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 proceedingConference 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 languageEnglish (US)
Title of host publicationAIChE Annual Meeting, Conference Proceedings
Pages3300
Number of pages1
StatePublished - 2005
Externally publishedYes
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Other

Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
CountryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

Fingerprint

Agglomeration
Water
Polydimethylsiloxane
Emulsions
Polystyrenes
Microscopic examination
Viscosity
Scanning
Oils
Lasers

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Vernetti, J. P., Tarimala, S., Ranabothu, S. R., & Dai, L. (2005). Mobility and in-situ aggregation of charged microparticles at oil-water interfaces. In AIChE Annual Meeting, Conference Proceedings (pp. 3300)

Mobility and in-situ aggregation of charged microparticles at oil-water interfaces. / Vernetti, Jeremy P.; Tarimala, Sowmitri; Ranabothu, Srinivas R.; Dai, Lenore.

AIChE Annual Meeting, Conference Proceedings. 2005. p. 3300.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Vernetti, JP, Tarimala, S, Ranabothu, SR & Dai, L 2005, Mobility and in-situ aggregation of charged microparticles at oil-water interfaces. in AIChE Annual Meeting, Conference Proceedings. pp. 3300, 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase, Cincinnati, OH, United States, 10/30/05.
Vernetti JP, Tarimala S, Ranabothu SR, Dai L. Mobility and in-situ aggregation of charged microparticles at oil-water interfaces. In AIChE Annual Meeting, Conference Proceedings. 2005. p. 3300
Vernetti, Jeremy P. ; Tarimala, Sowmitri ; Ranabothu, Srinivas R. ; Dai, Lenore. / Mobility and in-situ aggregation of charged microparticles at oil-water interfaces. AIChE Annual Meeting, Conference Proceedings. 2005. pp. 3300
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