核-壳型罗丹明6G磁性分子印迹固相萃取材料的合成与表征  

Synthesis and characterization of core-shell magnetic molecularly imprinted polymers for solid-phase extraction of Rhodamine 6G

作　　者：苏晓濛[1,2] 李小燕[1] 刘敏[1] 吴宗远[1] 罗伟强[1] 石展望[1] 

机构地区：[1]广西民族大学化学化工学院,南宁530008 [2]南京市产品质量监督检验院,南京210028

出　　处：《功能材料》2014年第23期23080-23085,23090,共7页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21165003)

摘　　要：采用化学共沉淀法制备Fe3O4磁性纳米粒子,以3-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-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(FT-IR)、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-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。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.

关 键 词：核-壳型 罗丹明6G 磁性分子印迹聚合物 固相萃取 

分 类 号：O652.6[理学—分析化学] TQ314.2[理学—化学]