Polymethyl methacrylate membrane

Details Polymethyl methacrylate membrane Polymethyl methacrylate membrane

1981-06-29

1984-03-27

Spear, Jr., Frank A.

Liquid purification or separation

Filter

Material

264178F, B01D 3100

Patent

active

044393229

ABSTRACT:
A membrane for microfiltration, ultrafiltration or dialysis comprises a methyl methacrylate copolymer containing about 0.5 to 10 mol % of a monomer having sulfonate groups, and a methyl methacrylate copolymer containing about 0.5 to 10 mol % of a monomer having quaternary nitrogen-containing groups. It is manufactured by mixing those copolymers, dissolving the mixture in a solvent such as dimethylsulfoxide or dimethylformamide, and forming a membrane from a solution of the copolymers by casting or spinning. The membrane is particularly suitable for use in the purification of blood, and its most preferable form is hollow fibers. A method of preparing hollow fibers comprises extruding the copolymer solution through a spinneret having an annular orifice defined by a thin central tube while a liquid or gas is being injected into the central tube, and coagulating the extrusion product.

REFERENCES:
patent: 3276598 (1966-10-01), Michaels et al.
patent: 3546142 (1967-01-01), Michaels et al.
patent: 3615024 (1971-10-01), Michaels
patent: 4035459 (1977-07-01), Kesting
patent: 4127625 (1978-11-01), Arisaka et al.
patent: 4262041 (1981-04-01), Eguchi et al.

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