Characterization of new thermo-responsive hydrogels for optical sensing applications

Juan Carlos Rueda; Kevin Contreras; Rafael Coello; Mauro Lomer; Hartmut Komber; Stefan Zschoche; Brigitte Voit

doi:10.1117/12.720426

7 May 2007 Characterization of new thermo-responsive hydrogels for optical sensing applications

Juan Carlos Rueda, Kevin Contreras, Rafael Coello, Mauro Lomer, Hartmut Komber, Stefan Zschoche, Brigitte Voit

Proceedings Volume 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III; 65720T (2007) https://doi.org/10.1117/12.720426
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

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.

Citation Download Citation

Juan Carlos Rueda, Kevin Contreras, Rafael Coello, Mauro Lomer, Hartmut Komber, Stefan Zschoche, and Brigitte Voit "Characterization of new thermo-responsive hydrogels for optical sensing applications", Proc. SPIE 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III, 65720T (7 May 2007); https://doi.org/10.1117/12.720426

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