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以N -异丙基丙烯酰胺为单体制备了聚合物水凝胶。温度低于30℃时该体系清澈透明 ,透光率达90 %以上 ;30℃时体系开始出现浑浊现象 ;32℃时体系的透光率不足10 % ,是一种可以遮光的乳白色凝胶。水凝胶的这两种状态可以随外界温度的变化自动变化 ,而转变温度可通过改变聚合物组成来控制。将该水凝胶置于2层玻璃中间 ,可制备随外界温度变化而改变透光率的热敏性智能玻璃窗
Polymeric hydrogels were prepared using N - isopropylacrylamide as monomer. When the temperature is lower than 30 ℃, the system is clear and transparent with light transmittance of more than 90%. At 30 ℃, the system begins to appear turbidity. The light transmittance of the system is less than 10% at 32 ℃. The two states of hydrogel can change automatically with the change of external temperature, and the transition temperature can be controlled by changing the composition of polymer. The hydrogel placed in the middle of 2 layers of glass can be prepared with changes in temperature changes outside the light transmittance of the heat-sensitive smart glass window