Selectively transmissive polysulfonic hollow fiber membrane

Details Selectively transmissive polysulfonic hollow fiber membrane Selectively transmissive polysulfonic hollow fiber membrane

1992-03-30

1995-07-25

Cannon, James C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

21050023, 21050041, 210504, 428398, B32B 514, D02G 300, B01D 3914

Patent

active

054360684

ABSTRACT:
A hollow polysulfonic fiber intended for a selectively transmissive membrane contains a hydrophilic polymer which is cross-linked into a water-insoluble form (for example polyvinylpyrrolidone) and is used in the form of a hydrogel containing water. A method for the production of a membrane module consists in spinning a hollow fiber by the use of a spinning solution containing a polysulfonic resin and a hydrophilic polymer, wetting the fiber above the saturated moisture content, and then, with the wet condition maintained, subjecting the fiber to the processes of module molding and radiation induced cross-linking, these processes being performed in either order. The method provides a selectively transmissive hollow polysulfone fiber membrane which displays less elution into water and a sharp molecular weight fractionation, so as to be usable safely in the fields of medicine and foodstuffs.

REFERENCES:
patent: 4113912 (1978-09-01), Okita
patent: 4798847 (1989-01-01), Roesink et al.
patent: 4876289 (1989-10-01), Itoh et al.
patent: 4957942 (1990-09-01), Yoshida et al.
patent: 5104729 (1992-04-01), Stedronsky
patent: 5160627 (1992-11-01), Cussler et al.

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