运用溶剂热法制得四氧化三铁微粒作为内核，在其上嫁接二氧化硅层，继续通过3-(甲基丙烯酰氧)丙基三甲氧基硅烷(MPS)对表面改性，使之可发生聚合；最后以甲基丙烯酸(MAA)为功能单体，二苯并噻吩(DBT)为模板分子，通过蒸馏沉淀法制备了磁性核-壳分子印迹聚合物微球(Fe3 O4/SiO2＠MIPs)。运用傅立叶红外光谱(FT-IR)，振动样品磁力测定(VSM)，热重分析(TGA)，紫外可见分光光度计测试其性能。并通过与非印迹聚合微球(Fe3 O4/SiO2＠NIPs)对比印证其所具有的特异性吸附。
The bare Fe3 O4 nanoparticles were endowed via the solvothermal method.Adding silica coatings to magnetite nanoparticles and using the carbon-carbon double bond on the surface of silicon dioxide (SiO2 )modi-fied by 3-(methacryloxy)propyltrimethoxysilane (MPS).Magnetic core-shell molecularly imprinted polymer microspheres (Fe3 O4/SiO2@MIPs)were prepared by distillation precipitation polymerization using dibenzothio-phene (DBT)as template molecule and methacrylic acid (MAA)as functional monomer.The core-shell struc-ture,morphology and magnetic properties of Fe3 O4/SiO2@MIPs were systematically characterized by FT-IR, VSM,TGA.The Fe3 O4/SiO2@MIPs exhibited excellent recognition and binding capacity for DBT than non-imprinted polymer (Fe3 O4/SiO2@NIPs).
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