Method for enhancing membrane separation
First Claim
1. A method for enhancing the selectivity for fluid separation of a membrane in which the material of the membrane significantly effects the fluid separation, said membrane having a barrier layer with pores therethrough which adversely affect the selectivity of fluid separation and said membrane being resistant to biodegradation, comprising storing the membrane in an aqueous medium having an essential absence of a bacteriostat for a time sufficient to provide growths of microorganisms and thus enhance the selectivity of fluid separation of the membrane.
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Abstract
The selectivities of fluid separations of membranes having pores, in which the material of the membranes significantly effects the fluid separations, can be enhanced by the storage of the membranes in water. Suitable materials of the membranes for improvement in accordance with this invention are those which are not unduly susceptible to biodegradation. The membranes for improvement in accordance with this invention preferably have structures which are not unduly affected by drying and thus maintain beneficial mechanical and fluid separation properties after drying.
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Citations
25 Claims
- 1. A method for enhancing the selectivity for fluid separation of a membrane in which the material of the membrane significantly effects the fluid separation, said membrane having a barrier layer with pores therethrough which adversely affect the selectivity of fluid separation and said membrane being resistant to biodegradation, comprising storing the membrane in an aqueous medium having an essential absence of a bacteriostat for a time sufficient to provide growths of microorganisms and thus enhance the selectivity of fluid separation of the membrane.
Specification