摘要
两亲性嵌段共聚物在溶液中能够自组装形成各种胶束,具有十分重要的应用意义。其中,环状胶束是一类比较新异的胶束结构,潜在应用丰富,但目前尚难以控制其尺寸与均一性。我们利用聚二茂铁硅烷均聚物和嵌段聚合物在选择性溶剂中协同共组装~([1]),成功制备了尺寸高度单分散的环状胶束;通过调节均聚物与嵌段聚合物的比例,可以在30至90微米间有效地控制环状胶束的直径。在引入聚二茂铁硅烷的极不良溶剂(水)之后,可永久保留环状胶束的形貌,从而用于导向纳米粒子环状阵列的合成。
Amphiphilic block copolymers can self-assemble into a variety of micellar morphologies in solution, which is useful for a wide range of interesting applications. The toroid structure is the focus herein because of the challenges in size control despite the unique shape and vast potential applications. We report the formation of uniform toroidal micelles by the co-assembly of polyferrocenylsilane homopolymer and block copolymer in selective solvents, with diameter well tuned by the ratio of the two components. After permanently trapped by water, the toroidal micelles become more stable and can be used to template ring-like nanoparticle arrays.
引文
[1]Chen,L.;Jiang,T.;Lin,J.;Cai,C.Langmuir 2013,29:8417.