We prepared novel polymer hydrogel sheets composed of thermo-responsive pNIPAAm main chain and photo-resnposive side chains of spiropyran. The drastic photo-induced dehydration was observed in 0.5 mM HCl aq. at 28°C, and photo-induced micro-relief formation was demonstrated. As a result, it was observed that the 5 sec irradiation of blue light induced the color bleaching firstly, and the hydrogel started to shrink. The thickness of the hydrogel sheet decreased to the half of the original thickness in the following 8 min and then returned to the former state 2.5 hours later in the irradiated region, while no significant change was observed in the unirradiated region.
|Number of pages||2|
|Publication status||Published - Dec 1 2006|
|Event||55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan|
Duration: Sep 20 2006 → Sep 22 2006
|Other||55th Society of Polymer Science Japan Symposium on Macromolecules|
|Period||9/20/06 → 9/22/06|
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