【摘要】 以碳酸钙与聚乙烯共混物为原料制备聚乙烯基多孔纤维,并经接枝苯乙烯和氯甲基化、胺化,制备了离子交换纤维.应用静态法对离子交换纤维吸附甘草酸过程进行优化,在最佳条件下考查了溶液质量浓度和吸附温度对吸附速率的影响,并用动边界模型描述了吸附过程的动力学,从而推出了离子交换纤维交换过程的表观活化能39.84 kJ/mol、反应级数1.804、速率常数9.89×10-5和动力学总方程.更多还原

【Abstract】 Porous polyethylene fibers were prepared by using mixture of PE and calcium carbonate as raw materials.PE-based anion ion exchange fibers were prepared by grafting of styrene followed by aminating.The adsorption conditions of glycyrrhizic acid by ion exchange fibers were optimized in the static adsorption method.The influence of glycyrrhizic acid concentration and temperature on the ion exchange rate was also investigated under optimal reaction conditions.Moving boundary model was applied to describe the kinetics of the adsorption process.For the dominant procedure of exchange process through ion exchange fiber,the apparent activation energy(39.84 kJ/mol),reaction order(1.804),rate constant(9.89×10-5) and total kinetics equation were obtained.更多还原