In-situ synthesis of PHEMA magnetic nanogels via photochemical method

查看全文 作　　者：GONG [1,2]PeiJun;SUN [1,2]HanWen;HONG [1,2]Jun;XU [1,2]DongMei;YAO [1]SiDe

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;[2]Graduate University of Chinese Academy of Sciences,Beijing 100039,China

出　　处：《Science China Chemistry》索引2007年第50卷第2期,共7页

基　　金：Supported by the Shanghai Municipal Commission for Special Project of Nanometer Science and Technology (Grant No. 0452nm068) 摘　　要：One-pot synthesis of magnetic nanogels via photochemical method is reported in this paper. Poly(2-hydroxyethyl methacrylate)(PHEMA) magnetic nanogels are synthesized by in-situ polymeriza-tion of 2-hydroxyethyl methacrylate(HEMA) and N,N'-methylene-bis-(acrylamide)(MBA) in Fe3O4 aqueous suspension under UV irradiation. The structure and compositions of magnetic nanogels are characterized by FTIR,TGA,SEM,TEM and PCS. TGA measurement indicates that magnetic nanogels contain 90% magnetite. Both naked Fe3O4 and magnetic nanogels are superparamagnatic at room temperature according to magnetization curves. The swollen capability of the hydrogel shell is proved by contrasting the particles sizes obtained by SEM,TEM and PCS. Particle diameters can be manipu-lated by changing monomer concentration and irradiation time. A mechanism of the coating process is proposed. 关键词：magnetic NANOGELS PHOTOCHEMICAL POLYMERIZATION 2-hydroxyethyl METHACRYLATE SUPERPARAMAGNETIC

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In-situ synthesis of PHEMA magnetic nanogels via photochemical method

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