Method for preparing pervaporation membrane for separating alcohol-water system
A pervaporation membrane and system technology, applied in the field of pervaporation membrane preparation, can solve the problems of violating the strategic requirements of sustainable development, unstable product quality, shortage of food supply, etc., achieve stable separation performance, simple and feasible method, easy-to-handle effects
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Embodiment 1
[0029] Embodiment 1, a kind of preparation method that is used to separate the pervaporation membrane of alcohol-water system, carries out following steps successively:
[0030] 1) Put 5g of polydimethylsiloxane (PDMS) and 150mL of n-hexane into the container, and stir thoroughly for 2 hours;
[0031] 2) Then, add 0.5 g of propyl orthosilicate and 0.1 g of monobutyltin dilaurate into the container, and fully stir and react at room temperature for 2 hours to obtain a mixed solution;
[0032] 3), then the above-mentioned mixed solution is successively filtered, defoamed, and rested; on the bottom membrane of the PAN (polyacrylonitrile) ultrafiltration membrane, the film is scraped with a scraper knife to obtain a membrane embryo with a thickness of 150 μm;
[0033] 4) First vulcanize the above-mentioned membrane embryo at room temperature for 48 hours, let the solvent evaporate at room temperature; then put the membrane embryo into a drying oven at 110°C for further high-tempera...
Embodiment 2
[0041] Embodiment 2, a kind of preparation method that is used to separate the pervaporation membrane of alcohol-water system, carries out following steps successively:
[0042] 1) Put 5g of polydimethylsiloxane (PDMS) and 150mL of n-octane into the container, and stir thoroughly for 2 hours;
[0043] 2) Then, add 0.5 g of propyl orthosilicate and 0.1 g of monobutyltin dilaurate into the container, and fully stir and react at room temperature for 2 hours to obtain a mixed solution;
[0044] 3), then the above-mentioned mixed solution is successively filtered, defoamed, and rested; on the bottom membrane of the PAN (polyacrylonitrile) ultrafiltration membrane, the film is scraped with a scraper knife to obtain a membrane embryo with a thickness of 150 μm;
[0045] 4) First vulcanize the above-mentioned membrane embryo at room temperature for 48 hours, let the solvent evaporate at room temperature; then put the membrane embryo into a drying oven at 110°C for further high-tempera...
Embodiment 3
[0053] Embodiment 3, a kind of preparation method that is used to separate the pervaporation membrane of alcohol-water system, carries out following steps successively:
[0054] 1) Put 5g of polydimethylsiloxane (PDMS) and 150mL of n-hexane into the container, and stir thoroughly for 2 hours;
[0055] 2), then add 0.5g ethyl orthosilicate and 0.1g dibutyltin dilaurate into the container, fully stir and react at room temperature for 2 hours to obtain a mixed solution;
[0056] 3), then the above-mentioned mixed solution is successively filtered, defoamed, and rested; on the bottom membrane of the PAN (polyacrylonitrile) ultrafiltration membrane, the film is scraped with a scraper knife to obtain a membrane embryo with a thickness of 150 μm;
[0057] 4) First vulcanize the above-mentioned membrane embryo at room temperature for 48 hours, let the solvent evaporate at room temperature; then put the membrane embryo into a drying oven at 110°C for further high-temperature vulcanizat...
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