CPC C01B 33/1585 (2013.01) [B01J 13/0091 (2013.01); C04B 30/02 (2013.01); D06M 11/79 (2013.01); F16L 59/028 (2013.01); C01P 2004/03 (2013.01); C01P 2006/22 (2013.01); C01P 2006/32 (2013.01); C04B 2201/32 (2013.01)] | 7 Claims |
1. A method for producing an aerogel blanket, the method comprising:
1) introducing a precursor solution and a catalyst solution comprising a base catalyst and a polar organic solvent into an impregnation tank to produce a catalyzed sol and allowing a catalyzed sol to stay in the impregnation tank to increase in viscosity;
2) passing a base material for a blanket through the impregnation tank to allow the catalyzed sol to penetrate into the base material for a blanket; and
3) subjecting the base material for a blanket into which the catalyzed sol has been penetrated to gelation on a conveyor belt of a device used for gel casting,
wherein a retention time of the catalyzed sol in the impregnation tank is 0.5 minutes to 40 minutes; and
the viscosity of the catalyzed sol when introduced into the base material is 1.2 to 6.0 times the viscosity of the catalyzed sol immediately after being produced.
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