A mesoporous γ-al 2 o 3 Ceramic membrane and preparation method thereof
A ceramic membrane and mesoporous technology, which is applied in the field of mesoporous γ-Al2O3 ceramic membrane and its preparation, can solve the problems of difficulty in uniform dispersion, and achieve the effects of narrow pore size distribution, high porosity and small pore size
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Embodiment 1
[0021](1) Preparation of boehmite sol: Dissolve 2.042g of aluminum isopropoxide in 3ml of isopropanol, heat to 80°C, add 16ml of distilled water dropwise to the isopropanol solution and keep stirring, and heat up to 90°C, hydrolyze for 4 hours, completely volatilize the isopropanol during the hydrolysis process, then add 2ml of 1 mol / L nitric acid solution drop by drop, stir at 90°C for 12h after the addition, and put the sol at 70°C after the reaction Ultrasound for 4 hours under the same conditions, and evaporate 40% of distilled water to obtain a stable and transparent boehmite sol;
[0022] (2) Preparation of PAM microspheres: Take 14ml of ethyl acetate, 6ml of ethanol, 2gAM, 0.8g of PVP, and 0.0010g of AIBN in a four-neck flask, stir evenly, then raise the temperature to 70°C under the protection of nitrogen, react for 6h, and react After the end, the obtained mixed solution was centrifuged and precipitated at high speed, washed with absolute ethanol for several times, an...
Embodiment 2
[0028] (1) Preparation of boehmite sol: Dissolve 2.042g of aluminum isopropoxide in 3ml of ethanol, heat to 80°C, add 16ml of distilled water dropwise to the solution of aluminum isopropoxide and keep stirring, then heat up to 90 ℃, hydrolyze for 4 hours, completely volatilize the ethanol during the hydrolysis process, then add 0.252g (0.004mol) acetic acid drop by drop, stir at 90℃ for 12h after the addition is complete, and then ultrasonicate the sol at 70℃ for 4h after the reaction , and volatilized 40% of distilled water to obtain a stable and transparent boehmite sol;
[0029] (2) Preparation of PNIPAM microspheres: Add 1.300g NIPAM, 0.100g MBA and 0.057g SDS into a three-necked flask equipped with a reflux condenser and a gas guiding device, add water and stir to dissolve. Pass N 2 After reaching below the liquid level for 30 minutes, raise the temperature to 70°C, keep it stable for 15 minutes, add an aqueous solution containing 0.069g KPS dropwise, and 2 PNIPAM nanos...
Embodiment 3
[0033] (1) Preparation of boehmite sol: with step (1) in Example 1;
[0034] (2) Preparation of PAM microspheres: Take 14ml of ethyl acetate, 6ml of ethanol, 4g of AM, 0.8g of PVP, and 0.0010g of AIBN in a four-neck flask, stir evenly, then raise the temperature to 70°C under nitrogen protection, react for 6h, and react After the end, the obtained mixed solution was centrifuged and precipitated at high speed, washed with absolute ethanol several times, and dried in vacuum at 60°C for 48 hours, and the average particle size of the obtained PAM microspheres was about 180nm;
[0035] (3) Preparation of PAM microsphere sol: take 0.13g of the PAM microsphere prepared in step (2) in 2ml distilled water, after mixing evenly, add this PAM microsphere solution dropwise to the Boehm microsphere obtained in (1). In the stone sol, and stirred for 4 hours, and then ultrasonicated at room temperature for a period of time, a stable sol containing microspheres was obtained;
[0036] (4) Dryi...
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