Enhanced interfacial bonding of AF/PEEK composite based on CNT/aramid nanofiber multiscale flexible-rigid structure  

作　　者：Nan Zhou Long Xia Naiyu Jiang Yingze Li Hanxiong Lyu Hongyan Zhang Xiaohu Zou Wenbo Liu Dongxing Zhang 

机构地区：[1]School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China [2]School of Materials Science and Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China [3]Department of Civil and Environmental Engineering,Hong Kong Polytechnic University,999077,Hong Kong,China [4]Hongshan Information Technology Research Institute,Beijing 102600,China

出　　处：《Journal of Materials Science & Technology》2024年第30期139-148,共10页材料科学技术(英文版)

摘　　要：The application of aramid fiber(AF)/polyetheretherketone(PEEK)composites is currently hindered by the inert surface and poor wettability of AF,resulting in weak interfacial adhesion and poor mechani-cal properties.Surface coating and the introduction of nanostructures have been proven to be effective approaches to address this problem.Herein,a simple hybrid sizing agent has been developed to modify the AF surface,consisting of soluble polyimide(PI)as a compatibilizer,carboxyl-functionalized carbon nanotubes(CNT-COOH)as a rigid unit,and aramid nanofibers(ANF)as a flexible component.The syner-getic effects of PI and the multiscale flexible-rigid structure(CNT-COOH/ANF)contribute to the formation of chemical and physical bonds between AF and PEEK matrix,further improving the interfacial adhesion and stress transfer efficiency.Attributed to the enhanced wettability and roughness of AF,compared with unsized AF,the flexural strength(220.97 MPa),modulus(13.26 GPa),ILSS(13.36 MPa),and storage modu-lus(12.93 GPa)of the AF/PEEK composite increase by 132.60%,99.00%,18.97%,and 82.70%respectively.Additionally,the flexible-rigid nanonetwork facilitates the penetration of the PEEK resin into pore spaces.This simple and effective approach exhibits promising potential in enhancing the interfacial bonding of AF/PEEK composites.

关 键 词：Aramid fiber(AF)/polyetheretherketone(PEEK) Matrimid 5218(PI) Aramid nanofibers Carbon nanotubes Interfacial adhesion 

分 类 号：TB3[一般工业技术—材料科学与工程]