螯合树脂研究　ⅩⅪ．互贯网络型巯基胺型树脂的合成及其性质

THE STUDIES ON CHELATING RESINS ⅩⅪ THE PREPARATION AND PROPERTIES OF IPN MERCAPTO-AMINE CHELATING RESINS

本工作制备了以大孔交联聚苯乙烯为第一网络，以由环硫氯丙烷与多乙烯多胺反应而形成的交联聚合物为第二网络的互贯型硫基胺树脂，并测定了其孔结构。该互贯型树脂与相应的凝胶型树脂相比，在酸性质中膨胀程度小得多，而对Ａｇ＾＋，Ａｕ＾３＋的吸附性能更好，对Ａｇ＾＋，Ａｕ＾３＋的吸附容量分别可达４３２ｍｇＡｇ＾＋／ｇ和５５３ｍｇＡｕ＾３＋／ｇ．对Ａｕ＾３＋的吸附率大于９９％。

PN mercapto-amine chelating resins were prepared by the reaction of chloromethylthiirane adsortal in the macroporous crosslinked polystyrene(PSt) bead as the first network with polyethylene polyamines to form acrosslinked polymers as the second network. The pore structure of the IPN chelating resins were measured. The resins show much less expanding extent in acid media and better adsorption properties for Ag￣+ and Au￣3+ than the corresponding gel chelating resins . The adsorption capacities for Ag￣+ and Au￣3+ are as high as 432mg Ag￣+/g and 553mg Au￣3+/g, respectively .The adsorption effciencies for Au￣3+ are more than 99%.