文献类型：期刊文献

英文题名：High-strength and toughness carbon nanotube fiber/resin composites by controllable wet-stretching and stepped pressing

作者：Shi, Qiang Qiang[1];Zhan, Hang[1];Mo, Run Wei[1];Wang, Jian Nong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：189

起止页码：1

外文期刊名：CARBON

收录：;EI(收录号：20215111355413);WOS:【SCI-EXPANDED(收录号:WOS:000760355200001)】；

基金：This research was supported by National Key R&D Program of China (2018YFA0208404), National Natural Science Foundation of China (52172089), and Innovation Program of Shanghai Municipal Education Commission.

语种：英文

外文关键词：Carbon nanotubes; Nanofibers; Nanocomposites; Resins; Strength

摘要：Carbon nanotubes (CNTs) have been used as reinforcements for various composites due to their excellent mechanical properties. However, CNTs have widely suffered from heterogeneous distribution and poor alignment in the composites. To tackle these issues, we herein report an effective strategy towards preparing highly orientated CNT/epoxy (EP) composites from CNT fibers. That is, CNT fibers were continuously soaked and stretched in an EP resin solution and winded into a film on a drum. During this process, the EP resin was infiltrated and the CNTs were aligned simultaneously, leading to a highly uniform and orientated composite. Stepped pressing before formal curing was further utilized to improve the distribution of the EP resin, the densification and thus the internal bonding strength of the composite. The final CNT/EP composite showed a high tensile strength (3.5 GPa) and toughness (80.2 J cm3), appearing superior to those for previous CNT and carbon fiber reinforced composites. (c) 2021 Elsevier Ltd. All rights reserved.