Process for preparing an artificial biological membrane

Details Process for preparing an artificial biological membrane Process for preparing an artificial biological membrane

1986-01-08

1989-02-28

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

424 78, 424 81, 424423, 424424, 623 66, 623901, 2523151, 264234, 264237, 264345, 264348, 264DIG60, C08J 500, C08J 300, C08J 318

Patent

active

048083534

ABSTRACT:
A process for preparing an artificial biological membrane in which an aqueous solution containing 6 wt % or more of polyvinyl alcohol having a degree of hydrolysis of not less than 95 mol % and an average polymerization degree of not less than 700 and containing a biological substance or a substance which does not hinder the gelation of the polyvinyl alcohol is subjected to a freezing step followed by a thawing step. Then, the mass thus obtained is further subjected to at least one additional cyclic processing step including the freezing and thawing steps. The product hydrogel is hard or not too soft and not swollen in water.

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patent: 4452776 (1984-06-01), Refojo
Foakes, E. H., "Simple Method to Determine the Pre-Gelation Temp. of a PVC Plastisol", British Plastics, 2/66.

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