Chinese Journal of Polymer Science

, Volume 32, Issue 6, pp 690–702 | Cite as

Construction of photoresponsive supramolecular micelles based on ethyl cellulose graft copolymer

  • Chun-mei Jian
  • Bo-wen Liu
  • Xi Chen
  • Si-tong Zhou
  • Tommy Fang
  • Jin-ying Yuan (袁金颖)
Papers

Abstract

In this work, a UV-Visible light controlled supramolecular system based on ethyl cellulose (EC) was constructed, combining the host-guest interaction of β-cyclodextrin (β-CD) group and trans-isomer of azobenzene (tAzo) group. To link β-CD to the hydrophobic section, renewable EC was used as macroinitiator to initiate the polymerization of ɛ-caprolactone (ɛ-CL) to form biocompatible and biodegradable comb copolymer EC-g-PCL, and β-CD was attached to the end of PCL side chain via click reaction. Meanwhile, hydrophilic PEG-tAzo was obtained by N,N′-dicyclohexylcarbodiimide (DCC) coupling. Then, the structures of the products were characterized by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). Subsequently, with the formation of inclusion complexes by β-CD and tAzo groups, the obtained EC-g-PCL-β-CD/PEG-tAzo supramolecular system self-assembled in water with hydrophobic EC-g-PCL-β-CD as core and hydrophilic PEG-tAzo as shell. Furthermore, dynamic light scattering (DLS) and transmission electron microscopy (TEM) were utilized to investigate the particle size and size distribution, while NMR and UV-Vis spectra were applied to explore the UV-Visible light stimuli-responsiveness of the micelles.

Keywords

Ethyl cellulose Supramolecular system Self-assembly Photoresponse 

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Chun-mei Jian
    • 1
  • Bo-wen Liu
    • 1
  • Xi Chen
    • 1
  • Si-tong Zhou
    • 1
  • Tommy Fang
    • 1
  • Jin-ying Yuan (袁金颖)
    • 1
  1. 1.Key Lab of Organic Optoelectronic & Molecular Engineering of Ministry of Education, Department of ChemistryTsinghua UniversityBeijingChina

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