Preparation of carbon nanotube/epoxy composite films with high tensile strength and electrical conductivity by impregnation under pressure

作     者：Heng CHEN Yun CHEN Hang ZHAN Guang WU Jian Ming XU Jian Nong WANG 

作者机构：School of Mechanical and Power Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 China Shanghai Institute of Space Power Sources 2965 Dongchuan Road Shanghai 200245 China 

出 版 物：《Frontiers of Materials Science》 (材料学前沿（英文版）)

年 卷 期：2019年第13卷第2期

页      面：165-173页

核心收录：

学科分类：08[工学] 

基　　金：the National Key R&D Program of China (2018YFA0208404) the National Natural Science Foundation of China (U1362104) 

主　　题：carbon nanotube alignment resin matrix composite tensile strength impregnation under pressure 

摘      要：Based on the production of a carbon nanotube (CNT) assembly, a new technique is developed for preparing CNT/epoxy (EP) composite films with high tensile strength and electrical conductivity. CNTs are synthesized by floating catalyst spray pyrolysis. After self-assembling into a hollow cylindrical assembly, CNTs are drawn and wound on a rotating drum to form a uniform CNT film. EP resin solutions of different concentrations are used to fill into the pores within the film under different pressures and form composite films after hot-press curing. The permeability of the EP resin and thus the interfacial bonding between the CNT and the EP resin are studied by varying the concentration of the EP resin solution and the pressure used for impregnation. Under optimal preparation conditions, the composite film contains CNTs of a high content of 59 wt.%, and shows a high tensile strength of 1.4 GPa and a high electrical conductivity of 1.4x10^5 S·m^-1, 159% and 309% higher than those of the neat CNT film, respectively.