文献类型：期刊文献

英文题名：A direct foaming approach for carbon nanotube aerogels with ultra-low thermal conductivity and high mechanical stability

作者：Chen, Yu Wen[1];Zhan, Hang[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：2021

卷号：13

期号：27

起止页码：11878

外文期刊名：NANOSCALE

收录：;EI(收录号：20212910657675);WOS:【SCI-EXPANDED(收录号:WOS:000668139500001)】；

基金：This research was supported by the National Key R&D Program of China [2018YFA0208404], the National Natural Science Foundation of China [U1362104], and the Innovation Program of Shanghai Municipal Education Commission.

语种：英文

外文关键词：Aerogels - Mechanical stability - Energy efficiency - Fire resistance - Carbon films - Thermal conductivity - Thermal insulation - Thermal insulating materials - Yarn

摘要：Thermally insulating materials (TIMs) with ultra-low thermal conductivity, fire-retardancy, and mechanical stability are demanded to improve energy efficiency in many fields, such as petrochemical plants, energy-saving buildings, and aerospace. However, traditional polymer-based TIMs could not meet these demands. Herein, we propose a direct foaming strategy for obtaining carbon nanotube (CNT) aerogels by the gradual expansion of CNT films with H2O2 as a foaming agent at room temperature. The obtained CNT aerogels have hierarchical cellular structures and possess an ultra-low density (4.6 mg cm(-3)) and thermal conductivity (16.5 mW m(-1) K-1) as well as excellent mechanical robustness and fire-resistance. Our results show that such CNT aerogels have promising applications in the field of thermal insulation and present a facile pathway for the design of thermally insulating, fire-retardant materials based on CNTs.