Polyvinyl alcohol hydrogel and preparation method thereof

The invention discloses polyvinyl alcohol hydrogel and a preparation method thereof and belongs to the field of biological materials. The polyvinyl alcohol hydrogel is prepared by adopting agarose AG as a pore-forming agent, adopting polyvinyl alcohol as a matrix, freezing and thawing. The polyvinyl alcohol hydrogel is prepared from the following components, counted by 100 parts by mass, 15 to 20 parts of the polyvinyl alcohol, 2 to 6 parts of the agarose and the balance of deionized water. The preparation method comprises the following steps: firstly, completely dissolving the polyvinyl alcohol into the deionized water, then adding the agarose and uniformly mixing; carrying out processes such as defoaming, freezing, thawing and eluting on a mixed solution to obtain the polyvinyl alcohol hydrogel with high strength and a porous structure. The preparation method disclosed by the invention is simple; the obtained hydrogel has the advantages of simple formation and stable structure; mechanical properties and the