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US 11,332,378 B2Granted
Method for producing silica aerogel
AssigneeLG Chem, Ltd.
InventorsJong Hun Kim, Se Won Baek
Life of this patent
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Abstract
A method for producing a silica aerogel, the method including preparing a reactant by adding a basic catalyst to a first silica precursor solution, performing primary gelation in which the reactant is stirred to form a gel precursor, introducing a second silica precursor solution to a fiber, and performing a secondary gelation in which the gel precursor is introduced to the fiber to which the second silica precursor solution was introduced to form a silica aerogel.
Claims8
A method for producing a silica aerogel, the method comprising:
- preparing a reactant by adding a basic catalyst to a first silica precursor solution;
- performing primary gelation in which the reactant is stirred at a stirring rate of 50 rpm to 500 rpm to form a gel precursor having a viscosity of 1 cP to 25 cP at 25° C.;
- introducing a second silica precursor solution to a fiber;
- performing secondary gelation in which the gel precursor is introduced to the fiber to which the second silica precursor solution was introduced to form a silica aerogel precursor;
- and drying the silica aerogel precursor to produce the silica aerogel.
2 more elements
A method for producing a silica aerogel sheet, the method comprising:
- preparing a reactant by adding a basic catalyst to a first silica precursor solution;
- performing primary gelation in which the reactant is stirred at a stirring rate of 50 rpm to 500 rpm to form a gel precursor having a viscosity of 1 cP to 25 cP at 25° C.;
- introducing a second silica precursor solution to a continuous fiber sheet;
- performing secondary gelation in which the gel precursor is introduced to the continuous fiber sheet to which the second silica precursor solution was introduced to be gelled;
- forming a plurality of layers by winding the secondary gelled continuous fiber sheet precursor;
- and drying the secondary gelled continuous fiber sheet to produce the silica aerogel sheet.
3 more elements
Dependencies are inferred from the claim text.