Pressure-resistant heat-insulating paper containing hollow porous silicon dioxide microspheres and preparation method thereof
A technology of porous silica and thermal insulation paper, applied in the direction of silica, silicon oxide, special paper, etc., can solve the problems of poor thermal insulation effect and easy powder drop of thermal insulation paper, and achieve low cost and low production cost , The effect of easy preparation process
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Embodiment 1
[0042] The present embodiment provides a kind of preparation method of hollow porous silica microsphere, comprises the following steps:
[0043] S1: Mix and stir isopropyl orthosilicate (150g) and polyethylene glycol (9.0g) at a speed of 200 rpm, and add vinyltrimethoxysilane (60.2g) and ethanol (30.1 g), stirring until the solution is transparent; then 8.25 g of hydrochloric acid solution with a concentration of 5.0 mol / L is slowly added dropwise, and after the addition is completed, the temperature is raised to 100° C., and the stirring reaction is continued for 12 hours, and the butyrate in the system is quickly distilled off under reduced pressure. alcohol to obtain a prepolymer solution with a certain viscosity;
[0044] S2: Add 20 g of the prepolymer solution dropwise to 100 g of distilled water, stirring continuously to form an emulsion; add formic acid to adjust the pH of the emulsion to 10, continue stirring for 24 hours to obtain a white emulsion, stand still, and fi...
Embodiment 2
[0048] The present embodiment provides a method for preparing a pressure-resistant heat-insulating paper containing hollow porous silica microspheres, comprising the following steps:
[0049] Mix glass fiber and glass wool fiber into a low-speed disperser, add water and stir at a speed of 200r / min until the two fibers are fully mixed without flocs. The glass fiber is a chopped fiber with a length of 2mm, and the glass wool The fiber beating degree is 30°SR, and the mass ratio of glass fiber and glass wool fiber is 0.2:1;
[0050] Add binder-polyamide epichlorohydrin to the slurry suspension obtained in the above steps, stir evenly and let stand for 15 minutes, then add the hollow porous silica microspheres prepared in Example 1, stir evenly and let stand for 15 minutes , to obtain the slurry mixture; the mass ratio of the polyamide epichlorohydrin to glass fiber and glass wool fiber total amount is 0.01:1, and the hollow porous silica microspheres to glass fiber and glass wool...
Embodiment 3
[0054] Mix glass fibers and glass wool fibers into a low-speed disperser, add water and stir at a speed of 300r / min until the two fibers are fully mixed without flocs. The glass fibers are chopped fibers with a length of 2mm, and glass wool The fiber beating degree is 45°SR, and the mass ratio of glass fiber and glass wool fiber is 0.5:1;
[0055] Add the binder-polyacrylamide to the slurry suspension obtained in the above steps, stir evenly and let stand for 15 minutes, then add the hollow porous silica microspheres prepared in Example 1, stir evenly and let stand for 15 minutes to obtain a slurry Material mixed solution; the mass ratio of the polyacrylamide to the glass fiber and the glass wool total amount is 0.1:1, and the mass ratio of the hollow porous silica microspheres to the glass fiber and the glass wool total amount is 5% ;
[0056] Add the slurry mixture to the wet papermaking system, the concentration of the online is 0.1%, the pH of the online is 6.5, and the b...
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Abstract
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