Makromolekulare Chemie II, Universität Bayreuth, D-95440 Bayreuth, Germany.
J Am Chem Soc. 2010 Nov 24;132(46):16587-92. doi: 10.1021/ja107132j. Epub 2010 Oct 28.
We report the preparation of water-soluble organo-silica hybrid nanotubes templated by core-shell-corona structured triblock terpolymer cylindrical polymer brushes (CPBs). The CPBs consist of a polymethacrylate backbone, a poly(tert-butyl acrylate) (PtBA) core, a poly(3-(trimethoxysilyl)propyl acrylate) (PAPTS) shell, and a poly(oligo(ethylene glycol) methacrylate) (POEGMA) corona. They were prepared via the "grafting from" strategy by the combination of two living/controlled polymerization techniques: anionic polymerization for the backbone and atom transfer radical polymerization (ATRP) for the triblock terpolymer side chains. The monomers tBA, APTS, and OEGMA were consecutively grown from the pendant ATRP initiating groups along the backbone to spatially organize the silica precursor, the trimethoxysilyl groups, into a tubular manner. The synthesized core-shell-corona structured CPBs then served as a unimolecular cylindrical template for the in situ fabrication of water-soluble organo-silica hybrid nanotubes via base-catalyzed condensation of the PAPTS shell block. The formed tubular nanostructures were characterized by transmission electron microscopy (TEM), cryogenic TEM, and atomic force microscopy.
我们报告了由核壳冠状结构三嵌段共聚物圆柱状聚合物刷（CPB）模板制备的水溶性有机硅杂化纳米管。CPB 由聚甲基丙烯酸酯主链、聚（叔丁基丙烯酰胺）（PtBA）核、聚（3-（三甲氧基硅基）丙基丙烯酰胺）（PAPTS）壳和聚（聚乙二醇甲基丙烯酸酯）（POEGMA）冠组成。它们通过“从”策略制备，结合两种活/控制聚合技术：阴离子聚合用于主链和原子转移自由基聚合（ATRP）用于三嵌段共聚物侧链。单体 tBA、APTS 和 OEGMA 沿着主链从侧链 ATRP 引发基团连续生长，以空间方式将硅烷前体、三甲氧基硅基组织成管状。然后，合成的核壳冠状结构 CPB 用作单分子圆柱模板，通过 PAPTS 壳段的碱催化缩合原位制备水溶性有机硅杂化纳米管。形成的管状纳米结构通过透射电子显微镜（TEM）、低温 TEM 和原子力显微镜进行了表征。
