不同种类水凝胶对结晶紫染料的吸附性能研究

摘要

The four types of hydrogels using acrylamide(AM) and isopropylacrylamide(NIPAM) as monomer, methylene-bis-acrylamide (MBA) and inorganic nanoclay lithium magnesium silicate hydrate (LMSH) as chemical and physical cross-linker, respectively, were prepared by free-radical polymerization in aqueous solution. The results show that, comparing with hydrogels cross-linked by MBA, the polyAM and polyNIPAM hydrogels using LMSH as physical cross-linking agent presents higher swelling ratios and lots of pore. The adsorption amount of crystal violet (CV) on polyAM and polyNIPAM hydrogels increases 5-8 times. In terms of adsorption and using effect, polyNIPAM hy-drogel cross-linked by LMSH is the best choice for removing CV dye.%分别以丙烯酰胺(AM)和异丙基丙烯酰胺(NIPAM)为单体,以亚甲基双丙烯酰胺(MBA)为化学交联剂和无机纳米黏土硅酸镁锂(LMSH)为物理交联剂,在水溶液中采用自由基聚合制备得到4种类型水凝胶.结果表明:相比于MBA,LMSH交联的polyAM和polyNIPAM水凝胶溶胀度高,孔洞数量多,结晶紫吸附量增加5～8倍.就吸附和使用效果而言,LMSH交联的polyNIPAM水凝胶是最佳的结晶紫吸附剂.