文献类型：期刊文献

英文题名：Thermally Insulating SiO2/PSA Composite Aerogels with Heat Resistance and Mechanical Properties via the Thiol-Yne Click Reaction

作者：Zhao, Chuanqing[1];Qiao, Fangke[1];Ji, Jiawei[1];Deng, Shifeng[1];Qi, Huimin[1]

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

年份：2023

卷号：39

期号：27

起止页码：9468

外文期刊名：LANGMUIR

收录：;EI(收录号：20232914404662);WOS:【SCI-EXPANDED(收录号:WOS:001016562200001)】；

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：Aerospace industry - Compressive strength - Curing - Heat resistance - Reinforcement - Silica gel - Specific heat - Thermal conductivity - Thermal insulating materials - Thermal insulation

摘要：Polymer-reinforced silica aerogelsare thermally insulating materialsemployed to enhance mechanical properties; however, they exhibit lowheat stability and require a complex production process. The mainbody of this work concerns the synthesis of silicon-containing polyarylacetylene(PSA) resin, which has exceptional thermal properties and is usedto strengthen the gel skeleton and significantly improve the heatresistance of the polymer reinforcement phase. The honeycomb-likeporous SiO2/PSA aerogels derived from directional freezingwere obtained via click reaction, gel aging, freeze-drying, and curingwithout the requirement for time-consuming solvent replacement. Theprepared SiO2/PSA aerogel is low density (& SIM;0.3 g/cm(3)) and high porosity (& SIM;80%), which provides the materialwith low levels of thermal conductivity (& SIM;0.06 W/m & BULL;K)and excellent thermal insulation performance. When compared to themajority of polymer aerogels and aerogel-like materials, the preparedSiO(2)/PSA aerogels have high T (d5) (& SIM;460 & DEG;C) and Y (r800) (& SIM;80%)and compressive strength (compression strength > 1.5 MPa). SiO2/PSA composite aerogel has numerous functions in areas wherematerials must withstand extremely elevated temperatures, such asthe aerospace industry.