中国塑料2025，Vol.39Issue(4)：69-74,6.DOI:10.19491/j.issn.1001-9278.2025.04.013
表面活性剂对介孔二氧化硅气凝胶结构和性能的影响研究
Effect of surfactant on the structure and properties of mesoporous SiO2 aerogel materials
摘要
Abstract
A mesoporous SiO2 aerogel was synthesized by using a surfactant-assisted templating sol-gel technique through graded ambient pressure drying.The effects of surfactants on the microstructure,thermal conductivity,and thermal stability of the as-synthesized SiO2 aerogel were investigated.The results indicated that the introduction of sur-factants not only could avoid the solvent exchange process in the conventional sol-gel method but also could regulate the porous structure of the SiO2 aerogel.The SiO2 aerogel exhibited a low thermal conductivity of 0.018～0.035 W m-1 K-1,a high specific surface area of 469.56～692.07 m2/g,and good hydrophobicity with a contact angle of 136.7 °～151.8 °.This study provides an effective method for low-cost preparation of SiO2 aerogel with excellent per-formance,and the resultant aerogel can be used as thermal insulation and heat preservation materials in the building and industrial fields.关键词
表面活性剂/二氧化硅气凝胶/常压分级干燥/低导热系数Key words
surfactant-assisted/SiO2 aerogel/ambient pressure drying/low thermal conductivity分类
化学工程引用本文复制引用
雷琦锋..表面活性剂对介孔二氧化硅气凝胶结构和性能的影响研究[J].中国塑料,2025,39(4):69-74,6.基金项目
高海拔艰险山区铁路建设关键材料的腐蚀机理与性能评价方法(U2368207) （U2368207）
