Experimental Investigation of Eletrokinetic Stabilization of Gravitational Drainage of Ionic Surfactants Films

Soumyadip Sett; Rakesh P. Sahu; Suman Sinha-Ray; Alexander Yarin

doi:10.1016/j.electacta.2015.11.076

Experimental Investigation of Eletrokinetic Stabilization of Gravitational Drainage of Ionic Surfactants Films

Soumyadip Sett, Rakesh P. Sahu, Suman Sinha-Ray, Alexander Yarin

College of Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Gravitational drainage of vertical films of ionic surfactants supported on a frame with the upper and lower parts being electrodes is studied experimentally. The electric field introduces three additional physical phenomena: (i) the surface charge redistribution, which eventually changes surface elasticity, (ii) the electroosmotic flow in the diffuse layer, and (iii) pressure build-up near the electrode toward which the electroosmotic flow is directed. It is shown that stabilization of the films is possible either due to the traction imposed by the electroosmotic flow directed upward (against gravity), or due to the pressure build-up near the lower end of the frame, in cases where the electroosmotic flow is directed downward (in the gravity direction) and enters a dead end at the lower electrode.

Original language	English
Pages (from-to)	693-703
Number of pages	11
Journal	Electrochimica Acta
Volume	187
DOIs	https://doi.org/10.1016/j.electacta.2015.11.076
Publication status	Published - 2016 Jan 1

Keywords

Electrokinetic stabilization
Electroosmosis
Foams
Gravitational drainage
Surfactant films

ASJC Scopus subject areas

Electrochemistry
Chemical Engineering(all)

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title = "Experimental Investigation of Eletrokinetic Stabilization of Gravitational Drainage of Ionic Surfactants Films",

abstract = "Gravitational drainage of vertical films of ionic surfactants supported on a frame with the upper and lower parts being electrodes is studied experimentally. The electric field introduces three additional physical phenomena: (i) the surface charge redistribution, which eventually changes surface elasticity, (ii) the electroosmotic flow in the diffuse layer, and (iii) pressure build-up near the electrode toward which the electroosmotic flow is directed. It is shown that stabilization of the films is possible either due to the traction imposed by the electroosmotic flow directed upward (against gravity), or due to the pressure build-up near the lower end of the frame, in cases where the electroosmotic flow is directed downward (in the gravity direction) and enters a dead end at the lower electrode.",

keywords = "Electrokinetic stabilization, Electroosmosis, Foams, Gravitational drainage, Surfactant films",

author = "Soumyadip Sett and Sahu, {Rakesh P.} and Suman Sinha-Ray and Alexander Yarin",

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T1 - Experimental Investigation of Eletrokinetic Stabilization of Gravitational Drainage of Ionic Surfactants Films

AU - Sett, Soumyadip

AU - Sahu, Rakesh P.

AU - Sinha-Ray, Suman

AU - Yarin, Alexander

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Gravitational drainage of vertical films of ionic surfactants supported on a frame with the upper and lower parts being electrodes is studied experimentally. The electric field introduces three additional physical phenomena: (i) the surface charge redistribution, which eventually changes surface elasticity, (ii) the electroosmotic flow in the diffuse layer, and (iii) pressure build-up near the electrode toward which the electroosmotic flow is directed. It is shown that stabilization of the films is possible either due to the traction imposed by the electroosmotic flow directed upward (against gravity), or due to the pressure build-up near the lower end of the frame, in cases where the electroosmotic flow is directed downward (in the gravity direction) and enters a dead end at the lower electrode.

AB - Gravitational drainage of vertical films of ionic surfactants supported on a frame with the upper and lower parts being electrodes is studied experimentally. The electric field introduces three additional physical phenomena: (i) the surface charge redistribution, which eventually changes surface elasticity, (ii) the electroosmotic flow in the diffuse layer, and (iii) pressure build-up near the electrode toward which the electroosmotic flow is directed. It is shown that stabilization of the films is possible either due to the traction imposed by the electroosmotic flow directed upward (against gravity), or due to the pressure build-up near the lower end of the frame, in cases where the electroosmotic flow is directed downward (in the gravity direction) and enters a dead end at the lower electrode.

KW - Electrokinetic stabilization

KW - Electroosmosis

KW - Foams

KW - Gravitational drainage

KW - Surfactant films

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Experimental Investigation of Eletrokinetic Stabilization of Gravitational Drainage of Ionic Surfactants Films

Abstract

Keywords

ASJC Scopus subject areas

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