| 초록 |
Soft actuators are actively being researched to develop soft robots responding to various stimuli. Although photo-responsive material can adjust deformation by remote control, there has been difficulty in manufacturing to have different driving properties within a single material. We developed a melanin-driven light-responsive hydrogel actuator composed of agar/alginate double-network (DN) hydrogel and N-isopropylacrylamide. For melanin nanoparticles, dopamine precursor was introduced to the pristine hydrogel and in situ oxidation polymerization was proceeded in polymer networks. It was possible to form different melanin concentrations depending on the time and number of polymerization. As hydrogel containing melanin were irradiated, heat was generated by photothermal effect and caused actuation, which leads to shrinkage resulting in shape morphing. Finally, we observed different shape morphing behaviors with different melanin concentration under the same light irradiation condition. |
