论文标题
温度和pH敏感胶体微凝胶的动态光散射研究
Dynamic Light Scattering Study of Temperature and pH Sensitive Colloidal Microgels
论文作者
论文摘要
通过动态光散射研究了由聚（N-异丙丙烯酰胺）（PNIPAM）（PNIPAM）（PNIPAM）（PNIPAM）（PNIPAM）和聚（PAAC）组成的微凝胶颗粒（IPN）组成的微凝胶颗粒。对弛豫时间的温度，浓度和pH依赖性的研究突显了与肿胀的体积相变相对应的热可爱的过渡的存在。 PAAC的存在引入了由于PNIPAM引起的温度敏感性的额外pH值，并在酸和中性pH值下导致过渡过程的有趣差异。
Microgel particles composed of Interpenetrated Polymer Networks (IPN) of poly(N-isopropylacrylamide) (PNIPAM) and poly(acrylic acid) (PAAc) dispersed in water have been investigated through dynamic light scattering. The study of the temperature, concentration and pH dependence of the relaxation time has highlighted the existence of a thermoreversible transition corresponding to the swollen-shrunken volume phase transition. The presence of PAAc introduces an additional pH-sensitivity with respect to the temperature-sensitivity due to PNIPAM and leads to interesting differences in the transition process at acid and neutral pH.
