Tensile strength of glass fibres with carbon nanotube–epoxy nanocomposite coating

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• 作者：Naveed A. Siddiqui ; Man-Lung Sham ; Ben Zhong Tang ; Arshad Munir ; Jang-Kyo Kim
• 关键词：A. Glass fibre ; A. Particle-reinforcement ; B. Strength ; B. Fibre/matrix bond ; Carbon nanotubes
• 刊名：Composites Part A: Applied Science and Manufacturing (Incorporating Composites and Composites Manufacturing)
• 出版年：2009
• 出版时间：October 2009
• 年：2009
• 卷：40
• 期：10
• 页码：1606-1614
• 全文大小：1020 K

文摘

A study has been made of a concept of ‘healing’ coatings applied onto the brittle fibre surface to reduce the stress concentrations and thus to improve the reinforcing efficiency in a composite. Coatings made from neat epoxy and carbon nanotube (CNT) reinforced epoxy nanocomposite were applied onto the individual glass fibres as well as rovings. It is shown that the 0.3 wt. % CNT–epoxy nanocomposite coating gave rise to a significant increase in tensile strength of the single fibre for all gauge lengths, better than the neat epoxy coating. The results on glass fibre roving also indicated a clear beneficial effect of nanocomposite impregnation on tensile strength. The rovings impregnated with the CNT nanocomposite exhibited a more uniform strength distribution and higher strengths than those impregnated with the neat epoxy. The changes in prevailing failure mechanisms influenced by the epoxy and nanocomposite coatings have been identified.