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Materials Research Innovations Volume 26, 2022 - Issue 1
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Research Article

Solvent Effect on Photo / Thermo Responsive behaviour and Application of Poly(N-isopropylacrylamide) End-capped with 4-Propoxyazobenzene in Aqueous Media

Xiaoqiang Xuea Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China;b Materials Research Institute and Department of Ecosystem Science and Management, Materials Research Laboratory, The Pennsylvania State University, University Park, PA, United States;c Huaide College, Changzhou University, Jingjiang, China;d Industrial College of Carbon Fiber and New Materials, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, Jiangsu, People’s Republic of China;e State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Soochow University, Suzhou, China
,
kang Lianga Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China
,
Tao Jianga Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China
,
Binzhe Lina Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China
,
Wenyan Huanga Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China
,
Hongjun Yanga Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China
,
Li Jianga Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China
,
Qiming Jianga Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China
,
Bibiao Jianga Jiangsu Key Laboratory of Material Surface Technology, School of Material Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, People’s Republic of China;c Huaide College, Changzhou University, Jingjiang, China;d Industrial College of Carbon Fiber and New Materials, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, Jiangsu, People’s Republic of ChinaCorrespondence[email protected]
&
Sridhar Komarnenib Materials Research Institute and Department of Ecosystem Science and Management, Materials Research Laboratory, The Pennsylvania State University, University Park, PA, United StatesCorrespondence[email protected]
 show all
Pages 44-51 | Received 16 Aug 2021, Accepted 12 Oct 2021, Published online: 30 Oct 2021
 
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ABSTRACT

The photoisomerisation behaviour of Poly(N-isopropylacrylamide) end-capped with 4-propoxyazobenzene (PNIPAM-Azo-OC3H7) was studied in a conconsolvent mixture of water and dioxane. The trans-cis isomerisation rate of PNIPAM-Azo-OC3H7 was mildly affected by the solvent compositions. Interestingly, the addition of dioxane could not only change the lower critical solution temperature (LCST) of PNIPAM-Azo-OC3H7 aqueous solution but also accurately controlled the increase or decrease in the LCST during UV irradiation. The LCST change (ΔT) could be adjusted from −5.0°C to 10.0°C, which was affected by the cononsolvent type, the second solvent and polymer concentration. Transmission electron micrographs (TEMs) showed that the PNIPAM-Azo-OC3H7 solution could self-assemble into different nano-micelles in different amounts of miscible solvents. UV irradiation of PNIPAM-Azo-OC3H7 solution was found to induce different changes in particle shape and size, which in turn led to either decrease or increase in the LCST changes in this novel responsive system. Furthermore, Nile red was tested here as a fluorescence probe for photo-induced release from PNIPAM-Azo-OC3H7 micelles, and the results suggested that this polymer could be used as a hydrophobic chemotherapeutic drug carrier for controlled release.

Acknowledgments

Financial support for this work by the National Natural Science Foundation of China (No. 21104006), a project funded by the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Jiangsu Industry-University-Research Collaboration project (No. BY2020139), Changzhou Science and Technology project (Nos. CE20195031 and CJ20190058), China Postdoctoral Science Foundation Funded Project (No. 2016M601785) and Jiangsu Province Post Doctoral Fund are gratefully acknowledged.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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