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以聚苯乙烯为载体 ,先将其氯甲基化 ,再利用傅 克反应进行接枝 ,合成了高聚物接枝邻苯二酚 聚苯乙烯树脂 .对合成产物氯含量进行了测定及红外光谱分析 ;测定了树脂的弱酸交换量 ;此外 ,将树脂装入离子交换色谱柱 ,用动态吸附法考察了树脂对Rb+的交换性能 .结果表明 :树脂的弱酸交换量为 2 .2 5mmol/g,适应于pH值为 6～ 13的含Rb+样品的分离 ;当样品中Rb+的浓度为 0 .0 2～ 0 .1mol/L时 ,吸附率大于 90 % ,K1>K2 >K3,且Na+,K+的浓度与Rb+的浓度越接近 ,树脂对Rb+交换选择性越好 ;树脂对铝酸钠溶液中Rb+的吸附率为 78.6 2 % ,吸附后离子的洗脱效率大于 95 % ;将再生后的树脂用于样品吸附 ,重复使用 2 0次 ,对Rb+吸附率仍保持稳定值
Polystyrene was used as the carrier, chloromethylated first, and then grafted by Friedel-Crafts reaction to synthesize a polymer-grafted catechol polystyrene resin.The content of chlorine in the synthesized product was measured and the infrared The exchange capacity of the resin to Rb + was investigated by dynamic adsorption method.The results showed that the exchange capacity of weak acid was 2.25 mmol / g , Which is suitable for the separation of Rb + -containing samples with a pH value of 6-13. When the concentration of Rb + in the sample is 0.002-0.1 mol / L, the adsorption rate is greater than 90% and K1> K2> K3, The closer the concentration of K + to the concentration of Rb +, the better the resin exchange selectivity to Rb +; the adsorption rate of Rb + to sodium aluminate solution is 78.6 2% and the ion elution efficiency is more than 95% Resin for sample adsorption, repeated use 20 times, Rb + adsorption rate remained stable