Hydrophilic polyethersulfone filtration membrane, process for producing the same, and dope solution
US8684188B2 · kind B2 · utility
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Key dates
| Filing date | Apr 9, 2009 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jun 24, 2030 |
Classification
- Technology area (CPC —)General
Abstract
A hydrophilic filtration membrane having high chemical resistance, high strength, high water permeability and high blocking performance, and being superior in fouling resistance is provided. A hydrophilic filtration membrane containing a hydrophilic polyethersulfone having a contact angle of 65 to 74 degree, a molecular weight of 10,000 to 100,000, and the number of hydroxy groups of 0.6 to 1.4 per 100 polymerization repeating units. The hydrophilic filtration membrane may additionally contain a polyvinylpyrrolidone having a molecular weight of 10,000 to 1,300,000.
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