Polyvinyl chloride hollow fiber ultrafiltration membrane and preparation method thereof
A technology of polyvinyl chloride and ultrafiltration membranes, applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve the problems of low elongation at break, low traction speed, and less water flow, and achieve elongation at break High, high traction speed, large water flow effect
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no. 1 example
[0020] The polyvinyl chloride hollow fiber ultrafiltration membrane is prepared from the corresponding casting solution, which includes by weight percentage: 12% polyvinyl chloride, 9% hydrophilic agent, 10% pore-forming agent, and 69% solvent .
[0021] Among them, the hydrophilic agent is a binary copolymer of vinyl chloride and vinyl acetate; the pore-forming agent is one or a mixture of polyethylene glycol and polyvinylpyrrolidone; the solvent is dimethylacetamide, dimethyl formaldehyde One or a mixture of two amides.
[0022] The preparation method of the polyvinyl chloride hollow fiber ultrafiltration membrane of the present embodiment comprises the following steps:
[0023] A, prepare film-casting solution according to each component of described weight ratio;
[0024] B. Fully stir the casting liquid at 60 degrees Celsius to remove air bubbles;
[0025] C. Pump the film-casting solution into the insert tube type hollow fiber spinneret, the pulling speed is 32 m / min,...
no. 2 example
[0028] The polyvinyl chloride hollow fiber ultrafiltration membrane is prepared from the corresponding casting solution, which includes: 10% polyvinyl chloride, 10% hydrophilic agent, 11% pore forming agent, and 69% solvent .
[0029] Wherein, the hydrophilic agent is a binary copolymer of vinyl chloride and vinyl acetate; the pore-forming agent is a mixture of polyethylene glycol and polyvinylpyrrolidone; and the solvent is a mixture of dimethylacetamide and dimethylformamide.
[0030] The preparation method of the polyvinyl chloride hollow fiber ultrafiltration membrane of the present embodiment comprises the following steps:
[0031] A, prepare film-casting solution according to each component of described weight ratio;
[0032] B. Fully stir the casting liquid at 60 degrees Celsius to remove air bubbles;
[0033] C. Pump the film-casting solution into the insert tube type hollow fiber spinneret with a traction speed of 35 m / min. After staying in the air for 1 second, ent...
no. 3 example
[0036] The polyvinyl chloride hollow fiber ultrafiltration membrane is prepared from the corresponding casting solution, which includes: 13% polyvinyl chloride, 10% hydrophilic agent, 10% pore forming agent, and 67% solvent .
[0037] Wherein, the hydrophilic agent is a binary copolymer of vinyl chloride and vinyl acetate; the pore-forming agent is a mixture of polyethylene glycol and polyvinylpyrrolidone; and the solvent is a mixture of dimethylacetamide and dimethylformamide.
[0038] The preparation method of the polyvinyl chloride hollow fiber ultrafiltration membrane of the present embodiment comprises the following steps:
[0039] A, prepare film-casting solution according to each component of described weight ratio;
[0040] B. Fully stir the casting liquid at 45 degrees Celsius to remove air bubbles;
[0041] C. Pump the film-casting solution into the tube-type hollow fiber spinneret with a traction speed of 100 m / min. After staying in the air for 0.3 seconds, enter ...
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