CAS(No.XDB36030100).

摘　　要：Heterocyclic aramid fibers,a typical kind of high-performance fibers,have been widely used in aerospace and protection fields because of their excellent mechanical properties.However,the application of heterocyclic aramid fibers as a reinforcement is hindered by the weak interfacial combination with matrix materials,especially epoxy.Traditional strategies enhancing the interfacial shear strength(IFSS)usually decrease the tensile strength.Therefore,simultaneous enhancement of both mechanical properties remains a challenge.Herein,we report a novel heterocyclic aramid fiber with high interfacial shear strength(49.3 MPa)and tensile strength(6.27 GPa),in which 4,4′-diamino-2′-chlorobenzanilide(DABA-Cl)and a small amount of graphene oxide(GO)are introduced through in-situ polymerization.Hydrogen bonds andπ–πinteraction between GO and polymer chains trigger the enhancement in crystallinity,orientation,and lateral interaction of the fibers,thus improving the tensile strength and interfacial shear strength of the fibers.Moreover,the interfacial interaction between fiber and epoxy is enhanced due to the improvement of the surface polarity of the fibers caused by DABA-Cl.Therefore,a method to improve both tensile strength and interfacial shear strength of heterocyclic aramid fibers was found by introducing GO and DABA-Cl,which may provide guidance for the design and preparation of other high-performance fibers.

关 键 词：heterocyclic aramid fibers graphene oxide(GO) 4 4′-diamino-2′-chlorobenzanilide(DABA-Cl) interfacial shear strength tensile strength 

分 类 号：O62[理学—有机化学]