聚丙烯酰胺包覆磁性纳米凝胶的光化学法制备及其机理研究  

Polyacrylamide-coated magnetic nanogels:preparation via photochemical method and study of coating mechanism

作　　者：孙汉文[1] 徐冬梅[1] 孟繁宗[2] 王敦青[2] 洪军[1] 宫培军[1] 薛艳玲[1] 董黎[1] 姚思德[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]德州学院,德州253023

出　　处：《辐射研究与辐射工艺学报》2006年第5期271-274,共4页Journal of Radiation Research and Radiation Processing

基　　金：上海市科委纳米专项基金(0352nm120)资助

摘　　要：以丙烯酰胺为单体,N,N’?亚甲基双丙烯酰胺为交联剂,采用光化学方法在水溶液体系中制备了聚丙烯酰胺(Polyacrylamide,PAM)包覆的磁性纳米凝胶,用傅立叶变换红外光谱(Fouriertransforminfraredspec-troscopy,FTIR),光子相关光谱(Photocorrelationspectroscopy,PCS)和电子自旋共振(Electronspinresonance,ESR)波谱对聚丙烯酰胺磁性纳米凝胶进行了表征。研究了磁性纳米凝胶粒径随反应时间、单体浓度、交联剂浓度的变化规律,并探索了聚丙烯酰胺磁性纳米凝胶的包覆机理。Polyacrylamide-coated magnetic nanogels were synthesized via photochemical polymerization under UV light irradiation. The polyacrylamide-coated magnetic nanogels were characterized by Fourier transform infrared spectroscopy and photo correlation spectroscopy. And it was found that particle size of the polyacrylamide-coated magnetic nanogels increased with the reaction time and the monomer concentration, but decreased with increasing concentration of the cross-linker of N, N＇-Methylene-bis-（acrylamide）. The coating mechanisms were studied by ESR measurements of different samples of the nanogels.

关 键 词：聚丙烯酰胺 光化学合成 磁性纳米凝胶 电子自旋共振波谱 

分 类 号：O635[理学—高分子化学] O644.1[理学—化学]