Method for manufacturing aerogel blanket
A method for manufacturing an aerogel blanket, the method capable of simplifying manufacturing equipment by performing gelation while rotating a reaction vessel, improving manufacturing efficiency by controlling manufacturing time regardless of the thickness of an aerogel blanket and improving thermal conductivity by uniformly forming an aerogel in a substrate for blanket.
1. A method for manufacturing an aerogel blanket, the method comprising:
(Step 1) introducing a catalyzed sol and a substrate for the blanket into a reaction vessel, and
(Step 2) performing gelation while rotating the reaction vessel,
wherein the substrate for the blanket is a porous substrate, and
wherein the catalyzed sol is introduced in an amount of 80-120% based on the volume of the substrate for the blanket.
2. The method of claim 1 , wherein the reaction vessel in Step 2 is rotated at a rate of 10 rpm to 400 rpm.
3. The method of claim 1 , wherein the rotation in Step 2 is performed by disposing the long axis of the reaction vessel in a lateral direction.
4. The method of claim 1 , wherein the reaction vessel is a reaction vessel in a cylindrical shape.
5. The method of claim 1 , wherein the substrate for the blanket is a film, a sheet, a net, a fiber, a foam, a non-woven body, or a laminate of two or more layers thereof.
6. The method of claim 1 , wherein the catalyzed sol is a catalyzed silica sol.
7. The method of claim 1 , further comprising an aging step and a surface modification step after Step 2.
8. The method of claim 7 , wherein the aging step and the surface modification step are performed inside the reaction vessel.
9. The method of claim 1 , further comprising a drying step after Step 2,
wherein the drying step is performed by supercritical drying, or by an atmospheric drying process performed under the conditions of a pressure of 1±0.3 atm and a temperature of 70° C. to 200° C.
10. A method for manufacturing an aerogel blanket, the method comprising:
introducing a substrate for the blanket into a reaction vessel;
introducing a catalyzed sol into the reaction vessel into which the substrate for the blanket has been introduced;
performing gelation while rotating the reaction vessel; and
drying the gelled wet gel blanket, wherein the substrate for the blanket is a porous substrate obtained by rolling a fibrous batting material on a fiber-roll preform having a plurality of fiber layers,
wherein the catalyzed sol is introduced in an amount of 80-120% based on the volume of the substrate for the blanket.