ArticleNanomaterials (Basel, Switzerland)2022
Characteristics and pH-Responsiveness of SDBS-Stabilized Crude Oil/Water Nanoemulsions.
Article in Nanomaterials (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed.
- Dissolved Oxygen Removal From Aqueous Phase of Prepared Thyme Essential Oil in Water Nanoemulsions and Assessment of Their Physico-Chemical Properties and Antibacterial Activities.Journal of food science · 2026Article
- A Multifunctional Core-Shell Nanoemulsion-Mediated Disruption of Asphaltene Aggregates for Unconventional Reservoir Oil Recovery Enhancement.Molecules (Basel, Switzerland) · 2026Article
- Review in Structure-Activity Relationships, Synthetic Regulation, and Applications of Mono/Di-Rhamnolipids.Microorganisms · 2026Review
- Nanoemulsion formulation of lemongrass essential oil using3 Biotech · 2025Article
- Experimental Study on a Nanoemulsion for EOR in High-Temperature, High-Salinity, Low-Permeability Reservoirs and Its Performance.ACS omega · 2025Article
- Intratympanic injection of emulsion-like dispersions to co-deliver cinnarizine and morin hydrate-lipoid E80 complex in a rabbit inner ear model.Therapeutic delivery · 2025Article
- Formulation and characterization of Caesalpinia decapetala seed oil nanoemulsion: physicochemical properties, stability, and antibacterial activity.Scientific reports · 2025Article
- Intratympanic injections of emulsion-like dispersions to augment cinnarizine amount in a healthy rabbit inner ear model.Nanomedicine (London, England) · 2024Article
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Abstract
Nanoemulsions are colloidal systems with a wide spectrum of applications in several industrial fields. In this study, crude oil-in-water (O/W) nanoemulsions were formulated using different dosages of the anionic sodium dodecylbenzenesulfonate (SDBS) surfactant. The formulated nanoemulsions were characterized in terms of emulsion droplet size, zeta potential, and interfacial tension (IFT). Additionally, the rheological behavior, long-term stability, and on-demand breakdown of the nanoemulsions via a pH-responsive mechanism were evaluated. The obtained results revealed the formation of as low as 63.5 nm average droplet size with a narrow distribution (33-142 nm). Additionally, highly negative zeta potential (i.e., -62.2 mV) and reasonably low IFT (0.45 mN/m) were obtained at 4% SDBS. The flow-ability of the nanoemulsions was also investigated and the obtained results revealed an increase in the nanoemulsion viscosity with increasing the emulsifier content. Nonetheless, even at the highest SDBS dosage of 4%, the nanoemulsion viscosity at ambient conditions never exceeded 2.5 mPa·s. A significant reduction in viscosity was obtained with increasing the nanoemulsion temperature. The formulated nanoemulsions displayed extreme stability with no demulsification signs irrespective of the emulsifier dosage even after one-month shelf-life. Another interesting and, yet, surprising observation reported herein is the pH-induced demulsification despite SDBS not possessing a pH-responsive character. This behavior enabled the on-demand breakdown of the nanoemulsions by simply altering their pH via the addition of HCl or NaOH; a complete and quick oil separation can be achieved using this simple and cheap demulsification method. The obtained results reveal the potential utilization of the formulated nanoemulsions in oilfield-related applications such as enhanced oil recovery (EOR), well stimulation and remediation, well-bore cleaning, and formation fracturing.
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