New one-step process for preparation of microporous composite polysulfone/polyurethane hollow-fiber membranes
✍ Scribed by Thanh D. Nguyen; Barry A. Solomon
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 391 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0011-9164
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✦ Synopsis
Microporous composite polysulfone/polyurethane hollow-fiber membranes were prepared by using a low reactivity polyurethane prepolymer in the casting solution and precipitating the membrane in a precipitation solution containing a polymerization catalyst . The catalyst was used to promote the polymerization of prepolymer at the membrane/precipitation solution interface causing formation of an interfacial interpenetrating polymer network . As a result, an ultra-thin layer of hydrophilic polysulfone/ polyurethane composite polymer was constituted in situ on the surface of the polysulfone microporous substrate during membrane formation . Membranes with nominal pore sizes ranging from 0 .1-0 .45 µn1 were prepared using this technique . The resulting membranes exhibited excellent fluxes and very low protein adsorption characteristics .