Directional motion of charged particles near filter membrane br

doi:10.7498/aps.72.20220567

	Directional motion of charged particles near filter membrane br
	Zhou HW(周宏伟); 欧阳文泽 ; Xu SH(徐升华)
刊名	ACTA PHYSICA SINICA ; 3
	2023-02
卷号	72 页码:38201
关键词	charged particles filter membrane diffusiophoresis directional movement
ISSN号	1000-3290
DOI	10.7498/aps.72.20220567
英文摘要	Membrane has many applications in the fields of filtration and separation, but due to the attraction orrepulsion exerted by the membrane, the particles will experience a directional motion. As a result, two totallyopposite effects, i.e. particle enrichment and exclusion zone, take place in the vicinity of the membrane, and theunderlying reason is still not clear. In this work, colloidal particles with negative surface charge are used as amodel substance, with the advantages of monitoring the particle concentration in a real time and in situ way, toinvestigate the influence of cellulose membrane on the movement of particles. The experimental results showthat the particles are enriched in the vicinity of the membrane. The diffusiophoresis effect originating from tinynumber of ions released by the film is the main reason of the directional movement of the charged particles.Based on the two mechanisms of diffusiophoresis and diffusion, we construct a model and make relevantnumerical calculation, and the numerical results are qualitatively consistent with the experimental results.Moreover, in addition to the longitudinal motion of the particles towards the filter membrane, diffusio-osmoticflow and particles lateral diffusion also result in the migration of particles towards the container wall, andfurther increasing the particle number near the wall.
分类号	Q4
WOS研究方向	WOS:000944459300002
语种	英语
资助机构	National Natural Science Foundation of China [22172180, 11672295]
其他责任者	Xu, SH
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92252]
专题	力学研究所_国家微重力实验室
作者单位	1.(Xu Sheng-Hua) Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 2.(Zhou Hong-Wei, Ouyang Wen-Ze, Xu Sheng-Hua) Chinese Acad Sci Inst Mech Key Lab Micrograv Beijing 100190 Peoples R China
推荐引用方式 GB/T 7714	Zhou HW,欧阳文泽,Xu SH. Directional motion of charged particles near filter membrane br[J]. ACTA PHYSICA SINICA, 3,2023,72:38201.
APA	周宏伟,欧阳文泽,&徐升华.(2023).Directional motion of charged particles near filter membrane br.ACTA PHYSICA SINICA,72,38201.
MLA	周宏伟,et al."Directional motion of charged particles near filter membrane br".ACTA PHYSICA SINICA 72(2023):38201.