426506 Investigating Emulsion Stability and the Impact of Surfactant Type on Transient Emulsion Behavior Using Diffusion Nuclear Magnetic Resonance Techniques

Monday, November 9, 2015: 1:42 PM
Canyon A (Hilton Salt Lake City Center)
Deepika Venkataramani1, Jarred Kelsey2, Ashwin Kumar1, Jeff White2, Nicholas Briggs3, Steven Crossley3 and Clint P. Aichele1, (1)School of Chemical Engineering, Oklahoma State University, Stillwater, OK, (2)Department of Chemistry, Oklahoma State University, Stillwater, OK, (3)School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, OK

Emulsions are ubiquitous in nature and industry. Fundamental understanding of these dynamic systems is critical to manage industrial processes such as those found in the energy and biofuels industries. Despite the relevance and history of emulsions, significant understanding is still lacking for concentrated emulsions, especially for those formed using solids as surfactants. This work utilizes nuclear magnetic resonance (NMR) to bridge some of these gaps for concentrated emulsions. A series of experiments are presented for model oils and well characterized surfactants and solids in order to elucidate the impact of stabilizer type on dynamic emulsion behavior. A particular focus of the presentation is on the impact of silica and carbon nanotube stabilizers on dynamic emulsion behavior. The impact of water fraction on emulsion stability and droplet size distributions is also discussed. The diffusion NMR data provide insight about both the speciation and diffusion characteristics of the emulsions investigated.

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See more of this Session: Emulsions and Foams I
See more of this Group/Topical: Engineering Sciences and Fundamentals