利用化学交联和循环冰冻-解冻相结合的顺序逼近法,制备了由聚乙烯醇(PVA)和聚丙烯酸(P AA)复合的具有互穿聚合物网络(IPN)结构的高分子水凝胶.研究了交联剂含量、PAA含量和温度对水凝胶溶胀性质的影响.实验结果表明,30 ℃时,交联剂含量为1.0 mol%的凝胶溶胀度最大,凝胶中PAA含量越大,凝胶的溶胀度越大;具有IPN结构的凝胶具有温度敏感性质; 调节凝胶中PAA和交联剂的含量,可以控制凝胶突变体积的大小.
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