Preparation of porous substrates having well defined morphology

Details Preparation of porous substrates having well defined morphology Preparation of porous substrates having well defined morphology

1988-03-21

1990-09-04

Lovering, Richard D.

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

260DIG31, 264 46, 264216, 424DIG7, 42840221, 42840222, 514963, B01J 1302, B29D 700, B32B 312

Patent

active

049543814

ABSTRACT:
A membrane of defined pore structure and controlled pore diameter and a method of preparing the membrane which comprises dispersing in a water soluble polymer solution (A) an organic polymer solution (B), the water-soluble polymer solution (A) being a non-solvent for the polymer solution (B), to form micro-spherical droplets of the polymer solution (A) which are enveloped by a solid phase consisting of a coagulated or cross-linked polymer solution (B); evenly casting the dispersion on a flat surface; and evaporating the solvent for the polymer solution (B) to form a microporous membrane comprised of the polymer (B), the porosity, pore size, and void volume of the microporous membrane being a function of the polymer (A) concentration, the microsphere dimensions and the temperature and evaporation rate. The water-soluble polymer (A) is selected from polyethyleneimine, gelatin, polyvinyl-pyrrolidone, polyvinyl pyridinium halide, polyacrylic acid, polyhydroxyethylmethacrylate (HEMA), dextran, or polyvinyl acetate. The continuous phase polymer (B) is selected from a brominated polyphenylene oxide, polyphenylene oxide, polyacetic acid, polystyrene, polyglycol acrylate (PGA), polymethylmethacrylate, cellulose acetate, polyvinyl acetate, polycarbonate and polyvinylidene fluoride.

REFERENCES:
patent: 3377190 (1968-04-01), Baguley
patent: 3460972 (1969-08-01), Nack
patent: 3567118 (1971-03-01), Shepherd et al.
patent: 4064294 (1977-12-01), Babil et al.
patent: 4177256 (1979-12-01), Michaels et al.
patent: 4269713 (1981-05-01), Yamashita et al.
patent: 4402940 (1983-09-01), Nose et al.
Chem. Abstr. 100(6) 122365b.
Chem. Abstr. 101(10) 73901h.
Chem. Abstr. 81(24) 153976v.
Chem. Abstr. 86(10) 56460t.
Chem. Abstr. 90(20) 153176v.
Chem. Abstr. 90(26) 205417w.

Affiliated with

Also associated with

Rating

Preparation of porous substrates having well defined morphology does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of porous substrates having well defined morphology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of porous substrates having well defined morphology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-441061