Influence of Phenyltrimethoxysilane on Physicochemical Properties of Teos Based Monolithic Silica Aerogels Prepared by Supercritical Drying Process
نویسندگان
چکیده
The objective of the present research work is to synthesize transparent, hydrophobic, monolithic silica aerogels with ultralow density by using supercritical drying process. The effect of phenyltrimethoxysilane as a hydrophobic reagent on the physicochemical properties of the silica aerogels has been studied. The total processing time for the synthesis of monolithic silica aerogels minimized to 29 h which was ~2 days. We have succeeded to get ultralow density of the silica aerogels as low as 24 Kgm -3 with 165° water droplet contact angle. The ultralow density affects the thermal conductivity of the silica aerogels.
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