Macroporous asymmetrical hydrophilic membrane made of a syntheti

Details Macroporous asymmetrical hydrophilic membrane made of a syntheti Macroporous asymmetrical hydrophilic membrane made of a syntheti

1982-12-10

1988-01-19

Sadowski, David

Liquid purification or separation

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Material

21050033, 21050038, 21050041, 21050042, B01D 1304

Patent

active

047203439

ABSTRACT:
Disclosed are asymmetrical macroporous membranes based on a synthetic polymer comprising a polymeric mixture of 5 to 70% by weight polyvinylpyrrolidone having a molecular weight .gtoreq.100,000 Dalton and 95 to 30% by weight of a polymer selected from a group consisting of a polysulfone, a polyether sulfone and an aromatic or araliphatic polyamide, each of the percentages by weight being relative to the total weight of the polymeric mixture. The membrane has a water absorbency of at least 11% by weight of water, relative to its total weight, at 100% relative humidity and 25.degree. C. Also disclosed is a process for preparation of the membranes.

REFERENCES:
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patent: 3775308 (1973-11-01), Yasuda
patent: 4026977 (1977-05-01), Bourganel
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patent: 4207182 (1980-06-01), Marze
patent: 4208508 (1980-06-01), Hashino
patent: 4229291 (1980-10-01), Walch et al.
patent: 4230583 (1980-10-01), Chiolle et al.
Cabasso et al., "Porosity and Pore Size Determination in Polysulfone Hollow Fibers", J. of Applied Polymer Science, vol. 21, 1883-1900 (1977).
Cabasso et al., "Polysulfone Hollow Fibers. I. Spinning and Propertie", J. of Applied Polymer Science, vol. 20, 2377-2394 (1976).
W. Pusch and A. Walch, "Synthetic Membranes: State of the Art," Desalination, vol. 35 (1980), pp. 5-20.
Tadashi Uragami et al., "Studies on Synthesis and Permeability of Special Polymer Membranes," Polymer Bulletin, vol. 4 (1981), pp. 617-622.

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