文献类型：期刊文献

英文题名：Silicon-containing polyarylacetylene aerogel with heat resistance and ablative property for high-temperature insulation

作者：Zhao, Chuanqing[1];Chen, Fan[1];Dong, Sensen[1];Liu, Xiaoyun[1];Qi, Huimin[1];Deng, Shifeng[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：139

期号：25

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20221611972956);WOS:【SCI-EXPANDED(收录号:WOS:000782611900001)】；

基金：This work was supported by the Fundamental Research Funds for the Central Universities (JKD01211701).

语种：英文

外文关键词：aerogel; aerospace; heat insulation; macropore

摘要：Owing to the high porosity and low thermal conductivity of organic aerogels, they have been widely used to develop lightweight heat insulation materials. However, their applications in high-temperature environments such as in aerospace applications are usually limited by the heat resistance or ablative property of the organic matrix. In this study, we prepared a novel organic aerogel for high-temperature insulation by the sol-gel method and freeze-drying. The matrix is the thermosetting silicon-containing polyarylacetylene (PSA) resin with excellent comprehensive properties, namely, high heat stability, low volatile component content, and high-temperature ceramic performance. The obtained PSA aerogel retains the heat resistance (T-d5 = 634.8 degrees C) and ablative properties (Y-r800 = 92.6%) of the PSA resin, and the internal regular macropores and high porosity (70%) result in an extremely low weight (0.1200 g cm(-3)), low thermal conductivity (0.039 W m(-1) K-1)), and efficient heat insulation. Thus, this is an ideal material for high-temperature insulation in the aerospace field.