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Hyperbranched Azopolymer with Quadruple Responsibility |
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| Authors: | Tian Chen Zhou Ke-Cong Lu Yu-Fei Li Jin-Jie Yao Yuan Tao Xin-Feng Zhuang Qi-Xin Xie Yu-Feng Lin Shao-Liang |
| Institution: | 1.Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China ;2.Department of Periodontology, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University, Shanghai, 200011, China ; |
| Abstract: | Simply constructing multiple responsive polymers with obvious shape and dimension variations on their assemblies upon different stimuli is still rarely reported.In this study,we report a hyperbranched polymer named HPAzoBAHB-star-PEG9 with quadruple-response to light,temperature,pH and oxidation stimuli.The polymer contains azobenzene chromophore,sulfide,amide and amine groups in its hydrophobic hyperbranched core,and the core is capped with hydrophilic polyethylene glycol(PEG9)arms.HPAzoBAHB-star-PEG9 could assemble into unusual leaf-like lamellar micelles at 25℃under the guidance of orderly arranged H-aggregate of azobenzene moieties.These leaf-like lamellar micelles can transform into vesicles upon UV irradiation and lower temperature,or convert to smaller spherical micelles in acidic or oxidative environments,respectively,with the destroy of ordered azobenzene arrangements.This quadruple-responsive hyperbranched polymer is suitable to construct multiple stimuli-responsive micro/nanostructures,or accurate delivery and release following subtle stimuli sequences. |
| Keywords: | Hyperbranched Azopolymer Multiple responsibility Self-assembly |
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