A sizing agent modified with carbon nanotubes used for the production of carbon fiber/bisphenol A epoxy composites

作者：Cao Li-juan; Yang Yu^*; Lu Chun-xiang

来源：New Carbon Materials, 2016, 31(2): 151-158.

DOI：10.19869/j.ncm.1007-8827.2016.02.005

• Carbon fibers
• Carbon nanotube
• Sizing
• Interfacial performance

An emulsion made by mixing carbon nanotubes (CNTs), epoxy, Tween-80 and Span-60 was used as a sizing agent carbon fibers (CFs) used to prepare CF/bisphenol A epoxy composites. The effects of the CNT modification on the stability of the emulsion, surface morphology and composition of the CFs, the contact angle of bisphenolA epoxy on the CFs and the interfacial shear strength of the composites were investigated by SEM, XPS, AFM and mechanical tests. Results indicate that the stability of the CNT-modified emulsion against sedimentationis better than the unmodified one. The surface roughness of the CFs is increased by 73.1%, the contact angle is reduced by 11.9%, and the number of surface oxygen functional groups on the CFs is increased by 45.96% compared with those without CNT modification. The interfacial shear strength of the composite with an optimized CNT content of 0.75 wt% is 14.7% higher than that without CNTs.

• 出版日期2016-4
• 单位中国科学院山西煤炭化学研究所