Method for production of hydrophilic porous membrane of polyviny

Details Method for production of hydrophilic porous membrane of polyviny Method for production of hydrophilic porous membrane of polyviny

1990-02-26

1991-07-16

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Including surface treatment of porous body

264 41, 264232, 264340, 21050042, B29C 6720

Patent

active

050323318

ABSTRACT:
A method for the production of a hydrophilic porous membrane of polyvinylidene fluoride excelling in perviousness to water and other various properties and enjoying high commercial value, having uniform hydrohilicity imparted to the surface of pores therein, which porous membrane is characterized by the fact that the reflection spectrum thereof in the visible zone is substantially unchanged from that which existed before the treatment for impartation of hydrophilcity. The method for the production of the hydrophilic porous membrane is characterized by chemically treating the porous membrane is a strong alkali solution containing an oxidizing agent.

REFERENCES:
patent: 4189369 (1980-02-01), Fang
patent: 4774132 (1988-09-01), Joffe et al.
Kise et al., Journal of Polymer Science, Polymer Chemistry Ed., vol. 21, pp. 3443-3451, 1983.

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