硅酸盐学报2009，Vol.37Issue(10)：1767-1771,5.
常压干燥法制备疏水性SiO2气凝胶
PREPARATION AND PROPERTIES OF HYDROPHOBIC SILICA AEROGELS BY AMBIENT PRESSURE DRYING METHOD
摘要
Abstract
Silica alcogels were prepared with hydrochloric acid, tetraethylorthosilicate (TEOS) precursor, and trimethylchlorosilane (TMCS) and hexane as a surface modifying agent by drying at ambient pressure. The physical properties such as density, appearance, hydrophobicity, specific surface area, pore size distribution and thermal stability were measured. The results show that the physical and hydrophobic properties of the silica acrogels depend on the volume ratio to TMCS ot hexane. The density decreased with in-creasing ψ, and the aerogels are more hydrophobic as ψ=3%. The aerogels were thermally stable at 350 ℃. The aerogel prepared has a high specific surface area (838.6 m2/g) and a large pore volume (2.10 cm3/g).关键词
二氧化硅气凝胶/疏水性/表面改性/共沸法/多孔结构Key words
silica aerogels/ hydrophobic/ surface modification/ azeotropy method/ porous structure分类
化学工程引用本文复制引用
王慧,刘世明,程小苏,税安泽,刘平安,曾令可..常压干燥法制备疏水性SiO2气凝胶[J].硅酸盐学报,2009,37(10):1767-1771,5.基金项目
国家自然科学基金(50676033) （50676033）
广东省自然科学基金(04020035)资助项目. （04020035）
