| 摘要 |
<p>A membrane according to the current invention includes a two layer structure, the first comprising a durable, hydrophilic, highly porous asymmetric membrane of polyacrylonitrile or similar hydrophilic polymer or polymer blends having an integrally embedded backing material, which bears a second layer, primarily consisting of highly crosslinked polyvinylalcohol as the primary selective layer.</p> |
