PREPARATION AND CHARACTERIZATION OF SUPERPARAMAGNETIC FUNCTIONAL POLYMERIC MICROPARTICLES  

作　　者：XianaiaoLiu HuizhouLiu JianminXing YuepingGuan ZhiyaMa GuobinShan chengliYang 

机构地区：[1]LaboratoryofSeparationScienceandEngineeringandStateKeyLaboratoryofBiochemicalEngineering,InstituteofProcessEngineering,ChineseAcademyofSciences,Beijing100080,P.R.China [2]Authortowhomcorrespondenceshouldbeaddressed.

出　　处：《China Particuology》2003年第2期76-79,共4页

基　　金：This work was financially supported by the National High Technology Research and Development Program of China(No.2002AA302211);the National Natural Science Foundation of China(No.20206032).

摘　　要：Superparamagnetic poly(styrene-divinylbenzene-glycidyl methacrylate) (Pst-DVB-GMA) microparticles were prepared via a modified suspension polymerization process. A magnetic fluid was first prepared by a chemical co-precipitation method. Then magnetic microparticles were produced by mixing the monomers and the magnetic fluid with water in the presence of a stabilizer poly(vinyl pyrrolidone) (PVP) to form a suspension, and finally benzoyl peroxide was added to initiate the co-polymerization. The morphology and magnetic properties of the microparticles were examined by TEM and VSM. The spherically shaped microparticles, with a size range of 4 to 7 urn, showed distinct Superparamagnetic characteristics. XRD was used to investigate the structure of the magnetite particles dispersed in the polymer matrix. The microparticles with epoxy groups on their surface can be applied directly to the separation of biomolecules.Superparamagnetic poly(styrene-divinylbenzene-glycidyl methacrylate) (Pst-DVB-GMA) microparticles were prepared via a modified suspension polymerization process. A magnetic fluid was first prepared by a chemical co-precipitation method. Then magnetic microparticles were produced by mixing the monomers and the magnetic fluid with water in the presence of a stabilizer poly(vinyl pyrrolidone) (PVP) to form a suspension, and finally benzoyl peroxide was added to initiate the co-polymerization. The morphology and magnetic properties of the microparticles were examined by TEM and VSM. The spherically shaped microparticles, with a size range of 4 to 7 urn, showed distinct Superparamagnetic characteristics. XRD was used to investigate the structure of the magnetite particles dispersed in the polymer matrix. The microparticles with epoxy groups on their surface can be applied directly to the separation of biomolecules.

关 键 词：PREPARATION CHARACTERIZATION magnetic fluid Pst-DVB-GMA suspension polymerization 

分 类 号：TM271[一般工业技术—材料科学与工程] O361.3[电气工程—电工理论与新技术]