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