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[Polymer] Synthesis and thermally-triggered self-assembly behaviors of a dumbbell-shaped polymer carrying β-cyclodextrin at branch points
作者:Yang Bai, Xiao-dong Fan*,Wei Tian*, Hao Yao, Long-hai Zhuo, Hai-tao Zhang,Wei-wei Fan, Zhen Yang, Wa
關鍵字:Dumbbell-shaped polymer,β-cyclodextrin,self-assembly behaviors
論文來源:期刊
具體來源:Polymer 54 (2013): 3566-3573
發表時間:2013年
We report the design and synthesis of a thermally-responsive dumbbell-shaped polymer based on one b-cyclodextrin (β-CD)-terminated polyethylene glycol (PEG) segment and several poly(N-isopropylacrylamide) (PNIPAM) segments through combining click reaction with atom transfer radical polymerization. Thermally-triggered self-assembly and molecular inclusion behaviors of the polymer were investigated by UVevis spectroscopy, dynamic light scattering (DLS), 1H NMR in D2O, fluorescence spectroscopy and transmission electron microscopy. These results indicated that the

polymer presents both thermal sensitivity and molecular inclusion properties due to the existence of PNIPAM segments and β-CD units. Above the lower critical solution temperature (LCST) of PNIPAM segment, the polymer can self-assemble into nano-sized assemblies, where PNIPAM segments serve as the core and PEG segments are organized as the corona. By using 1-adamantane acid sodium as guest molecule, the polymer shows size-adjusted aggregation behaviors based on the inclusion interactions between β-CD and guest molecule.

全文鏈接:http://m.jrdgc.com/UploadFile/research/201310301506437401.pdf

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