In-situ synthesis of PHEMA magnetic nanogels via photochemical method

作     者：GONG PeiJun SUN HanWen HONG Jun XU DongMei YAO SiDe 

作者机构：Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China Graduate University of Chinese Academy of SciencesBeijing 100039China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2007年第50卷第2期

页      面：217-223页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Supported by the Shanghai Municipal Commission for Special Project of Nanometer Science and Technology (Grant No. 0452nm068) 

主　　题：magnetic nanogels photochemical polymerization 2-hydroxyethyl methacrylate superparamagnetic 

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.