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采用新型两步水溶液聚合法,合成聚丙烯酸盐/淀粉半互穿网络(PAA/St semi-IPN)水凝胶.研究淀粉用量、pH值和离子强度对水凝胶溶胀率和溶胀速率的影响,并采用Flory理论对水凝胶进行拟合.实验结果表明:在一价阳离子盐溶液中,水凝胶的溶胀度与Flory理论符合较好;对于高价阳离子溶液,Flory理论只能用于定性分析,而不能用于定量计算.相对于传统的水凝胶,PAA/St semi-IPN水凝胶具有较高的机械强度.最后,利用红外光谱、扫描电子显微镜和热重分析对PAA/St semi-IPN进行表征.
A novel two-step aqueous solution polymerization method was used to synthesize PAA / St semi-IPN hydrogels.The effect of starch content, pH and ionic strength on the swelling rate and swelling rate of hydrogels , And the Flory theory was used to fit the hydrogels.The experimental results show that the swelling degree of the hydrogels in the monovalent cation salt solution is in good agreement with the Flory theory and the Flory theory can only be used for the qualitative PAA / St semi-IPN hydrogels have higher mechanical strength than conventional hydrogels.Finally, PAA / St semi-IPN.