第 48 卷第 5 期 Vol. 48 No. 5 2018 年 10 月 Oct 2018

所属栏目：功能材料 复合材料PSSS／SiO2对溶菌酶吸附性能的研究

雷青娟，张正国* （中北大学 理学院化学学科部，山西 太原 030051）

摘　要：在活化硅胶表面使单体对苯乙烯磺酸钠（SSS）发生接枝聚合，制得复合材料PSSS／SiO2。测定了PSSS／SiO2的红外光谱和Zeta电位，探索了复合材料PSSS／SiO2对溶菌酶的吸附行为与吸附机理，考察了温度和体系的pH对吸附性能的影响。实验结果表明：在较大的pH范围内，复合材料PSSS／SiO2表面携带有高密度的负电荷；凭借静电相互作用，复合材料PSSS／SiO2对溶菌酶表现出吸附能力；复合材料PSSS／SiO2对溶菌酶的吸附量随着体系pH值的增大，呈现出先增大后减小的趋势。在pH=9处，吸附容量达68 mg·g-1；温度升高，吸附容量减小。

关键词：溶菌酶；对苯乙烯磺酸钠；复合材料；吸附

中图分类号：TM53　　文献标识码：A　　文章编号：1009-9212（2018）05-0034-05

Study on Adsorption Behavior of the Complex Materials PSSS/SiO2 for Lysozyme

LEI Qing-juan, ZHANG Zheng-guo* (Department of chemistry, School of science, Northuniversity of China, Taiyuan 030051, China)

Abstract：Sodium p-styrenesulfonate(SSS) was graft-polymerized onto the surfaces of silica gel particles, resulting in the complex materials PSSS/SiO2. The infrared spectrum of PSSS/SiO2 was determined. At the same time, Zeta potential of the complex materials PSSS/SiO2 was also determined. The adsorption properties of the complex materials PSSS/SiO2 towards lysozyme was studied. The effects of the emperature and the systematic pH on the adsorption property of PSSS/SiO2 were studied. The experimental results show that the complex materials PSSS/SiO2 has higher density of negative charge on the surfaces in a wide pH range. By right of the electrostatic interaction, the complex materials PSSS/SiO2 exhibit adsorption ability for the lysozyme. The adsorption capacity of PSSS/SiO2 for lysozyme first increases and the decreases withthe increase of the systematic pH, and the adsorption capacity has a maximum value at pH=9. The maximum adsorption capacities for lysozyme is 68 mg·g-1, respectively. Raising temperature leads to the decrease of the adsorption capacity causes the decrease of the adsorption capacity.

Key words：lysozyme; sodium p-styrenesulfonate; complex materials; adsorption

作者简介：雷青娟（1977-），女，山西平遥人，博士，研究方向：功能高分子材料（E-mail：leiqingjuan@nuc.edu.cn）。

联 系 人：张正国，副教授，研究方向：功能高分子材料（E-mail：zhangzhengguo@nuc.eu,cn）。

收稿日期：2018-10-12