Surface-hydrophilic, highly selective semipermeable membrane

Details Surface-hydrophilic, highly selective semipermeable membrane Surface-hydrophilic, highly selective semipermeable membrane

1989-04-21

1990-08-14

Sever, Frank

Liquid purification or separation

Filter

Material

21050036, B01D 6102, B01D 6114, B01D 6124

Patent

active

049485083

ABSTRACT:
A surface-hydrophilic, highly selective semipermeable membrane comprising a semipermeable membrane of a hydrophobic polymer and a hydrophilic segment having at least one end directly bonded to at least one surface of the semipermeable membrane is disclosed. The hydrophilic segment comprises at least one methylene group or substituted methylene group which is positioned at least at one end of the segment and at least one neutral hydroxyl group. The surface-hydrophilic, highly selective semipermeable membrane not only has excellent resistance to heat and organic solvents, but also non-adsorptivity for organic substances including even ionic organic substances. Therefore, the surface-hydrophilic, highly selective semipermeable membrane of the present invention can advantageously be used for microfiltration, ultrafiltration, reverse osmosis and dialysis.

REFERENCES:
patent: 3957651 (1976-05-01), Kesting
patent: 4704321 (1987-11-01), Davis et al.
patent: 4839203 (1989-06-01), Davis et al.

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