摘要
以氯化钠水溶液作为反应介质,成功制备了温度与pH快速响应性聚(N-异丙基丙烯酰胺-co-丙烯酸)[P(NIPAM-co-AAc)]水凝胶,研究了氯化钠水溶液的浓度对凝胶性能的影响。通过红外光谱(FT-IR)、扫描电镜(SEM)、测溶胀比对凝胶性能进行了表征。结果表明:凝胶具有相同的化学组成与结构,但具有不同的微观形态;随着反应介质中氯化钠浓度的增加,凝胶在20℃蒸馏水中的平衡溶胀比增大,并表现出较强的温度与pH敏感性以及较快的去溶胀速率。
Fast responsive thermo and pH sensitive poly (N-isopropylacrylamide-co-acrylic acid) [P(NIPAM-co-AAc)] hydrogels were successfully prepared in aqueous NaCl solutions. The influence of NaCl concentration on the characteristics of the resulting hydrogels was investigated with Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy(SEM) and measuring swelling ratio. The results show that the chemical compositions and structures of different hydrogels are similar, but their micro morphologies are different. With the NaCl concentration increasing in the polymerization medium, the equilibrium swelling ratio of the hydrogels in 20 ℃ distilled water increases, the hydrogels exhibit stronger sensitivity to pH and temperature, and show much faster deswelling response rates.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2009年第4期395-400,共6页
Journal of Functional Polymers