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．我们近期通过这一新途径报道了对多种聚合物体系在有机及水介质中实现胶束化的研究成果．
“Self-assembled nanostructure” is a prevalent phrase in chemistry in recent years. Blockcopolymers in a selective solvent can be self-assembled to micelles. Polymer micelles may eventuallyprove to have important technological applications. We have studied interpolymer complexationthrough 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 toa solution containing polymer B in a nonsolvent for A, the precipitation of A can be prevented due tothe 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 viahydrogen bonding first, then mix it with a selective solvent to form A-B micelles. This kind of micellediffers from the conventional block copolymer micelles, in which the corona and the core arechemically bonded. This paper summarizes our major recent results on this new approach to severaldifferent kinds of systems, either in organic or in aqueous media.
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