考察了瓜胶(GG)、丙烯酸(AA)的起始加料量和溶胀介质pH对瓜胶/聚丙烯酸半互穿网络水凝胶溶胀机理及溶胀动力学的影响.结果表明:在pH=3.0时,将GG用量从0增加到25 g/L,最大溶胀率从9.93下降到2.83,对应的溶胀特征指数n由0.600减小到0.203,水的扩散趋于Fickian模式;将AA用量从125 g/L增加到375 g/L,最大溶胀率从3.14增加到4.30,n从0.484增加到0.609,水的扩散趋于non-Fickian模式;GG/PAA半互穿网络水凝胶的溶胀行为满足Schott二级动力学方程.将溶胀介质pH从3.0提高到7.4,水凝胶的溶胀率、扩散特征指数n均明显增加.因此调整GG、AA用量以及溶胀介质pH可改变体系的溶胀性能.
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