化工学报2011，Vol.62Issue(1)：248-254,7.
共聚法制备疏水性SiO2气凝胶
Preparation and characterization of hydrophobic silica aero-gels by co-precursor method
摘要
Abstract
The hydrophobic silica aero-gels were prepared by copolymerization under ambient pressure, and sol-gel two-step catalysis. Tetraethoxysilane (TEOS) was used as precursor, methacrylic propenyl trimethoxy silane (KH-570) was used as modifier and ethanol (EtOH) was used as solvent. To establish the reaction mechanism and confirm the preparation process steps, in-situ IR was used to monitor the process on line. The pore size distribution, microstructure, surface functional groups and thermal stability were investigated with SEM, BET, FTIR and TG-DSC. The results showed that silica aero-gels modified with KH-570 exhibited good hydrophobic performance with surface area of 877.17 m2 · g-1. This material was composed of accumulated spherical nano-particles. The particle size was in the range of 10-50 nm and the pore size was 1.9-2. 5 nm. It was typical nano-mesoporous material.关键词
疏水性/二氧化硅/共聚法/常压干燥Key words
hydrophobic/ silica aero-gels/ co-precursor method/ ambient pressure drying分类
化学化工引用本文复制引用
郑文芝,陈砺,黄湘桦,陈姚..共聚法制备疏水性SiO2气凝胶[J].化工学报,2011,62(1):248-254,7.基金项目
广东省科技计划项目(2009B011000013) （2009B011000013）
广州市科技计划项目(2009Z2-D48). （2009Z2-D48）
