| 초록 |
Hydrogels are three-dimensional network structures of hydrophilic polymers by physical and chemical cross-linking and can be expanded their volumes by absorption water. Some of them change their equilibrium swelling state in responds to external stimuli such as pH, light, temperature, and electric field. We have found that composite hydrogels consisting of photo-thermal conversion materials embedded within a thermally responsive polymer matrix provide an efficient means to trigger changes in volumetric swelling by visible light irradiation. Base on light-responsibility of hydrogels, we have successfully demonstrated light-induced local switching of dynamic chemical pattern, microfluidic valve, and smart window for energy saving. For more potential applications, light-responsive hydrogels are prepared with controlled size and shape and then modified for reaction with targeting materials which is selectively binded with specific receptor. |
