High performance epoxy composites prepared using recycled short carbon fiber with enhanced dispersibility and interfacial bonding through polydopamine surface-modification

被引：113
作者：
Huan, Xianhua [1 ]
Shi, Ke [1 ]
Yan, Jiqiang [1 ]
Lin, Song [3 ]
Li, Yanjie [1 ]
Jia, Xiaolong [1 ,2 ]
Yang, Xiaoping [1 ,2 ]
机构：
[1] Beijing Univ Chem Technol, Coll Mat Sci & Engn, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, Key Lab Carbon Fiber & Funct Polymer, Minist Educ, Beijing 100029, Peoples R China
[3] North China Inst Aerosp Engn, Langfang 065000, Hebei, Peoples R China
来源：
COMPOSITES PART B-ENGINEERING | 2020年 / 193卷
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
Polymer-matrix composites (PMCs); Recycling; Interface/interphase; Surface treatments; MECHANICAL-PROPERTIES; ACOUSTIC-EMISSION; GRAPHENE OXIDE; ELECTRICAL-CONDUCTIVITY; FIBER/EPOXY COMPOSITES; REINFORCED POLYMERS; CFRP; TECHNOLOGIES; POLYURETHANE; INTERPHASE;
D O I：
10.1016/j.compositesb.2020.107987
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The critical issue and challenge in reusing recycled carbon fiber (rCF) was to fully exerting its outstanding properties via an efficient and environmental-friendly way. In this study, the strengthening effects of polydopamine surface-modified recycled short CF (pDop-rSCF) on mechanical, thermo-mechanical, electrical and electromagnetic properties of epoxy (EP)-based composites were systematically evaluated. The dispersibility of pDop-rSCF in suspension used for fabricating nonwoven mat was quantitatively characterized with crowding factor N, dispersion coefficient 1 and fractal dimension D. Significant enhancements were achieved in tensile and flexural properties, interlaminar shear strength, storage modulus and electromagnetic interference shielding capability of EP composites reinforced with pDop-rSCF nonwoven mat, which was primarily ascribed to chemically strengthened interfacial bonding between pDop-rSCF and EP matrix and the increased connectivity among pDop-rSCFs with excellent dispersion.
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页数：14
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