Journal of Shanghai University 2018, Vol. 24 Issue (6): 961-967 DOI: 10.12066/j.issn.1007-2861.1859
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
AbstractCarbon 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.
Received: 06 December 2016
Published: 26 December 2018