宇航材料工艺2024，Vol.54Issue(6)：44-51,8.DOI:10.12044/j.issn.1007-2330.2024.06.006
基于DMDMS/VTMS共前驱体法制备柔性硅基气凝胶
Preparation of Flexible Silicon-based Aerogels by DMDMS/VTMS Co-precursor Method
摘要
Abstract
Due to the fragility,hydrophilicity and high cost,the application of aerogels in civil fields is limited.In this paper,the flexible and hydrophobic polysilsesquioxane aerogel has been prepared using dimethyldimethoxysilane(DMDMS)and vinyltrimethoxysilane(VTMS)as co-precursors through atmospheric pressure drying.The effects of different silicon source ratios on the structure and properties of aerogels were studied.When n(DMDMS/VTMS)=2∶3,the silicon-based aerogel exhibits a three-dimensional nanoporous structure,which has low density(0.13 g/cm3),low thermal conductivity[2.919×10-2 W/(m·K)]and superhydrophobicity(151°).Its maximum stress shows no significan change after 500 compression cycles under 50％deformation.According to this simple preparation process,the flexible aerogel has promising application prospects in the field of thermal insulation.关键词
聚倍半硅氧烷气凝胶/疏水性/柔性/低热导率Key words
Polysilsesquioxane aerogel/Hydrophobicity/Flexibility/Low thermal conductivity分类
化学化工引用本文复制引用
吕红丽,罗丽娟,郑振荣,李红晨,赵晓明..基于DMDMS/VTMS共前驱体法制备柔性硅基气凝胶[J].宇航材料工艺,2024,54(6):44-51,8.基金项目
国家自然科学基金项目((52003071) （(52003071）
北京市科技新星计划(Z211100002121090) （Z211100002121090）
