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Proceedings Paper

Characterization of new thermo-responsive hydrogels for optical sensing applications
Author(s): Juan Carlos Rueda; Kevin Contreras; Rafael Coello; Mauro Lomer; Hartmut Komber; Stefan Zschoche; Brigitte Voit
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Paper Abstract

We report the use of new hydrogels based on poly-N-isopropylacrilamide and MeOXA in order to measure temperature using optical transmittance. We have obtained thermo-responsive hydrogels based on the radical copolymerization of N-isopropylacrylamide (NIPAAm) and bis-macromonomers of 2-methyl-2-oxazoline (MeOXA). The hydrogels show conformational transitions at defined temperatures, which are a function of the molar ratio NIPAAm / MeOXA inside of the hydrogel. The temperatures of transition have been determined by means of 1H NMR spectroscopy and by turbidity measurements using an optical setup with optical fibers and a diode laser. We show the first experimental results and we discuss some future applications such as an optical switch or a device for optical sensing.

Paper Details

Date Published: 7 May 2007
PDF: 7 pages
Proc. SPIE 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III, 65720T (7 May 2007); doi: 10.1117/12.720426
Show Author Affiliations
Juan Carlos Rueda, Pontificia Univ. Católica del Perú (Peru)
Kevin Contreras, Pontificia Univ. Católica del Perú (Peru)
Rafael Coello, Pontificia Univ. Católica del Perú (Peru)
Mauro Lomer, Univ. of Cantabria (Spain)
Hartmut Komber, Leibniz Institute of Polymer Research (Germany)
Stefan Zschoche, Leibniz Institute of Polymer Research (Germany)
Brigitte Voit, Leibniz Institute of Polymer Research (Germany)


Published in SPIE Proceedings Vol. 6572:
Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III
Michael J. Hayduk; Andrew R. Pirich; Peter J. Delfyett; Eric J. Donkor; John P. Barrios; Rebecca J. Bussjager; Michael L. Fanto; Robert L. Kaminski; Guifang Li; Hooman Mohseni; Edward W. Taylor, Editor(s)

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