Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan.
Langmuir. 2013 Feb 19;29(7):2427-33. doi: 10.1021/la3047752. Epub 2013 Feb 5.
The influence of temperature on the electrophoretic behavior of a charge-regulated zwitterionic particle is investigated by considering a spherical SiO(2) particle in a relatively dilute aqueous NaCl solution of concentration C(NaCl) with its pH adjusted by NaOH and HCl as an example. A complete mobility-pH-temperature plot and a mobility-C(NaCl)-temperature plot are prepared for pH, C(NaCl), and temperature ranging from 3 to 9.5, 10(-4) to 10(-2) M, and 293 to 308 K, respectively, for the first time, and empirical correlation relationships are developed. These provide necessary information for both interpreting experimental data and designing electrophoresis devices, where the variation in the temperature can be a factor. In general, the absolute value of the particle mobility increases with T, and that value has a local maximum as pH varies.
本文以 pH 值由 NaOH 和 HCl 调节、浓度为 C(NaCl)的相对稀的 NaCl 水溶液中的 SiO2 球形粒子为例，考察了温度对荷电两性离子粒子电泳行为的影响。首次绘制了完整的迁移率-pH-温度图和迁移率-C(NaCl)-温度图，分别涵盖了 pH 值、C(NaCl)值和温度的范围为 3 至 9.5、10(-4)至 10(-2) M 和 293 至 308 K。并开发了经验相关关系。这些为解释实验数据和设计电泳设备提供了必要的信息，其中温度的变化可能是一个因素。一般来说，粒子迁移率的绝对值随 T 的增加而增加，并且当 pH 变化时，该值具有局部最大值。
