中文摘要：

采用化学共沉淀法制备Fe3O4磁性纳米粒子,以3G氨丙基三乙氧基硅烷（APTES）对其表面进行氨基硅烷化改性,形成Fe3O4＠SiO2-NH2纳米粒子.以其作为磁性核,采用表面印迹技术,以罗丹明6G 为模板,丙烯酰胺（AM）为功能单体,三羟甲基丙烷三甲基丙烯酸酯（TRIM）为交联剂,在Fe3O4＠SiO2-NH2表面形成罗丹明6G 分子印迹聚合膜,制备了核G壳型罗丹明6G 磁性分子印迹聚合物（Fe3O4＠MIPs）,对合成条件进行了优化. 分别采用红外光谱（FTGIR）、场发射扫描电镜（FESEM）、振动样品磁强分析（VSM）和热重分析（TGA）等仪器分析手段,对Fe3O4＠MIPs的结构进行表征.结果表明,所制备的核G壳型磁性分子印迹聚合物具有高吸附容量及显著选择性;在外加磁场作用下Fe3O4＠MIPs可快速与样品基质分离,大大提高了实验效率.Fe3O4＠MIPs作为一种新型固相萃取材料,可以从样品中选择性分离和富集违规添加的罗丹明6G,可应用于食品的安全检测.

英文摘要：

Fe3 O4 magnetic nanoparticles were synthesized by the chemical co-precipitation method.With (3-aminopropyl)triethoxysilane (APTES)on the surface modification,Fe3 O4 @SiO2-NH2 nanoparticles were formed.Core-shell magnetic molecularly imprinted polymers (Fe3 O4@MIPs)were prepared by using Rhoda-mine 6G as template molecule,acrylamide (AM)as functional monomer,trimethylolpropane trimethacrylate (TRIM)as cross-linking agent,and amino-modified Fe3 O4 magnetic nanoparticles as the magnetic core.The Fe3 O4@MIPs were characterized using a Fourier transform infrared spectrometer(FT-IR),field emission scan-ning electron microscope (FESEM),vibrating sample magnetometer(VSM),and thermogravimetric analysis (TGA).The Fe3 O4@MIPs showed a highly improved imprinting capacity and significant selective;they could be used as solid-phase extraction material and applied to the safety detection of illegal add Rhodamine 6G in foods.