High Solar Modulation and Fast-Response Thermoresponsive Poly( N -isopropylacrylamide- co -2-hydroxyethyl methacrylate) Hydrogel for Energy-Efficient Smart Windows

Pa, approximately a 1.75-fold improvement. After 100 heating-cooling cycles, the composite hydrogels maintained stable optical performance. These enhancements clearly demonstrate the great potential of this hydrogel for applications in smart window technologies.