聚乙烯醇水凝胶的性能研究

目的：研究聚乙烯醇水凝胶的吸水膨胀性能特点。方法：将冷冻干燥后的PVA水凝胶浸泡于模拟体液（SBF）中再溶胀，观察不同浓度PVA水凝胶随时间的再溶胀规律；不同规格的PVA干凝胶浸泡于SBF中，比较尺寸及形状对吸水速率的影响。结果：PVA凝胶在37℃模拟体液中初始溶胀较快，10d内体积溶胀率可达5倍；表面积越大的PVA水凝胶达到平衡的速率越快。结论：本实验的PVA水凝胶在SBF中的最大体积溶胀率均大于5，可以考虑将其应用于口腔软组织增量。

Study on performance of PVA hydrogel.

Objective： to study the polyvinyl alcohol （PVA）hydrogels swell performance characteristics. Method： PVA hydrogel of freeze drying after soaking in simulated body fluid （SBF）swelling again, to observe the different concentra- tion of PVA hydrogel swelling again with the time; Different specifications of PVA dried gel soaked in SBF, to compare the effects of size and shape on the water absorption rate. Result： PVA in tile simulated body fluid gel swelling fast 37 ~C, vol- ume swelling rate canbe up to 5 times after 10 d：The greater the surface area of the PVA hydrogel to balance the faster rate. Conclusion： the experiment of the PVA hydrogel in SBF maximum volume swelling rate were greater than 5, can con- sider to aoolied to the oral soft tissue.