全文下载：2013020111
孙晓燕， 于寿山， 万家齐， 陈克正*
（青岛科技大学 材料科学与工程学院，山东 青岛 266042）
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。
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
中图分类号： TQ 153.2 文献标志码： A
Relationship Between Reaction Media and Stability of Magnetic Nanoparticles Grafted PMPC by ATRP Method
SUN Xiao-yan, YU Shou-shan, WAN Jia-qi, CHEN Ke-zheng
(CollegeofMaterials Scienceand Engineering,QingdaoUniversityof Science and Technology,Qingdao266042,China)
Abstract: Poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) was grafted on silane-terminated Fe3O4 nanoparticles by conventional atom transfer radical polymerization (ATRP). Effects of the solvents on the dispersion and stability of the composite nanoparticles were investigated. The obtained particles size and size distribution were analyzed by a laser diffraction particle size analyzing method using ZETASIZER. The morphology was characterized by transmission electron microscopy. The diffused reflection Fourier transform infrared spectroscopy was used to confirm the grafting reaction. The composite nanoparticles thus prepared showed exceptional dispersion and stability in mixture solvents 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 considerably reflect the dispersion and stability of composite nanoparticles.
Key words:reaction media; water/ethanol; silane coupling agent; phosphorylcholine; conventional atom transfer radical polymerization
收稿日期：2012-05-25
基金项目： 国家自然科学基金项目（51072087）.
作者简介： 孙晓燕（1986—），女，硕士研究生.*通信联系人.
