反应介质对硅烷基磁性纳米粒子表面修饰磷酸胆碱后稳定性的影响  

Relationship Between Reaction Media and Stability of Magnetic Nanoparticles Grafted PMPC by ATRP Method

作　　者：孙晓燕[1] 于寿山[1] 万家齐[1] 陈克正[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2013年第2期111-115,共5页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51072087)

摘　　要：通过改变反应介质,采用原子转移自由基聚合(ATRP)法在硅烷基Fe3O4纳米粒子表面修饰2-甲基丙烯酰氧乙基磷酸胆碱(PMPC),并对复合粒子的稳定性进行观察比较。通过红外光谱、透射电子显微镜、动态光散射手段,对复合粒子进行结构、形貌和尺寸的表征。与单纯用水作反应介质相比,用乙醇和水的混合溶液作反应介质所得到的复合粒子分散性更好,稳定性也更高,为进一步研究ATRP法中单体和引发剂对复合纳米粒子的分散性和稳定性的影响打下了基础。Abstract. Poly（2-methacryloyloxyethyl phosphorylcholine） （PMPC） was grafted on si- lane-terminated Fe3O4 nanoparticles by conventional atom transfer radical polymerization （ATRP）. Effects of the solvents on the dispersion and stability of the composite nanop- articles were investigated. The obtained particles size and size distribution were analyzed by a laser diffraction particle size analyzing method using ZETASIZER. The morpholo- gy was characterized by transmission electron microscopy. The diffused reflection Fou- rier transform infrared spectroscopy was used to confirm the grafting reaction. The com- posite nanoparticles thus prepared showed exceptional dispersion and stability in mixture sol- vents of water and ethanol unlike in the single water which tend to flocculate. The resulting data provide further insight into the properties of monomer and initiator of ATRP that consid- erably reflect the dispersion and stability of composite nanoparticles.

关 键 词：反应介质 水 乙醇 硅烷偶联剂 磷酸胆碱 原子转移自由基聚合 

分 类 号：TQ153.2[化学工程—电化学工业]