硅胶表面3-甲基噻吩分子印迹聚合物的制备及吸附特性研究  

PREPARATION OF MOLECULARLY IMPRINTED POLYMER ON SILICA SURFACE AND ITS ADSORPTION SPECIFICITY FOR 3-METHYL THIOPHENE

作　　者：胡廷平[1] 李成伟[1] 郑立辉[1] 郑洁[1] 王敏[1] 

机构地区：[1]武汉轻工大学化学与环境工程学院,武汉430023

出　　处：《离子交换与吸附》2015年第3期250-259,共10页Ion Exchange and Adsorption

基　　金：湖北省教育厅科技重点项目(20101706)

摘　　要：采用γ-氨丙基三乙氧基硅烷对硅胶微球表面进行接枝修饰,然后以甲基丙烯酸为功能单体,二甲基丙烯酸乙二醇酯为交联剂,甲苯为溶剂,3-甲基噻吩为模板分子,在硅胶微球表面聚合,得到3-甲基噻吩的硅胶微球表面分子印迹聚合物,用红外光谱进行结构表征。通过考察模板分子、功能单体、交联剂、溶剂的用量等对吸附容量的影响,得到3-甲基噻吩、甲基丙烯酸、二甲基丙烯酸乙二醇酯、甲苯适宜的摩尔聚合比,以此配比合成了3-甲基噻吩表面印迹聚合物,在模拟汽油中,研究了该聚合物对3-甲基噻吩的吸附动力学、吸附选择性、竞争性及再生性能。结果表明,分子印迹聚合物对3-甲基噻吩具有良好的吸附选择性和再生性能,最大吸附容量可达85mg/g,有望将其用于汽油中噻吩类硫的深度脱除,从而弥补加氢脱硫缺陷。Based on grafting modification of silica microsphere surface with γ-aminopro-pyltriethoxysilane, surface molecularly imprinted polymers for 3-methyl thiophene were prepared with methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross-linker, toluene as solvent, and 3-methyl thiophene as template molecule. The final products were characterized with FT-IR. The effect of dosages of template molecule, functional monomer, cross-linker and solvent on adsorption capacity was investigated to determine the suitable molar ratio of template molecule, functional monomer, cross-linker and solvent for polymerization. Adsorption kinetics, static adsorption selectivity, competive adsorption and regenerability were also studied in simulated gasoline. The results showed that the molecularly imprinted polymer had good selectivity for 3-methyl thiophene with adsorption capacity of 85mg/g, which may provide an alternative for removing thiophenic sulfur compounds from gasoline and improving the methodology of gasoline deep hydrodesulfurization.

关 键 词：分子印迹聚合物 3-甲基噻吩 硅胶 模拟汽油 

分 类 号：O631.3[理学—高分子化学]