| Magnetic polymer composite microspheres possess various functional group onits surface and can be moved and orientated under magnetic field, which have shownpromising prospect in scientific researchs and practically applications such as inmagnetic materials, biomedicine and separation engineering, et al. Molecularimprinting technique (MIT) is a artificial technique originated from bionic to preparepolymers with recognition specificity to template molecules.In this thesis, preparations of Fe3O4 nanoparticles by precipitation method andpreparations of ferrofluids with Fe3O4 nanoparticles are researched, and then makingof Fe3O4/poly-trimethylolpropane trimethacrylate magnetic composite microspheresby emulsion polymerization and suspension polymerization are investigated. Afterthat, manufactures of molecularly imprinted Fe3O4/poly-trimethylolpropanetrimethacrylate magnetic composite microspheres using MIT have also been tried andits molecular recognitions are being discussed simply.The results showed that precipitation method produces Fe3O4 nanoparticles with adiameter of 20nm and the nanoparticles can be made into ferrofluids withsupraparamagnetic, which is fit to be magnetic component of magnetic polymercomposite microspheres;and with carefully controlling the conditions ofpolymerization, various kind of Fe3O4/poly-trimethylolpropane trimethacrylatemagnetic composite microspheres also can be made.On the ground of results of previous work, we prepared Tyrosine and Anilinemolecularly imprinted Fe3O4/poly-trimethylolpropane trimethacrylate magneticcomposite microspheres and found that the composite beads hardly have molecularrecognition in aqueous systems and possess molecular recognition in toluene, whichmean that it is feasible to provide Fe3O4/poly-trimethylolpropane trimethacrylatemagnetic composite microspheres with molecular recognition by MIT, but themolecular recognition of the composite microspheres is influenced greatly by thesolvent. |
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