液蜡为分散相,span80分不散剂,乙二醇为致孔剂,反相悬浮法制备了羟基修饰氢键型酚醛树脂LM-4.根据热力学分析,苯胺和苯在LM-4上的吸附焓和吸队熵均在零,表明吸附包含解吸水分子和吸附吸附质两个过程.对苯胺的吸附焓达到34.06kJ/mol,说明树脂与苯胺的分子间存在氢键.Lagergren模型拟合吸附动力学数据表明颗粒内散、膜扩散均是速率控制步骤之一,Dumwald-Wagner二级速率方程更适合于描述LM-4对苯的吸附,Kannan-Sundaram模型的拟合则说明树脂对苯胺的吸附为"优惠吸附".
参考文献
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