@conference{10902/2578, year = {2007}, month = {5}, url = {http://hdl.handle.net/10902/2578}, 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.}, publisher = {SPIE Society of Photo-Optical Instrumentation Engineers}, publisher = {Proceedings of SPIE, 2007, vol. 6572, 65720T}, publisher = {Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III, Orlando (FL), 2007}, title = {Characterization of new thermo-responsive hydrogels for optical sensing applications}, author = {Rueda Sánchez, Juan Carlos and Contreras Villalobos, Kevin and Coello Paria, Rafael and Lomer Barboza, Mauro Matías and Komber, Hartmut and Zschoche, Stefan and Voit, Brigitte}, }