甲氧基修饰的大孔交联树脂对苯酚的吸附机理

由大孔氯甲基化聚苯乙烯合成了含有悬挂醚键的甲氧基修饰的大孔交联树脂.通过化学分析(氯含量的测定)、红外光谱和元素分析等手段,确证甲氧基负载在聚苯乙烯骨架上,负载量为4.10mmol/g.测定了这种树脂对正己烷中苯酚的吸附等温线,表明其对正己烷中苯酚的吸附是放热的,随着温度的升高,吸附量逐渐降低,且吸附等温线可拟合成直线.通过吸附焓的计算、不同条件下吸附等温线的比较以及理论计算等方法,确证氢键是甲氧基修饰的大孔交联树脂吸附正己烷中苯酚的主要驱动力,树脂骨架上负载的醚氧原子与苯酚的酚羟基氢原子形成了强烈氢键.

Adsorption Mechanism of Methoxy Modified Macroporous Crosslinked Resin for Phenol

Methoxy modified macroporous crosslinked resin was prepared from macroporous crosslinked chloromethylated polystyrene.Its chemical structure was characterized by chemical analysis(measurement of chlorine content), infrared spectrum and elemental analysis, and it was shown that 4.10 mmol/g of methoxy groups were uploaded onto the skeleton of polystyrene.The adsorption isotherms of the obtained resin for phenol were measured in hexane and it was seen that the adsorption isotherms could be correlated to straig...