新型氮杂冠醚树脂的合成与吸附性能研究

Synthesis and properties of novel azacrown ether resin

以聚乙二醇(PEG 400)为起始剂,以聚乙二醇二苯磺酸酯为中间体,以多甘胺为交联剂,用KOH做缩合催化剂,合成了新型非对称多氮杂冠醚树脂(I)和(II).测试了树脂的溶胀性能和对金属离子的吸附性能,结果表明,合成树脂在极性溶剂中具有良好的溶胀性能,20℃时在水、甲酸和乙酸中的溶胀系数分别达6.67,8.31和6.00,吸水容量达到13.54g/g;25℃时对Hg2+,Cu2+,Ni2+,Pb2+,Zn2+的吸附容量分别达1.342,1.087,1.192,0.762和0.904mmol/g.

By using polyethylene glycol (PEG400) as starting material, polyethylenglycol disulfophenglate as intermediate, polyethylenediamine as crosslinker, KOH as catalyst of polycondensation,the unsymmetrical polyazacrown ether resins (Ⅰ) and (Ⅱ) are synthesized Their swelling properties and static adsorption characters for metallic ions are measured The results show that synthetic resins have good swelling properties in the polar solvent and the swelling coefficients are 667, 831 and 600 in water, mechanic acid, ethnic acid respectively and the adsorption capacity for water is 1354 g/g at 20℃,adsorption capacities of the resins are 1342, 1087, 1192, 0762 and 0904 mmol/g for Hg2+, Cu2+, Ni2+, Pb2+ and Zn2+respectively at 25℃.