Mobility and in-situ aggregation of charged microparticles at oil-water interfaces

Jeremy P. Vernetti; Sowmitri Tarimala; Srinivas R. Ranabothu; Lenore Dai

Mobility and in-situ aggregation of charged microparticles at oil-water interfaces

Jeremy P. Vernetti, Sowmitri Tarimala, Srinivas R. Ranabothu, Lenore Dai

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Particle mobility, aggregate structure, and the mechanism of aggregate growth at the two-dimensional level have been of long-standing interest. Here we use solid-stabilized emulsions as a model system to investigate the mobility of charged microparticles at polydimethylsiloxane (oil)-water interfaces using confocal laser scanning microscopy. Remarkably, the rate of diffusion of the charged colloidal-sized polystyrene particles at the oil-water interface is only moderately slower than in the bulk water phase. The ambient diffusion constant of solid particles is significantly reduced from 1.1, e10-9 cm2/s to 2.1, e10-11 cm2/s when the viscosity of the oil phase increases from 5 cSt to 350 cSt. In addition, we successfully observe the in-situ structural formation of solid particles at the oil-water interface.

Original language	English (US)
Title of host publication	AIChE Annual Meeting, Conference Proceedings
Pages	3300
Number of pages	1
State	Published - 2005
Externally published	Yes
Event	05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States Duration: Oct 30 2005 → Nov 4 2005

Other

Other	05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Country/Territory	United States
City	Cincinnati, OH
Period	10/30/05 → 11/4/05

ASJC Scopus subject areas

Engineering(all)

Cite this

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title = "Mobility and in-situ aggregation of charged microparticles at oil-water interfaces",

abstract = "Particle mobility, aggregate structure, and the mechanism of aggregate growth at the two-dimensional level have been of long-standing interest. Here we use solid-stabilized emulsions as a model system to investigate the mobility of charged microparticles at polydimethylsiloxane (oil)-water interfaces using confocal laser scanning microscopy. Remarkably, the rate of diffusion of the charged colloidal-sized polystyrene particles at the oil-water interface is only moderately slower than in the bulk water phase. The ambient diffusion constant of solid particles is significantly reduced from 1.1, e10-9 cm2/s to 2.1, e10-11 cm2/s when the viscosity of the oil phase increases from 5 cSt to 350 cSt. In addition, we successfully observe the in-situ structural formation of solid particles at the oil-water interface.",

author = "Vernetti, {Jeremy P.} and Sowmitri Tarimala and Ranabothu, {Srinivas R.} and Lenore Dai",

year = "2005",

language = "English (US)",

pages = "3300",

booktitle = "AIChE Annual Meeting, Conference Proceedings",

note = "05AIChE: 2005 AIChE Annual Meeting and Fall Showcase ; Conference date: 30-10-2005 Through 04-11-2005",

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T1 - Mobility and in-situ aggregation of charged microparticles at oil-water interfaces

AU - Vernetti, Jeremy P.

AU - Tarimala, Sowmitri

AU - Ranabothu, Srinivas R.

AU - Dai, Lenore

PY - 2005

Y1 - 2005

N2 - Particle mobility, aggregate structure, and the mechanism of aggregate growth at the two-dimensional level have been of long-standing interest. Here we use solid-stabilized emulsions as a model system to investigate the mobility of charged microparticles at polydimethylsiloxane (oil)-water interfaces using confocal laser scanning microscopy. Remarkably, the rate of diffusion of the charged colloidal-sized polystyrene particles at the oil-water interface is only moderately slower than in the bulk water phase. The ambient diffusion constant of solid particles is significantly reduced from 1.1, e10-9 cm2/s to 2.1, e10-11 cm2/s when the viscosity of the oil phase increases from 5 cSt to 350 cSt. In addition, we successfully observe the in-situ structural formation of solid particles at the oil-water interface.

AB - Particle mobility, aggregate structure, and the mechanism of aggregate growth at the two-dimensional level have been of long-standing interest. Here we use solid-stabilized emulsions as a model system to investigate the mobility of charged microparticles at polydimethylsiloxane (oil)-water interfaces using confocal laser scanning microscopy. Remarkably, the rate of diffusion of the charged colloidal-sized polystyrene particles at the oil-water interface is only moderately slower than in the bulk water phase. The ambient diffusion constant of solid particles is significantly reduced from 1.1, e10-9 cm2/s to 2.1, e10-11 cm2/s when the viscosity of the oil phase increases from 5 cSt to 350 cSt. In addition, we successfully observe the in-situ structural formation of solid particles at the oil-water interface.

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M3 - Conference contribution

AN - SCOPUS:33645649292

SP - 3300

BT - AIChE Annual Meeting, Conference Proceedings

T2 - 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase

Y2 - 30 October 2005 through 4 November 2005

ER -

Mobility and in-situ aggregation of charged microparticles at oil-water interfaces

Abstract

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ASJC Scopus subject areas

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