Enhancing the interfacial strength of glass/epoxy composites using ZnO nanowires

材料科学 复合材料 极限抗拉强度 环氧树脂 润湿 接触角 玻璃纤维 纳米线 涂层 纤维 纳米技术
作者
Gowthaman Swaminathan,Chandrakumar Palanisamy,Gowrisankar Chidambaram,Gaëlle Henri,U. Chandrasekhar
出处
期刊:Composite Interfaces [Taylor & Francis]
卷期号:25 (2): 151-168 被引量:26
标识
DOI:10.1080/09276440.2017.1341790
摘要

This paper investigated the application of ZnO nanowires (ZnO NW) to enhance the interfacial strength of glass/epoxy composites. ZnO NW were grown on glass fibers by hydrothermal method, tensile properties of bare and ZnO NW coated fibers were measured by single fiber tensile testing, wettability of fiber with resin was studied by contact angle measurements and finally the interfacial strength and mechanisms were determined by single fiber fragmentation testing of glass/epoxy composites. The surface coverage of ZnO NW on glass fibers was fairly uniform without formation of major clusters. The coating of ZnO NW slightly reduced the tensile strength and improved the tensile modulus of fibers. Wettability tests showed reduction in contact angles for ZnO NW coated fibers because of enhanced wetting and infiltration of epoxy resin into nanowires. In fragmentation testing of microcomposites, smaller and concentrated interfacial debonding zones for ZnO NW coated fibers indicated good stress transfer and strong interfacial adhesion. A new form of crossed and closely spaced stress patterns were observed for nanowires of high aspect ratios. The interfacial strength of ZnO NW coated fibers increased by at least 109% and by 430% on average, which was attributed to the increased surface area and mechanical interlocking provided by ZnO NW.
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