Preparation method of composite hollow fiber membrane
A fiber membrane and hollow technology, applied in the field of polymer material preparation, can solve the problems of poor pollution resistance, low flux, low mechanical strength, etc., and achieve the effects of pollution-resistant cleaning, large flux, and good mechanical properties.
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Embodiment 1
[0028] The preparation method of composite hollow fiber membrane comprises the following steps:
[0029] Step 1: Prepare the casting solution by stirring and blending 13% of the polymer material, 75% of the solvent, 2% of the additive and 10% of the chemical reaction porogen at a temperature of 60°C for 12 hours, and standing at a constant temperature of 60°C to remove Soak for 25 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:6, and the solvent is N-methylpyrrolidone and sulfolane in a mass ratio of 3:1, the additive is a mixture of lauryl amidopropyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3, and the chemical reaction causes The pore agent is a mixture of methylcellulose, titanium dioxide, and aluminum oxide at a mass ratio of 5:2:2.
[0030] Step 2: prepare the core liquid and the outer gel bath; the composition...
Embodiment 2
[0034] The preparation method of composite hollow fiber membrane comprises the following steps:
[0035] Step 1: Prepare the casting solution by stirring and blending 27% of the polymer material, 60% of the solvent, 5% of the additive and 8% of the chemical reaction porogen at a temperature of 60°C for 18 hours, and standing at a constant temperature of 70°C to remove Soak for 36 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:15, and the solvent is N-methylpyrrolidone and sulfolane in a mass ratio of 3:1, the additive is a mixture of lauryl amidopropyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3, and the chemical reaction causes The pore agent is a mixture of methylcellulose, titanium dioxide, and aluminum oxide at a mass ratio of 5:2:2.
[0036] Step 2: preparing core liquid and outer gel bath; the composition of th...
Embodiment 3
[0040] The preparation method of composite hollow fiber membrane comprises the following steps:
[0041] Step 1: Prepare the casting solution by stirring and blending 18% of the polymer material, 68% of the solvent, 7% of the additive and 7% of the chemical reaction porogen at a temperature of 65°C for 16 hours, and standing at a constant temperature of 65°C to remove Soak for 28 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:10, and the solvent is N-methylpyrrolidone and sulfolane in a mass ratio of 3:1, the additive is a mixture of lauryl amidopropyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3, and the chemical reaction causes The pore agent is a mixture of methylcellulose, titanium dioxide, and aluminum oxide at a mass ratio of 5:2:2.
[0042] Step 2: preparing core liquid and outer gel bath; the composition of the ...
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