采用热化学聚合法制备了聚甲基丙烯酸N,N-二甲基氨基乙酯(PDMAEMA)水凝胶,并对其溶胀性能进行了研究.研究结果表明,PDMAEMA水凝胶具有温度敏感性,在去离子水中其ICST约为50℃;水凝胶的温度敏感性与介质的pH值有关,在碱性溶液中凝胶表现出典型的温度敏感性,而在酸性溶液中凝胶的溶胀率受温度的影响很小,没有温度敏感性.
Poly (N,N-dimethylaminoethyl methacrylate) (PDMAEMA) hydrogels are synthesized by thermo-polymerization and its swelling behavior is studied. It turns out that the hydrogels exhibite temperature sensitivity, the lower critical solution temperature(LCST) of PDMAEMA hydrogels is about 50℃ under deionized water. The experimental results also show that the pH values of solution have a great effect on the temperature sensitivity of the hydrogels. The hydrogels exhibite obvious temperature sensitivity in high pH values buffer solutions, but the temperature has a small influence on the hydrogels in low pH values buffer solutions.
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