LI Jiangtao^1,2,SUN Jian³,LI Xiaoguang³,LIU Yueqiang³, ZHENG Hao³,ZHANG Xianglei¹,NING Hui³,LI Zirui²

(1.College of Mechanical and Electrical Engineering,Wenzhou University,Wenzhou 325035,China;2.School of Mechanical Engineering, Hebei University of Technology,Tianjin 300401,China;3.Dandong Better size Instruments Co.Ltd.,Dandong 118009,China)

Abstract:In order to study the problem of large standard deviation of Zeta potential test results due to the unreasonable design of the capillary electrode structure in the process of testing Zeta potential by electrophoretic light scattering technology,the electric field distribution of the capillary electrode was simulated by finite element software.Bound optimization by quadratic approximation (BOBYQA) algorithm was used to optimize the capillary electrode structure.The results show that BOBYQA algorithm can effectively improve the rationality of the design of the capillary electrode,and reduce the influence of the detection position on Zeta potential results during the detection process.The internal structure of the capillary with the proportional factor of the inner and outer diameters corresponding to the optimal field intensity distribution is obtained.The experimental results show that Zeta potential of the standard sample in the optimized capillary electrode is less affected by the detection position and is within the standard range.

Keywords:capillary electrode；uneven electric field；bound optimization by quadratic approximation algorithm

中图分类号：TH6                              文献标志码：A

文章编号：1008-5548(2022)05-0017-07

DOI:10.13732/j.issn.1008-5548.2022.05.003

收稿日期： 2022-02-22， 修回日期：2022-04-18，在线出版时间：2022-07-12 14:46。

基金项目：国家自然科学基金项目，编号：12072100。

第一作者简介：李江涛(1996—)，男，硕士研究生，研究方向为纳米Zeta电位仪多物理场仿真及优化。E-mail：1738144236@qq.com。

通信作者简介：宁辉 (1978—)，男，博士，研究方向为胶体物理和分析仪器研制。E-mail：hui.ning@bettersize.com。