Method of preparing polrvinyl chloride/polyether sulfone/cellulose derivative blend membrane
A technology of cellulose derivatives and polyvinyl chloride, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as strong hydrophobicity, achieve hydrophilicity adjustable, good chemical stability and Heat resistance, large flux effect
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Embodiment 1
[0027] (1) The mass fractions were 10% polyvinyl chloride, 5.5% polyethersulfone, 4% cellulose acetate, 3% nano-zinc oxide, and 77.5% solvent N,N-dimethyl Acetamide is put into the Erlenmeyer flask, placed in a water bath with a constant temperature of 80°C and stirred until completely dissolved, then left to stand and defoamed for subsequent use;
[0028] (2) Keep the temperature of the clean glass plate, scraper and film casting solution consistent, scrape out a flat film with a thickness of 200 μm on the glass plate, pre-evaporate for 20 seconds, and then immerse in a water bath at 20°C to solidify to form a film;
[0029] (3) After the film falls off, it is taken out of the water bath, fully washed with distilled water, soaked to remove the solvent remaining in the film, and dried at low temperature after pore-preserving treatment to obtain the finished film.
[0030] The water flux measured by the membrane under wet conditions is 900L / (m at 0.15MPa 2 .h), the contact ang...
Embodiment 2
[0032] (1) The mass fractions were 12% polyvinyl chloride, 6% polyethersulfone, 2% cellulose acetate, 2% nano-silicon oxide, and 78% solvent N,N-dimethyl Acetamide is put into the Erlenmeyer flask, placed in a water bath with a constant temperature of 80°C and stirred until completely dissolved, then left to stand and defoamed for subsequent use;
[0033] (2) Keep the temperature of the clean glass plate, the scraper and the casting liquid at the same temperature, scrape out a flat film with a thickness of 200 μm on the glass plate, pre-evaporate for 30 seconds, and then immerse in a water bath at 10°C to solidify to form a film;
[0034] (3) After the film falls off, it is taken out of the water bath, fully washed with distilled water, soaked to remove the solvent remaining in the film, and dried at low temperature after pore-preserving treatment to obtain the finished film.
[0035] The water flux measured by the membrane under wet conditions is 600L / (m at 0.15MPa 2 .h), th...
Embodiment 3
[0037] (1) The mass fractions were 5% polyvinyl chloride, 12% polyethersulfone, 1% cellulose acetate, 2% nano-titanium dioxide, and 80% solvent N,N-dimethyl Acetamide is put into the Erlenmeyer flask, placed in a water bath with a constant temperature of 80°C and stirred until completely dissolved, then left to stand and defoamed for subsequent use;
[0038] (2) Keep the temperature of the clean glass plate, scraper and casting solution consistent, scrape out a flat film with a thickness of 200 μm on the glass plate, pre-evaporate for 5 seconds, and then immerse in a water bath at 30°C to solidify to form a film;
[0039] (3) After the film falls off, it is taken out of the water bath, fully washed with distilled water, soaked to remove the solvent remaining in the film, and dried at low temperature after pore-preserving treatment to obtain the finished film.
[0040] The water flux measured by the membrane under wet conditions at 0.15MPa is 410L / (m 2 .h), the contact angle o...
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Abstract
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