Abstract:

Oil-in-water emulsions were formed and stabilized at low amphiphile concentrations by combining hydrophilic nanoparticles (NPs) (i.e., bare colloidal silica) with a weakly interacting zwitterionic surfactant, caprylamidopropyl betaine (CAPB), to generate a high hydrophilic-lipophilic balance. This dataset reports results from static light scattering (SLS) used to determine droplet size distribution for dodecane-in-deionized water and dodecane-in-synthetic sea water emulsions. SLS data are presented immediately after emulsions were prepared and after 1 and 24 hours after prepration for both treatments. Viscosity of dodecane-in-deionized water and dodecane-in-synthetic sea water emulsions are included. Viscosity of the aqueous phase in the absence of oil was measured using a AR-G2 rhometer for a shear rate from 0.01 to 1000 s^-1. Data used to calculate the emulsion formulation using the DLVO theory are provided. These data were used in the publication Worthen, A. J., et al. (2014) Synergistic Formation and Stabilization of Oil-in-Water Emulsions by a Weakly Interacting Mixture of Zwitterionic Surfactant and Silica Nanoparticles. Langmuir, 30(4), 984–994. doi:10.1021/la404132p.

Suggested Citation:

Worthen, Andrew; Foster, Lynn; Dong, Jiannan; Bollinger, Jonathan; Peterman, Adam; Pastora, Lucinda; Bryant, Steven; Truskett, Thomas; Bielawski, Christopher; Johnston, Keith. 2016. Dataset for: Synergistic Formation and Stabilization of Oil-in-Water Emulsions by a Weakly-Interacting Mixture of Zwitterionic Surfactant and Silica Nanoparticles. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N77H1GJ3

Publications:

Worthen, A. J., Foster, L. M., Dong, J., Bollinger, J. A., Peterman, A. H., Pastora, L. E., … Johnston, K. P. (2014). Synergistic Formation and Stabilization of Oil-in-Water Emulsions by a Weakly Interacting Mixture of Zwitterionic Surfactant and Silica Nanoparticles. Langmuir, 30(4), 984–994. doi:10.1021/la404132p

Purpose:

The objective of this study is to form and stabilize oil-in-water emulsions at unusually low amphiphile concentrations by combining a very weakly interacting mixture of hydrophilic NPs (bare colloidal silica) and a zwitterionic surfactant (CAPB) with a high hydrophobic/lipophilic balance.

Data Parameters and Units:

DLVO sphere vs plate.xmcd-- mathcad file used for DLVO calculations; Worthen NP floc size data.xlsx-- CAPB Conc (% w/v), Floc Diameter (um), time elapsed [t=0, t=1 hour, t=24 hours], Worthen Rheology data summary.xlsx-- Shear rate (1/seconds), Viscosity (cP centipoise)

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