461120 Polyelectrolyte Coating of Nanoparticles for Applications in High Salinity Media

Monday, November 14, 2016: 3:15 PM
Bay View (Hotel Nikko San Francisco)
Joohyung Lee1, Ehsan Moaseri1, Muhammad Iqbal1, Yunping Fei1, Chola Dandamudi1, Behzad Chang1, Eric Annestrand1, Mengdi Sun1, Nijia Zhou1, Bonnie Lyon-Marion2, Jae Jin Han2, Kurt Pennell2, Christopher J. Ellison1 and Keith Johnston1, (1)The University of Texas at Austin, Austin, TX, (2)Tufts University, Medford, MA

Over the past decade, the interest in exploiting nanotechnology in high salinity media including seawater and brines relevant to environmental science and subsurface oil/gas reservoirs has grown markedly. In such media with high ionic strengths, the electrostatic repulsion between the nanoparticles (NPs) becomes very weak, often leading to immediate aggregation and precipitation of the particles. Herein we present a variety of synthetic strategies to graft water-soluble polyelectrolytes onto NP surfaces in order to overcome the unique challenges associated with NP stabilization in high salinity media. We show that the polyelectrolyte-grafted NPs not only display colloidal stability in high salinity at high temperature but also resist undesirable adsorption on model mineral surfaces. Finally, the nanoparticles be transported through consolidated rock with minimal retention.

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See more of this Session: Applications of Engineered Structured Particulates
See more of this Group/Topical: Particle Technology Forum