论文部分内容阅读
为了解决动态光散射纳米颗粒测量技术无法测量高浓度颗粒粒径的难题,提出了一种基于偏振门的动态光散射测量法。从动态光散射和Mie理论出发,理论分析了在高浓度溶液下多重散射效应对散射光偏振态和颗粒粒度测量结果的影响。根据散射光偏振特点,结合偏振门检测技术,改进了传统的动态光散射光学系统。实验研究了在低浓度和高浓度溶液时,不同偏振角度下的散射光强和粒度测量值,完善了散射光的偏振理论。采用90°偏振门检偏,通过各种浓度下的实验,证明了方法的可行性。该方法较之目前同类方法具有原理和结构简单,系统易于维护的特点。
In order to solve the problem that dynamic light scattering nanoparticle measurement technology can not measure the particle size of high concentration particles, a dynamic light scattering measurement method based on polarization gate is proposed. Based on the theory of dynamic light scattering and Mie theory, the influence of multiple scattering effects on the polarization state of the scattered light and particle size measurement under high concentration solution is theoretically analyzed. According to the polarization characteristics of scattered light and the detection technology of polarization gate, the traditional dynamic light scattering optical system is improved. In low and high concentration solutions, the scattering intensity and particle size measurements at different polarization angles were experimentally studied, and the polarization theory of scattered light was improved. Using 90 ° polarization door test bias, through experiments at various concentrations, proved the feasibility of the method. Compared with the current similar methods, the method has the advantages of simple principle and simple structure, and the system is easy to maintain.