核-壳型过氧化苯甲酰印迹溶胶-凝胶聚合物的制备及应用  

Preparation and Application of Core-shell Benzoyl Peroxide Imprinted Sol-gel Polymers

作　　者：张明磊[1] 张朝晖[1,2] 张立吉[1] 刘丽[1] 聂丽华 

机构地区：[1]吉首大学化学化工学院,吉首416000 [2]化学传感与计量国家重点实验室,长沙410082

出　　处：《化学通报》2010年第2期160-165,共6页Chemistry

基　　金：湖南省自然科学基金项目(08JJ4004);湖南省教育厅优秀青年基金项目(07B061);湖南大学化学传感与计量国家重点实验室开放基金;湖南省大学生创新基金资助

摘　　要：以过氧化苯甲酰为模板分子,采用溶胶-凝胶印迹技术在自制的二氧化硅微球表面成功制备对过氧化苯甲酰具有特异性吸附能力的核-壳型印迹材料,并由红外光谱、扫描电镜和差热分析表征了印迹聚合物。该印迹微聚合物分散性好、热稳定好、平均粒径为300nm,印迹聚合物的壳层厚度为50nm。用高效液相色谱研究了印迹聚合物的吸附性能,结果表明该印迹聚合物对过氧化苯甲酰的选择系数为6.59。作为固相萃取材料,该印迹材料已被成功用于面粉中过氧化苯甲酰的分离和富集,回收率为94.98%。A novel core-shell imprinted polymer based on the surface-modified silica gel was prepared with sol- gel method successfully by using benzoyl peroxide as template molecule. The morphology and performance of the imprinted polymers were characterized by IR, SEM and thermogravimetric analysis. The results showed that the polymers were evenly distributed, good thermal stability, 300 nm of average diameter and the shell thickness is about 50 nm. The adsorption performance was investigated by HPLC, and the results turned out that the imprinted polymers exhibit specific sorption to benzoyl peroxide with selectivity coefficient 6.59 ; and the average recovery rate 94.98% was obtained by using solid-phase extraction experiments. The imprinted polymer was applied to separate and enrich benzoyl peroxide from flour successfully.

关 键 词：过氧化苯甲酰 凝胶-溶胶 分子印迹 核-壳型 

分 类 号：O631.3[理学—高分子化学]