Preparation method of anti-buffering silicon dioxide aerogel heat insulation sheet
A technology of silicon dioxide and heat insulation sheet, which is applied in the direction of chemical instruments and methods, electrical components, secondary batteries, etc., can solve the problems of powder dropping and heat insulation performance, and achieve high-efficiency packaging efficiency
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Embodiment 1
[0036] A preparation method of an anti-buffer silica airgel thermal insulation sheet, characterized in that the steps are as follows:
[0037] (1) Preparation of fiber sheet:
[0038](a) Cut the silicone rubber roll material with a back-shaped knife die to obtain a back-shaped silicone rubber frame of the required size; (b) Put the pre-oxidized silk fiber felt sheet of the corresponding size into the silicone rubber frame to obtain The required pre-oxidized silk fiber sheet, wherein the thickness of the silicone rubber frame is 4, and the thickness of the fiber sheet is 3.5mm;
[0039] (2) Sol impregnation and gelation: Mix the silicon source, ethanol and water evenly, then add a gelling catalyst to make the pH of the solution 7, stir evenly to obtain a catalyzed silica sol, and pre-oxidize the silica sol described in step 1 impregnating the silk fiber sheet and gelling in the catalyzed silica sol to obtain a silica wet gel sheet;
[0040] (3) Gel aging: aging the silica wet...
Embodiment 2
[0051] A preparation method of an anti-buffer silica airgel thermal insulation sheet, characterized in that the steps are as follows:
[0052] (1) Preparation of fiber sheet:
[0053] (a) Cut the silicone rubber roll material with a back-shaped knife die to obtain a back-shaped silicone rubber frame of the required size; (b) Put the glass fiber mat sheet of the corresponding size into the silicone rubber frame to obtain the required size The glass fiber sheet, the thickness of the silicone rubber frame is 5, and the thickness of the fiber sheet is 4.3mm.
[0054] (2) Sol impregnation and gelation: Mix the silicon source, ethanol and water evenly, stir evenly to obtain silica sol, impregnate the glass fiber sheet described in step 1 with the silica sol, and then add gelation The catalyst is gelled to obtain a silica wet gel sheet;
[0055] (3) Gel aging: aging the silica wet gel sheet at room temperature or at 50°C for 16 hours;
[0056] (4) Gel hydrophobization treatment: p...
Embodiment 3
[0067] A preparation method of an anti-buffer silica airgel thermal insulation sheet, characterized in that the steps are as follows:
[0068] (1) Preparation of fiber sheet:
[0069] (a) Cut the silicone rubber roll material with a back-shaped knife die to obtain a back-shaped silicone rubber frame of the required size; (b) Put the aluminum silicate fiber felt sheet of the corresponding size into the silicone rubber frame to obtain The required aluminum silicate fiber sheet, wherein the thickness of the silicone rubber frame is 6mm, and the thickness of the fiber sheet is 5mm.
[0070] (2) Sol impregnation and gelation: Take the silicon source, ethanol and water and mix evenly, then add the gelling catalyst in order to make the pH of the solution 6.5, stir evenly to obtain the catalyzed silica sol, and the silicon dioxide sol described in step 1 impregnating the alumina fiber sheet and gelling in the catalyzed silica sol to obtain a silica wet gel sheet;
[0071] (3) Gel ag...
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