| 초록 |
Three years ago, we experienced major black out inthe summer. The accident was occurred because of excessive use of electricenergy. After the accident, people tried to apply IR-cut film, solar cell orIR-reflective paint on the building surfaces to save the summer consumption ofthe electricity. For these reasons, we tried to evaporating structures forcooling materials. Thermo-sensitive polymer, Poly(N-isopropylacrylamide)(PNIPAM), which emitting their stored water whentemperature was higher than low critical solution temperature(LCST), couldeffectively cool buildings compared to other materials. Into the responsivehydrogels, we applied coating layers controlling water evaporation. Our coatinglayer/PNIPAM structures showed suppressed evaporation at a low temperature. Butat a high temperature, the evaporation rate was similar to non-covered PNIPAMhydrogels. Also, we confirmed a cooling effect of 20degree℃ temperature reduction at a 60 ℃ condition. This evaporative material could work for thermo-sensitivesmart cooling. It can be applied as a paint material for any parts in a widerange of applications, which needs effective cooling. |
