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中文摘要：
采用廉价的水玻璃为硅源,通过乙醇溶剂替换及六甲基二硅醚和盐酸混合液对湿凝胶的表面基团改性,常压干燥出疏水介孔的SiO2气凝胶块体。制得的SiO2气凝胶块体具有超疏水性,在0～400℃附近,疏水角约155°～130°,其密度为80～200 mg/cm3,比表面积为568 m2/g,孔体积为2.9cm3/g,其室温下的热导率为0.026W/（m K）。
英文摘要：
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）.
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