https://scholars.lib.ntu.edu.tw/handle/123456789/576323
標題: | Diffusiophoresis in suspensions of charged soft particles | 作者: | Lin W.C Keh H.J. HUAN-JANG KEH |
公開日期: | 2020 | 卷: | 4 | 期: | 3 | 來源出版物: | Colloids and Interfaces | 摘要: | The diffusiophoresis in a suspension of charged soft particles in electrolyte solution is analyzed. Each soft particle is composed of a hard core of radius r0 and surface charge density σ and an adsorbed fluid-penetrable porous shell of thickness a ? r0 and fixed charge density Q. The effect of particle interactions is considered by using a unit cell model. The ionic concentration, electric potential, and fluid velocity distributions in a unit cell are solved as power expansions in σ and Q, and an explicit formula for the diffusiophoretic velocity of the soft particle is derived from a balance between the hydrodynamic and electrostatic forces exerted on it. This formula is correct to the second orders of σ and Q and valid for arbitrary values of κa, λa, r0/a, and the particle volume fraction of the suspension, where κ is the Debye screening parameter and λ is the reciprocal of a length featuring the flow penetration into the porous shell. The effects of the physical characteristics and particle interactions on the diffusiophoresis (including electrophoresis and chemiphoresis) in a suspension of charged soft particles, which become those of hard particles and porous particles in the limits r0 = a and r0 = 0, respectively, are significant and complicated. ? 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099977174&doi=10.3390%2fcolloids4030030&partnerID=40&md5=a219be0c765ab42d9dee9edf556e7282 https://scholars.lib.ntu.edu.tw/handle/123456789/576323 |
ISSN: | 25045377 | DOI: | 10.3390/colloids4030030 |
顯示於: | 化學工程學系 |
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