Shaped article made of porous hydrogel, manufacturing process therefor and use thereof
AssigneeKuraray Co., Ltd.
InventorsTatsuya Oka, Arata Ishiodori, Mototsugu Yoshihara
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Abstract
There is provided a shaped article made of porous hydrogel that contains a polyvinyl alcohol acetalized with a dialdehyde, wherein the shaped article after freeze-drying has a pore size of 0.1 to 50 μm. Preferably, the shaped article made of porous hydrogel further contains a water-soluble polysaccharide. Also preferably, an acetalization degree of the polyvinyl alcohol is 1 to 50 mol %. Also preferably, the shaped article made of porous hydrogel is in the form of particles with a sphere-equivalent diameter of 1 to 20 mm. Such a shaped article made of porous hydrogel exhibits high strength and good survivability of microorganisms.
Claims3
A process for manufacturing a shaped article made of a porous hydrogel that comprises a polyvinyl alcohol acetalized with a dialdehyde, the process comprising
- preparing a mixed aqueous solution of a polyvinyl alcohol, a dialdehyde and a water-soluble polysaccharide,
- contacting the mixed aqueous solution with an aqueous solution of a cation-containing compound,
- gelating the mixed aqueous solution to form a shaped article, and
- contacting the resulting shaped article with an aqueous solution comprising a metal salt in 0.2 to 10 mol/L in anion equivalent with a pH of 3 or less to acetalize the polyvinyl alcohol,
- wherein the shaped article has a pore size of 0.1 to 50 μm and an acetalization degree of the polyvinyl alcohol is 1 to 15 mol %.
Dependencies are inferred from the claim text.