Textile Coloration and Finishing (한국염색가공학회지)

The Korean Society of Dyers and Finishers (한국염색가공학회)
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Thermo- and Acid/base-induced Spectral Switching of a Poly(N-isopropylacrylamide) Copolymer Containing Benzopyran-based D-π-A type Dye Units

  • Lee, Eun-Mi (Department of Advanced Organic Materials Science and Engineering, Kyungpook National University) ;
  • Gwon, Seon-Yeong (Department of Advanced Organic Materials Science and Engineering, Kyungpook National University) ;
  • Ji, Byung-Chul (Department of Advanced Organic Materials Science and Engineering, Kyungpook National University) ;
  • Kim, Sung-Hoon (Department of Advanced Organic Materials Science and Engineering, Kyungpook National University)
  • Received : 2010.08.23
  • Accepted : 2010.09.13
  • Published : 2010.09.27
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Abstract

A thermoresponsive poly(NIPAM-co-dye) labeled with benzopyran-based D-$\pi$-A type dye was prepared by typical radical copolymerization. It can be also constructed a acid/base-induced molecular switch by modulation of intramolecular charge transfer with protonation/deprotonation. The lower critical solution temperature behavior was investigated by means of UV-vis spectroscopy which allows the measurement of the phase transition from $25^{\circ}C$ to $45^{\circ}C$ in aqueous DMSO solution. The morphology of the internal microstructure of the poly(NIPAM-co-dye) hydrogel was observed by scanning electron microscopy. The reversible switch could be obtained by thermal and acid/base stimuli.

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References

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