Abstract:

This dataset reports the droplet diameter of surfactant stabilized dodecane in water emulsions. Emulsions were stabilized with three different surfactants (Sodium dodecyl sulfate, Cetyltrimetylammonium bromide, and Triton X-100). Silica particles were suspended in solutions by either gentle mixing or vortexed mixing and zeta potentials were measured. Droplet diameters are also included for these solutions.

Suggested Citation:

Arijit Bose. 2016. Dataset for: "Response of Surfactant Stabilized Oil-in-Water Emulsions to the Addition of Particles in an Aqueous Suspension". Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7FN146Q

Publications:

Katepalli, H., & Bose, A. (2014). Response of Surfactant Stabilized Oil-in-Water Emulsions to the Addition of Particles in an Aqueous Suspension. Langmuir, 30(43), 12736–12742. doi:10.1021/la502291q

Purpose:

To investigate the addition of aqueous silica particles to surfactant stabilized emulsions.

Data Parameters and Units:

Figure 1d_Langmuir, 2014, 30, 12736-12742.csv: Droplet diameter (um); Sodium dodecyl sulfate (16 mM SDS, number % of droplets), Cetyltrimetylammonium bromide (2 mM CTAB, number % of droplets); 0.4 mM Triton X-100 (number % of droplets) For figure 2 files, samples were gently mixed Figure 2a_Langmuir, 2014, 30, 12736-12742.csv: Average diameter(um); Weight % of fumed silica; Sodium dodecyl sulfate (SDS); Cetyltrimetylammonium bromide (CTAB); Triton X-100 Figure 2b_Langmuir, 2014, 30, 12736-12742.csv: 200 drops measured, SDS; Droplet diameter (um); No particles added (number % of droplets); 0.05 wt% suspended silica particles added (number % of droplets); 0.1 wt % suspended silica particles added (number % of droplets); 0.5 wt% suspended silica particles added (number % of droplets); 1 wt% suspended silica particles added (number % of droplets) Figure 2c_Langmuir, 2014, 30, 12736-12742.csv: 200 drops measured, Triton X-100; Droplet diameter (um); No particles added (number % of droplets); 0.05 wt% suspended silica particles added (number % of droplets); 0.1 wt % suspended silica particles added (number % of droplets); 0.5 wt% suspended silica particles added (number % of droplets); 1 wt% suspended silica particles added (number % of droplets) Figure 2d_Langmuir, 2014, 30, 12736-12742.csv: 200 drops measured, CTAB; Droplet diameter (um); No particles added (number % of droplets); 0.05 wt% suspended silica particles added (number % of droplets); 0.1 wt % suspended silica particles added (number % of droplets); 0.5 wt% suspended silica particles added (number % of droplets); 1 wt% suspended silica particles added (number % of droplets) Figure 3_Langmuir, 2014, 30, 12736-12742.csv: zeta potential (mV); weight % of fumed silica; Sodium dodecyl sulfate (8 mM SDS), Cetyltrimetylammonium bromide (1 mM CTAB); 0.2 mM Triton X-100; Sodium chloride (8 mM NaCl) For figure 6 file, samples were vortexed Figure 6a_Langmuir, 2014, 30, 12736-12742.csv: Average diameter(um); Weight % of fumed silica; Sodium dodecyl sulfate (SDS); Cetyltrimetylammonium bromide (CTAB); Triton X-100 Figure 6b_Langmuir, 2014, 30, 12736-12742.csv: 200 drops measured, SDS; Droplet diameter (um); No particles added (number % of droplets); 0.05 wt% suspended silica particles added (number % of droplets); 0.1 wt % suspended silica particles added (number % of droplets); 0.5 wt% suspended silica particles added (number % of droplets); 1 wt% suspended silica particles added (number % of droplets) Figure 6c_Langmuir, 2014, 30, 12736-12742.csv: 200 drops measured, Triton X-100; Droplet diameter (um); No particles added (number % of droplets); 0.05 wt% suspended silica particles added (number % of droplets); 0.1 wt % suspended silica particles added (number % of droplets); 0.5 wt% suspended silica particles added (number % of droplets); 1 wt% suspended silica particles added (number % of droplets) Figure 6d_Langmuir, 2014, 30, 12736-12742.csv: 200 drops measured, CTAB; Droplet diameter (um); No particles added (number % of droplets); 0.05 wt% suspended silica particles added (number % of droplets); 0.1 wt % suspended silica particles added (number % of droplets); 0.5 wt% suspended silica particles added (number % of droplets); 1 wt% suspended silica particles added (number % of droplets)

Methods:

Sodium dodecyl sulfate (SDS, 99%) cetyltrimetrylammonium bromide (CTAB, 99%) Triton X-100 (98%) Hydrophilic fumed silica particles (Aerosil 200) Dodecane-in-water emulsions: SDS (approx. 16 mM); CTAB (approx. 2.0 mM); Triton X-100 (approx. 0.4 mM) Base emulsions: 0.2 mL dodecane, 1 mL surfactant solution, vortexed at 3000 rpm for 1 min 2 mixing methods: gentle mixing (slight shaking to avoid foaming) or vortexed (3000 rpm for 1 min) Samples rested for 24 hr after mixing Image-J measured average droplet size and distributions of approx. 200 droplets Gatan Alto 2500 cryo preparation system attached to a Zeiss Sigma VP field emission scanning electron microscope used to examine to droplet structure Zeta potential measured with malvern Zetasizer Nano-ZS (zeta potential measurement error was less than 2%)

Individual Files: