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首页> 外文期刊>Journal of Materials Science >Two-step synthesis of polyacrylamide/polyacrylate interpenetrating network hydrogels and its swelling/deswelling properties
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Two-step synthesis of polyacrylamide/polyacrylate interpenetrating network hydrogels and its swelling/deswelling properties

机译：聚丙烯酰胺/聚丙烯酸酯互穿网络水凝胶的两步合成及其溶胀/溶胀性能

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摘要

A two-step polymerization technique is introduced to synthesize polyacrylamide/polyacrylate interpenetrating network (PAM/PAC IPN) hydrogels. The swelling ratio of the IPN hydrogel increases with the increase of the PAC content in PAM/PAC, and is smaller than the traditional PAM or PAC superabsorbents. A non-Fickian mechanism is observed in the swelling process, and the swelling changes from non-Fickian mechanism to Fickian mechanism with the increase of polyacrylate dosage in the hydrogel. The IPN hydrogel has typical pH-sensitivity and on-off effect. The deswelling properties and methyl orange dye removal are carried out based on the chelation of the carboxylic/carboxylate groups on the hydrogels with multivalent cations in solution. The hydrogel is expected to be used in the removal of heavy metal ions and dyes.
机译：引入了两步聚合技术来合成聚丙烯酰胺/聚丙烯酸酯互穿网络（PAM / PAC IPN）水凝胶。 IPN水凝胶的溶胀率随PAM / PAC中PAC含量的增加而增加，并且小于传统的PAM或PAC超吸收剂。在溶胀过程中观察到非菲克机理，并且随着水凝胶中聚丙烯酸酯剂量的增加，溶胀从非菲克机理转变为菲克机理。 IPN水凝胶具有典型的pH敏感性和开关作用。溶胀性和甲基橙染料的去除是基于水凝胶中的羧酸/羧酸根与溶液中的多价阳离子的螯合来进行的。该水凝胶有望用于去除重金属离子和染料。

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