Reinforced tubular porous body compound film, method of preparing the same and use thereof
A porous body and composite membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as difficulty in improving membrane water permeability, clogging of internal channels of braids, and membrane defects.
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[0060] Examples:
[0061] The hollow braid is woven from 110 polyester monofilaments of 130 dtex, with an inner diameter of 1.0 mm and an outer diameter of 2.2 mm.
[0062] The composition of the polymer film liquid I is as follows: 14% by weight polyvinylidene fluoride, 8% by weight polyvinylpyrrolidone, 6% by weight polyethylene glycol, 0.5% by weight lithium chloride, 1% by weight Tween, 0.5% by weight water , 70% by weight N, N-dimethylacetamide.
[0063] The composition of the polymer film liquid II is as follows: 18% by weight polyvinylidene fluoride, 9% by weight polyvinylpyrrolidone, 8% by weight polyethylene glycol, 1% by weight lithium chloride, 2% by weight Tween, 0.5% by weight water , 61.5% by weight of N,N-dimethylacetamide.
[0064] The composition of the core liquid is: 10% by weight of polyvinylpyrrolidone and 90% by weight of N,N-dimethylacetamide.
[0065] The composition of the coagulation bath is 20% by weight of dimethylacetamide and 80% by weight of water.
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