Interfacial properties of polyurethane/nano-SiO2 modified carbon fiber epoxy resin composites

被引：0
|
作者：
Yuan Y. [1 ,2 ]
Zuo J. [3 ]
Peng C. [4 ]
Wu Z. [2 ]
机构：
[1] School of Materials Science and Engineering, Dalian University of Technology, Dalian
[2] State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian
[3] College of Humanities and Social Sciences, Dalian University of Technology, Dalian
[4] College of Textile Science and Engineering, Jiangnan University, Wuxi
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 11期
基金：
中国国家自然科学基金;
关键词：
CF/EP composite; interface property; nano-SiO[!sub]2[!/sub; polyurethane; surface modification of carbon fibers;
D O I：
10.13801/j.cnki.fhclxb.20230117.005
中图分类号：
学科分类号：
摘要：
The interfacial properties between polymer and fiber are particularly important for improving the mechanical properties of composites. In this paper, the surface of nano-SiO2 was modified by polyurethane (PU) capped by isocyanate (− NCO), and the surface of carbon fiber (CF) was modified by KH550. Because of the high reactivity of − NH2 and − NCO, the covalent bond was formed between CF and nano-SiO2 particles through PU molecular chain. The results showed that the introduction of PU polar molecular chain improved the surface energy and wettability of CF. Compared with the CF directly grafted with nano particles by KH550(CF-KH550-SiO2), the surface energy of the CF with nano particles linked by PU (CF-KH550-PU-SiO2) molecules increased by 23.0%, and the grafting rate and dispersion uniformity of surface nano SiO2 particles also improved significantly. Compared with the untreaed CF/epoxy resin (EP) composites, the interfacial strength (IFSS) and the interlaminar shear strength (ILSS) of CF-KH550-PU-SiO2/EP composites increased by 72.9% and 47.9% respectively. Compared with the CF-KH550-SiO2/EP composites, IFSS and ILSS of CF-KH550-PU-SiO2/EP composites increased by 17.3% and 11.2%, respectively. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：6073 / 6086
页数：13
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