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Issue 14, 2014
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Ultraviolet light-breakable and tunable thermoresponsive amphiphilic block copolymer: from self-assembly, disassembly to re-self-assembly

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Abstract

Novel ultraviolet (UV) light-breakable and tunable thermoresponsive amphiphilic block copolymers were synthesized by atom transfer radical polymerization (ATRP). These amphiphilic copolymers can self-assemble into micelles in water. The lower critical solution temperature (LCST) and size of the micelles were adjusted by altering the ratio of 2-(2-methoxyethoxy)ethyl methacrylate (MEO2MA) and oligo(ethylene glycol) methacrylate (OEGMA). Upon UV light irradiation, 2-nitrobenzyl moieties were detached from polymer chains and the micelles were dissociated. When the solutions were heated above LCST, the micelles can be re-self-assembled. Investigation revealed that the Nile red molecules which were encapsulated in micelles can be controllably released through changing temperature and undergoing UV light irradiation of micelle solutions.

Graphical abstract: Ultraviolet light-breakable and tunable thermoresponsive amphiphilic block copolymer: from self-assembly, disassembly to re-self-assembly

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Supplementary files

Article information


Submitted
05 Dec 2013
Accepted
18 Mar 2014
First published
18 Mar 2014

Polym. Chem., 2014,5, 4259-4267
Article type
Paper

Ultraviolet light-breakable and tunable thermoresponsive amphiphilic block copolymer: from self-assembly, disassembly to re-self-assembly

W. Yuan and W. Guo, Polym. Chem., 2014, 5, 4259
DOI: 10.1039/C3PY01681A

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