Zeta电位
电泳
电泳光散射
稀释
色散(光学)
分析化学(期刊)
粒子(生态学)
粒径
光散射
动态光散射
散射
化学
胶体
材料科学
色谱法
纳米技术
光学
热力学
物理
纳米颗粒
物理化学
海洋学
地质学
作者
Michael Kaszuba,Jason Corbett,Fraser Mcneil Watson,Andrew Jones
标识
DOI:10.1098/rsta.2010.0175
摘要
Zeta potential is the key parameter that controls electrostatic interactions in particle dispersions. Laser Doppler electrophoresis is an accepted method for the measurement of particle electrophoretic mobility and hence zeta potential of dispersions of colloidal size materials. Traditionally, samples measured by this technique have to be optically transparent. Therefore, depending upon the size and optical properties of the particles, many samples will be too concentrated and will require dilution. The ability to measure samples at or close to their neat concentration would be desirable as it would minimize any changes in the zeta potential of the sample owing to dilution. However, the ability to measure turbid samples using light-scattering techniques presents a number of challenges. This paper discusses electrophoretic mobility measurements made on turbid samples at high concentration using a novel cell with reduced path length. Results are presented on two different sample types, titanium dioxide and a polyurethane dispersion, as a function of sample concentration. For both of the sample types studied, the electrophoretic mobility results show a gradual decrease as the sample concentration increases and the possible reasons for these observations are discussed. Further, a comparison of the data against theoretical models is presented and discussed. Conclusions and recommendations are made from the zeta potential values obtained at high concentrations.
科研通智能强力驱动
Strongly Powered by AbleSci AI