Method for making semi-permeable polymer membranes

Details Method for making semi-permeable polymer membranes Method for making semi-permeable polymer membranes

1992-10-30

1994-01-04

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

65 31, 156643, 264 41, 2642103, 2642104, 26421119, 264344, B29C 6720, B29C 7100

Patent

active

052757668

ABSTRACT:
A method for making a semi-permeable microporous polymer sheet, useful as a separation membrane or the like, including extruding a melt-blended mixture of a high-temperature thermoplastic polymer and a leachable glass to form sheet and then leaching the glass from the sheet to leave a microporous relict polymer network, wherein the permeability of the sheet is improved by plasma-etching the surface of the sheet before or after leaching. Hydrophilic or hydrophobic porous membranes may be provided.

REFERENCES:
patent: 3992495 (1976-11-01), Sano et al.
patent: 4046843 (1977-09-01), Sano et al.
patent: 4521236 (1985-06-01), Yamamoto et al.
patent: 4853001 (1989-09-01), Hammel
patent: 5043369 (1991-08-01), Bahn et al.
patent: 5183607 (1993-02-01), Beall et al.

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