“…Thermochromic anti-freezing hydrogels are required for smart windows in cold regions. 93,139 Recently, several strategies based on hydrogen bonding competition between polymer chains and water have been proposed to improve the anti-freezing ability of thermochromic hydrogels, including the introduction of organic solvents 118,125 and modulation of polymer structures. 95 Wang et al prepared an anti-freezing smart window with a T lum of 89.3% and DT sol of 80.7% by using thermochromic poly(N-isopropylacrylamide)-poly(N,N-dimethylacrylamide)/ ethylene glycol hydrogel (PNIPAM-PDMAA/EG) that is resistant to low temperatures.…”