不同条件对PVA/CS复合水凝胶溶胀性能的影响

Effect of Different Conditions on the Polyvinyl Alcohol/Chitosan's Swelling

以聚乙烯醇(PVA)、壳聚糖(CS)为原料,戊二醛为交联剂,制备出PVA/CS复合水凝胶载体材料,改变PVA/CS的质量配比、交联剂含量、pH值和温度,考察了不同条件下对复合水凝胶溶胀性能的影响。结果表明,当PVA/CS质量比为3:1、交联剂体积分数为4%时所合成凝胶的溶胀性能较好;随着温度的升高,溶胀度不断减小;凝胶在酸性条件的溶胀性能远远优于碱性条件的溶胀性能。

PVA/CS composite hydrogel is prepared with polyvinyl alcohol（PVA） and chitosan（CS） as raw materials for the cross-linking agent glutaraldehyde, and change the PVA/CS ratio of quality, cross-linking agent concentration, pH value and temperature to study the composite under different conditions of water swelling properties. It shows that PVA/CS mass ratio of 3 ： 1 and crosslinker＇s volume fraction of 4% are the best condition for swelling. And the swelling capacity redues with the temperature increasing. It＇s swelling is better in acidic conditions than in al kaline.