温度对碳纳米管纤维/环氧树脂界面剪切强度的影响

doi:10.12066/j.issn.1007-2861.1859

上海大学学报(自然科学版) ›› 2018, Vol. 24 ›› Issue (6): 961-967.doi: 10.12066/j.issn.1007-2861.1859

温度对碳纳米管纤维/环氧树脂界面剪切强度的影响

马奇利¹^,², 张翠霞², 王晗², 蒋瑾², 吕卫帮²()

1.上海大学材料科学与工程学院, 上海 200444
2.中国科学院苏州纳米技术与纳米仿生研究所, 江苏苏州 215123

收稿日期:2016-12-06 出版日期:2018-12-30 发布日期:2018-12-26
通讯作者: 吕卫帮 E-mail:wblv2013@sinano.ac.cn
基金资助:
国家自然科学基金资助项目(11472291);江苏省自然科学基金资助项目(BK20141208)

Temperature effect on interfacial shear strength of carbon nanotube fiber/epoxy resin composites

MA Qili¹^,², ZHANG Cuixia², WANG Han², JIANG Jin², LÜ Weibang²()

1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
2. Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, Jiangsu, China

Received:2016-12-06 Online:2018-12-30 Published:2018-12-26
Contact: Lü Weibang E-mail:wblv2013@sinano.ac.cn

摘要/Abstract

摘要：

碳纳米管纤维具有优异的力学、电学和热学性能, 是未来高性能多功能树脂基复合材料的理想增强材料. 采用微滴包埋实验方法, 结合光学显微镜和扫描电子显微镜等表征手段, 研究环境温度对碳纳米管纤维/环氧树脂基体间界面剪切强度的影响, 并对其机理进行分析. 实验结果表明, 在室温至 140 ℃ 环境温度范围内, 界面剪切强度随着温度的升高而明显降低. 主要原因是: 环氧树脂和碳纳米管纤维的热膨胀系数存在较大差异, 环境温度升高时界面处发生热失配; 高温下树脂基体软化, 与纤维的结合力变弱. 研究结果对碳纳米管纤维复合材料设计具有重要的指导意义.

关键词: 碳纳米管纤维, 环氧树脂, 界面剪切强度, 温度效应

Abstract:

Carbon nanotube (CNT) fibers possess excellent mechanical, electrical and thermal properties, such that they have been considered as ideal reinforcement for future high-performance polymeric composites. This study investigates the temperature effect on the interfacial shear strength between CNT fibers and epoxy resin by performing microdroplet tests, and optical/electrical microscopy analyses. It is found that the interfacial shear strength decreases obviously with increasing ambient temperature. This is mainly because the coefficient of thermal expansion of CNT fibers is much lower than that of the resin so that the fiber/resin interface debonds upon heating. Meanwhile, the resin becomes soft at high temperatures, also degrading the interfacial bonding strength. This study provides guidance for the design of carbon nanotube fibers based composite materials.

Key words: carbon nanotube fibers, epoxy resin, interfacial shear strength, temperature effect

中图分类号:

TB332

马奇利, 张翠霞, 王晗, 蒋瑾, 吕卫帮. 温度对碳纳米管纤维/环氧树脂界面剪切强度的影响[J]. 上海大学学报(自然科学版), 2018, 24(6): 961-967.

MA Qili, ZHANG Cuixia, WANG Han, JIANG Jin, LÜ Weibang. Temperature effect on interfacial shear strength of carbon nanotube fiber/epoxy resin composites[J]. Journal of Shanghai University（Natural Science Edition）, 2018, 24(6): 961-967.

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温度对碳纳米管纤维/环氧树脂界面剪切强度的影响

Temperature effect on interfacial shear strength of carbon nanotube fiber/epoxy resin composites

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