Method for preparing silica aerogel material
A silicon dioxide and aerogel technology, applied in the direction of silicon dioxide, silicon oxide, etc., can solve the problems of long preparation cycle and the preparation process route needs to be optimized, and achieve low density, good hydrophobicity, and concentrated pore size distribution. Effect
Active Publication Date: 2010-04-07
中科润资科技股份有限公司
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Abstract
The invention discloses a method for preparing a silica aerogel material and relates to the method for preparing the aerogel material, in particular to the method for rapidly preparing a transparent SiO2 aerogel by being based on the sol-gel technology and adopting secondary modification and normal pressure drying. The invention provides the method for preparing the silica aerogel material, and the method has simple technology, short cycle, low cost and good safety and is conductive to large-scale production. Tetraethoxysilane is adopted as a silicon source, methyl trimethoxysilane or methyl triethoxysilane is taken as a modifier of a co-precursor, anhydrous ethanol is taken as a solvent, and hydrochloric acid and ammonia are taken as catalysts. The sol-gel acid-base two-step method is adopted for catalysis, thereby preparing the SiO2 wet gel; and the further modification is carried out on a wet gel sample after aging treatment under certain conditions, and the normal pressure low-temperature drying is finally carried out in air atmosphere, thereby preparing the SiO2 aerogel. The equipment cost during the preparation technology is low, the product has good performances and the reaction process is controllable.
Application Domain
Silica
Technology Topic
SolventAir atmosphere +13
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