中文摘要：

以水-乙腈为溶剂、离子液体[Bmim]Br作为助溶剂,L-天冬酰胺（L-Asn）为模板分子,4-乙烯基吡啶为功能单体,乙二醇二甲基丙烯酸酯为交联剂,使用沉淀聚合法制备得到分子印迹聚合物L-Asn-MIPs-IL。采用SEM对其形貌进行了表征,并研究了[Bmim]Br在印迹聚合物制备中的作用以及L-Asn-MIPs-IL对L-Asn的吸附识别性能。结果表明,与用水-乙腈作溶剂制备的L-Asn-MIPs相比,L-Asn-MIPs-IL具有粒径小、产率高、比表面积大、吸附量高（饱和吸附量为15.49mg/g）、吸附速率快（160min达到吸附平衡）、识别性能强（L-Asn与L-精氨酸L-Arg之间的分离因子为1.68）和对映体拆分性能优良（相对于D-Asn）的优点。

英文摘要：

The molecularly imprinted polymers （L-Asn-MIPs-IL）were firstly prepared by precipitation polymer-ization using 4-vinylpyridine（4-VP）as functional monomers and ethylene glycol dimethyl acrylate（EGDMA）as cross-linker in the presence of L-Asparagine as template molecule in aqueous-acetonitrile and 1-butyl-3-methy-limidazolium bromide [Bmim]Br solution.The scanning electron microscopy （SEM）exhibited that the L-Asn-MIPs-IL were small particles with narrow particle size distributions.Compared with that of the molecularly im-printed polymers （L-Asn-MIPs）synthesized in aqueous-acetonitrile solution without [Bmim]Br,the yield and specific surface area of L-Asn-MIPs-IL was significantly higher.The results showed that L-Asn-MIPs-IL for L-Asn possessed higher saturation adsorption amount,faster adsorption speed,better selective adsorption capaci-ty and finer separation property for the enantiomers of Asparagine compared to L-Asn-MIPs.The equilibrium adsorption amount in 100 mg/L L-Asn solution was 15.49 mg/g,the adsorption equilibrium can be reached within 160 min and the separation factor between L-Asn and L-Arg was 1.68.