Method for production of hydrophilic porous membrane of polyvinylidene fluoride
First Claim
1. A method for the production of hydrophilic porous membrane of polyvinylidene fluoride, comprising forming a porous membrane of polyvinylidene fluoride, impregnating an aqueous type solvent into the pores of said porous membrane, and subjecting the impregnated porous membrane to a chemical treatment in a strong alkali solution containing an oxidizing agent.
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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.
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Citations
7 Claims
- 1. A method for the production of hydrophilic porous membrane of polyvinylidene fluoride, comprising forming a porous membrane of polyvinylidene fluoride, impregnating an aqueous type solvent into the pores of said porous membrane, and subjecting the impregnated porous membrane to a chemical treatment in a strong alkali solution containing an oxidizing agent.
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