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課題組關于環糊精在調節響應性聚合物可逆自組裝行為的機理研究發表在RSC Adv.上

Cyclodextrin-Tunable Reversible Self-Assembly of Thermoresponsive Y-shaped Polymer

 

HaoYaoa, Wei Tiana*, YuezhouLiua, Yang Baib,DizhengLiua, TingtingLiua,Miao Qia, Min Wanga, YuyangLiua



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.


 


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


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