非共价键胶束——聚合物自组装的新途径  

Non-Covalent Bond Micellization—A New Approach to Macromolecular Self-Assembly

作　　者：朱蕙[1] 袁晓凤[1] 赵汉英[1] 刘世勇[1] 江明[1] 

机构地区：[1]复旦大学高分子科学系和聚合物分子工程教育部重点实验室,上海200433

出　　处：《应用化学》2001年第5期336-341,共6页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金重大项目 !(2 9992 5 90 )

摘　　要：自组装纳米结构是化学科学中的前沿课题 .嵌段聚合物在选择性溶剂中可自组装形成不同形态的胶束 .我们的研究表明 ,两组分间存在的特殊相互作用可导致高分子间的络合 ,但络合通常不能形成规则的结构 .我们提出形成聚合物胶束新途径的原理是 ,在共混物的选择性溶剂中 ,若两组分间存在特殊相互作用 ,不溶组分会发生聚集 ,但并不沉淀出来 ,因为可溶组分的稳定作用而形成了纳米尺寸的类似于胶束结构的自组装聚集体 .这种胶束不同于传统意义上由嵌段共聚物形成的胶束 ,后者核壳之间由共价键相连 .Self-assembled nanostructure” is a prevalent phrase in chemistry in recent years. Block copolymers in a selective solvent can be self-assembled to micelles. Polymer micelles may eventually prove to have important technological applications. We have studied interpolymer complexation through specific interactions for years. However, the complexation usually does not lead to well-defined structures . Our new approach is: when polymer A is dissolved in a good solvent and added to a solution containing polymer B in a nonsolvent for A, the precipitation of A can be prevented due to the specific interaction between A and B, and instead, micelles with A core and B corona are formed. Similarly , it is also possible to prepare “graft copolymer” between A and B in a common solvent via hydrogen bonding first, then mix it with a selective solvent to form A-B micelles. This kind of micelle differs from the conventional block copolymer micelles, in which the corona and the core are chemically bonded. This paper summarizes our major recent results on this new approach to several different kinds of systems, either in organic or in aqueous media.

关 键 词：纳米材料 非共价键 胶束 高分子自组装 氢链 分子间相互作用 嵌段 聚合物 选择性溶剂 

分 类 号：O641.3[理学—物理化学] TB383[理学—化学]