| 초록 |
Hydrogels based on physical junctions have attracted immense interests due to their dynamic properties. In this research, we synthesized the copolymer hydrogel containing large amount of ureidopyrimidinone (UPy) group. The small-angle X-ray scattering reveals the presense of water-impermeable domains in the hydrogel and the confinement of the water molecules between them. Due to the confinement effect, water in the hydrogel becomes hardly crystallized during the freezing. Furthermore, the rheology revealed that the dynamics of UPy is fast and enables the hydrogel to be self-healable at the ambient temperature. On the other hand, the dynamics of UPy became slow at the low temperature, which leads to the confinement formation based on the stacking of UPy dimers. The controlled dynamics of UPy domain induces both of the antifreeze and self-healable properties, and we hope that this finding will aid in designing of functional materials. |
