Citation: Chun-mei Jian, Bo-wen Liu, Xi Chen, Si-tong Zhou, Tommy Fang, Jin-ying Yuan. Construction of Photoresponsive Supramolecular Micelles Based on Ethyl Cellulose Graft Copolymer[J]. Chinese Journal of Polymer Science, ;2014, 32(6): 690-702. doi: 10.1007/s10118-014-1450-9 shu

Construction of Photoresponsive Supramolecular Micelles Based on Ethyl Cellulose Graft Copolymer

Corresponding author: Jin-ying Yuan,
Received Date: 22 January 2014
Revised Date: 4 March 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 21174076 and 21374053), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20120002110015).

In this work, a UV-Visible light controlled supramolecular system based on ethyl cellulose (EC) was constructed, combining the host-guest interaction of -cyclodextrin (-CD) group and trans-isomer of azobenzene (tAzo) group. To link -CD to the hydrophobic section, renewable EC was used as macroinitiator to initiate the polymerization of e-caprolactone (e-CL) to form biocompatible and biodegradable comb copolymer EC-g-PCL, and -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 -CD and tAzo groups, the obtained EC-g-PCL--CD/PEG-tAzo supramolecular system self-assembled in water with hydrophobic EC-g-PCL--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-Vis ible light stimuli-responsiveness of the micelles.
- Ethyl cellulose,
- Supramolecular system,
- Self-assembly,
- Photoresponse
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沈阳化工大学材料科学与工程学院沈阳 110142