BENZOCROWN ETHER GRAFT POLYMER WITH LITHIUM ISOTOPIC SEPARATION EFFECT AND PREPARATION METHOD THEREOF
申请人:TIANJIN POLYTECHNIC UNIVERSITY
公开号:US20150152201A1
公开(公告)日:2015-06-04
Disclosed in the present invention is a benzocrown ether graft polymer with a lithium isotopic separation effect and a preparation method thereof. The polymer is a benzocrown ether graft polymer formed by the linkage of chemical bonds, which takes the main chain of a polymer containing chloromethyl group, chloroformyl group or hydroxyl group as main chain, and takes a benzocrown ether as pendant group. The preparation process of the polymer comprises the following steps: preparing polymer solution with certain concentration by dissolving a polymer containing chloromethyl group, chloroformyl group or hydroxyl group in a solvent; then blending a catalyst and a benzocrown ether containing carboxyl group or aldehydyl group and dissolving in the polymer solution containing hydroxyl group, or blending an acid-binding agent and a benzocrown ether containing amino group or hydroxyl group and dissolving in the polymer solution containing chloromethyl group or chloroformyl group, reacting at a certain temperature and for a certain time, linking the benzocrown ether to the main chain of polymer by chemical bonds, and precipitating by adding a precipitating agent to obtain the graft polymer. The grafting polymer has excellent characteristic of lithium isotopic separation.
本发明揭示了一种具有锂同位素分离效应的苯并冠醚嫁接聚合物及其制备方法。该聚合物是由化学键连接形成的苯并冠醚嫁接聚合物,其以含氯甲基基团、氯甲酰基团或羟基基团为主链的聚合物为主链,并以苯并冠醚为挂链基团。聚合物的制备过程包括以下步骤:通过在溶剂中溶解含有氯甲基基团、氯甲酰基团或羟基基团的聚合物,制备一定浓度的聚合物溶液;然后将催化剂和含有羧基或醛基的苯并冠醚混合并溶解于含有羟基的聚合物溶液中,或将酸中和剂和含有氨基或羟基的苯并冠醚混合并溶解于含有氯甲基或氯甲酰基的聚合物溶液中,在一定温度和时间下反应,通过化学键将苯并冠醚连接到聚合物的主链上,并通过加入沉淀剂使其沉淀,以获得嫁接聚合物。该嫁接聚合物具有优异的锂同位素分离特性。