| abstract |
A method for quickly preparing an aerogel by using a microemulsion as a precursor, comprising: 1. measuring off a specific water-soluble silicon source to prepare a quantitative aqueous solution, adding a specific amount of surfactant and co-surfactant, and fully dissolving; 2. measuring off a specific active organic silicon compound and an auxiliary oil phase, adding into the aqueous solution, and stirring at a high speed for a period to form a semi-transparent, uniform, and stable mixed solution, namely, a microemulsion; and 3. compounding the microemulsion with an inorganic additive and a fiber mat, to form a solidified phase after a period, and carrying out aging and ambient pressure drying or supercritical drying to obtain an aerogel material compounded with fiber mat. The method is novel in preparation process, low in raw material costs, and wide in application range. An ambient pressure drying approach can be used, and a supercritical drying process can also be used. The obtained material has an excellent thermal insulation performance, a high structural strength, and a low shrinkage rate after long-term use. |