【摘要】 合成了乙烯基吡咯烷酮／磺酸甜菜碱两性单体共聚物水凝胶，探讨了时间、温度和外加盐浓度对凝胶溶胀行为的影响．与单一聚乙烯基毗咯烷酮凝胶不同，引入磺酸甜菜碱单体后得到的新型水凝胶同时具有温度和盐双重敏感特性，且其吸水性有明显改善．更多还原

【Abstract】 Poly (N-vinyl-2-pyrrolidone-co-sulfobetaine) hydrogel and poly (N-vinyl-2-pyrrolidone) hydrogel were prepared by free radical polymerization in the presence of N, N’-methylene-bisacrylamide. The influence of external stimuli such as temperature, ionic strength and time on the equilibrium swelling behavior of the gels were investigat- ed. Unlike individual PVP gel, the copolymer gel was characteristic of higher swelling ratio, both thermo - and salt -responsive behavior.更多还原