Study On Medical Polyvinyl alcohol (PVA) / Polyvinyl Pyrrolidone (PVP) Hydrogel Wound Dressing

摘要

Polyvinyl alcohol (PVA)/polyvinyl pyrrolidone (PVP) hydrogel wound dressing has been fabricated using freezing-thawing method. The content of water, the rate of water absorption and pH value of hydrogel were tested, The mechanical properties and water transmissivities of hydrogels were analyzed when the PVP contents were difference. Experiments results show that the hydrogels diaphaneity is better, water contents are over 70percent;;water transmissivity of hydrogels are over 100 percent, the highest value reaches to 204 percent;;the pH value closes to the level of human body, the highest pH value reaches to 6.83;;the tensile strength of hydrogel is 0.75 MPa when PVP content is 8 percent, reaches to the largest value;;all of PVA/PVP hydrogels water transmissivities reach to 700 g.m~(-2).24h~(-1).