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

ASJC Scopus subject areas

  • Engineering(all)

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    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)