硅酸盐学报2012,Vol.40Issue(1):160-164,5.
水玻璃为源的超疏水型SiO_2气凝胶块体制备与表征
Preparation of Super-Hydrophobic SiO_2 Aerogel Monoliths from Sodium Silicate
摘要
Abstract
The hydrophobic and mesoporous SiO2 aerogels were prepared with low cost sodium silicate as precursors via an ambient pressure drying process including solvent exchange of ethanol and surface modification of a hexamethyl-disiloxane-hydrochloric acid mixture.The SiO2 aerogels with the low density(80-200 mg/cm3),the high specific surface area(568 m2/g) and the large pore volume(2.9 cm3/g) exhibited hydrophobic(the contact angle from 155°to 130°in 0-400 ℃).The thermal conductivity of the aerogels at room temperature was only 0.026 W/(m?K).关键词
二氧化硅气凝胶/水玻璃/超疏水/低热导率Key words
silica aerogels/sodium silicate/super-hydrophobic/low thermal conductivity分类
化学化工引用本文复制引用
刘光武,周斌,倪星元,沈军,杜艾,祖国庆..水玻璃为源的超疏水型SiO_2气凝胶块体制备与表征[J].硅酸盐学报,2012,40(1):160-164,5.基金项目
国家自然科学基金 ()
国家科技支撑计划 ()
教育部博士点基金 ()
2008年新世纪优秀人才支持计划(NCET-08-0405)资助项目 ()