Polyvinyl alcohol (PVA) is a water-soluble polymer material that is widely used. The hydrogel prepared from it is a gel with water as the medium. It is a polymer network system that can maintain a certain shape and have a series of unique properties. In addition to the properties of general gels, PVA hydrogels also have the advantages of low toxicity, good mechanical properties (high elastic modulus and high mechanical strength), large water absorption and good biocompatibility.
They have a wide range of applications in the biomedical field. application.
For example: drug sustained-release carriers and microcapsules; application in wound dressings; artificial organs and tissues; used in orthopedic surgery to repair or replace articular cartilage.
Preparation method of PVA hydrogel
Physical cross-linking method: repeated freezing method, partial freezing and dehydration method.
Chemical cross-linking method: chemical reagent cross-linking, radiation cross-linking.
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