课题组关于环糊精在调节响应性聚合物可逆自组装行为的机理研究发表在RSC Adv.上-Wei Tian

Tuning the reversible self-assembly process of stimuli-responsive topological polymers in solution has theoretical and practical significance. In this study, wecovalently incorporatedβ-cyclodextrin (β-CD) onto the thermoresponsive Y-shaped polymer toinvestigate the influenceof β-CD on the morphology,size and reversibility of self-assemblies. Transmission electron microscopy,atomic force microscopy,anddynamiclight scattering results indicated that the morphology and sizeof polymer self-assemblies present a good reversibilityduring the whole heating-cooling process.The self-assembly morphology gradually changed from dot-like micelles to noticeable core-corona-structured micelles, and finally back to dot-like micelles again. Meantime, the size of self-assemblies first increased from several tens of nanometers to hundreds of nanometers, and then decreased to get close to the initial value. The attachedβ-CD units have a pronouncedregulation effect on thereversible self-assembly process. Thecorresponding mechanismis attributed to theabilities ofβ-CD itself toconduct inclusioncomplexation, induce intermolecular hydrogen bonding interaction and present steric hinerance. Our study has expanded a new idea to reversiblytune the morphology and size ofstimulus-responsive topological polymerself-assemblies.

全文链接：http://pubs.rsc.org/en/content/articlelanding/2014/RA/C5RA03064A#!divAbstract