Characteristics of spontaneously formed nanoemulsions in octane/AOT/brine systems

Kini, Gautam C.; Biswal, Sibani Lisa; Wong, Michael S.; Miller, Clarence A.

doi:10.1016/j.jcis.2012.07.041

Cited by 17 publications

(9 citation statements)

References 60 publications

(121 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It may result from a combination of coalescence of internal aqueous droplets (or with the external aqueous phase), mass transport of water from internal droplets to the external phase, and the breakup of larger oil drops due to convection inside oil droplets for system #3. As was proven in [16] with optical microscopy under similar conditions, the dilution with 0.4 % NaCl favors oil-continuous microemulsions forming a W/O/W multiple emulsion. This situation may happen because a higher salinity promotes the stability of W/O emulsions.…”

Section: Resultsmentioning

confidence: 52%

“…This stability could be explained through the microdrop structure. Kini et al [16] have shown that diameters over ca. 100 nm, there was enough AOT for an initial monolayer and at least an extra bilayer for an incipient lamellar phase coating.…”

Section: Resultsmentioning

confidence: 99%

“…It was shown [16], [17] that significantly different behavior and properties of resulting microemulsions can be tuned by the composition of the aqueous phase, e.g., the salinity of the initial nanoemulsion and diluents used to invert the phase. According to Winsor classification of emulsions (types I-IV), systems at three salinities were selected to form emulsions of different Winsor types [18]:  Winsor I, no salt added, system #1, vials 1 and 4,  Winsor IV, 0.2 % wt.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Spontaneous Emulsification Via Phase Inversion At Ambient Temperature For Stable N-Octane–Aerosol-OT/Water Microemulsions

Simonova¹,

Hibara²,

Samarina³

et al. 2021

Proceedings of the 7th World Congress on New Technologies

View full text Add to dashboard Cite

A reliable and straightforward way to prepare oil-in-water microemulsions based on AOT (Aerosol-OT, sodium 2ethylhexylsulfosuccinate)-n-octane-AOT/water or NaCl by a spontaneous-emulsification technique via dilution-triggered isothermal phase inversion in an inexpensive yet procurable way is demonstrated. The salt content adjusts the behavior and resulting microemulsions with long-term stability in the aqueous phase. Sudan I azo dye as a model solute is used to demonstrate variations in the resulting microemulsions and opportunities for preconcentration/separation or solute solubilization.

show abstract

Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Spontaneous Emulsification Via Phase Inversion At Ambient Temperature For Stable N-Octane–Aerosol-OT/Water Microemulsions

Simonova¹,

Hibara²,

Samarina³

et al. 2021

Proceedings of the 7th World Congress on New Technologies

View full text Add to dashboard Cite

show abstract

“…Hence, Span‐80 was used to stabilize the PEI solution‐in‐liquid paraffin emulsion for preparing the PA‐M microsphere . The selection of surfactant in the preparation of emulsions is often made based on a semi‐empirical scale, hydrophile‐lipophile balance (HLB) number . It is well known that a certain mixture of surfactants usually yield more stable emulsions than pure surfactants for a wider variety of application .…”

Section: Introductionmentioning

confidence: 99%

Stability of polyethylenimine solution‐in‐liquid paraffin emulsion for preparing polyamine microspheres with potential adsorption for ionic dyes

Huang

Wang

Zhu

et al. 2019

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

A microsphere synthesized by emulsion crosslinking of polyethylenimine (PEI) was applied in the removal of ionic dyes from water. Firstly, the stability of the PEI solution-in-liquid paraffin emulsion was improved by using the mixture of Span-80/Tween-80 as the emulsifier. The optimization by 2 5-1 fractional factorial design demonstrated the most stable emulsion was prepared at 0.07 g/mL of the emulsifier dosage, 6:4 (v:v) of the oil/water ratio, 20 % (wt %) of the PEI concentration, 6:1 (w:w) of the Span-80/Tween-80 ratio with a homogenization speed of 6000 r/min for 3 min at 25 o C. Then, the polyamine microsphere (PA-M) was obtained by crosslinking the PEI emulsion with glutaraldehyde. The PA-M microsphere can adsorb xylenol orange (XO) from aqueous solution with a capacity of 1169.2±12.5 mg/g. The amount of XO adsorption remained constant in the pH range of 2.0-11.0. Adsorption kinetics analysis demonstrated that Pseudo first-order model fit the experimental data better, indicating the overall adsorption process was controlled by 'surface reaction'. The XO adsorption on the microsphere was due to an electrostatic interaction according to the results of ΔG evaluation. The value of separation factor suggested the XO adsorption was favorable. The used PA-M microsphere can be regenerated and reused in adsorption/desorption operation at least 20 times.

show abstract

“…high pressure homogenization (Zhou et al, 2009;Fryd & Mason, 2012;Helgeson et al, 2014), flash nanoprecipitation through rapid mixing (Margulis et al, 2014) or ultrasonication (Delmas et al, 2011), and those using chemical routes (e.g. emulsion polymerization (Zhang et al, 2008a) and self-emulsification (Rang & Miller, 1999;López-Montilla et al, 2002;Kini et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Cryogenic transmission electron microscopy study: preparation of vesicular dispersions by quenching microemulsions

Lee

Morrison

Zhang

et al. 2016

Journal of Microscopy

View full text Add to dashboard Cite

We previously showed that long-lived nanoemulsions, seeming initially vesicular, might be prepared simply by diluting and cooling (quenching) warm microemulsions with n-hexadecane with precooled water. In this paper, we confirm that these systems are vesicular dispersions when fresh, and they can be made with similar structures and compositional dependence using alkanes with chain lengths ranging from octane to hexadecane. The nanostructures of fresh nanoemulsions are imaged with cryogenic transmission electron microscopy (cryo-TEM). We confirm that water-continuous microemulsions give simple dispersions of vesicles (sometimes unilamellar), typically less than 100 nm in diameter; these systems can avoid separation for over 2 months. Selected samples were also prepared using halogenated alkanes to create additional contrast in the cryo-TEM, allowing us to confirm that the oil is located in the observed vesicular structures.

show abstract

Characteristics of spontaneously formed nanoemulsions in octane/AOT/brine systems

Cited by 17 publications

References 60 publications

Spontaneous Emulsification Via Phase Inversion At Ambient Temperature For Stable N-Octane–Aerosol-OT/Water Microemulsions

Spontaneous Emulsification Via Phase Inversion At Ambient Temperature For Stable N-Octane–Aerosol-OT/Water Microemulsions

Stability of polyethylenimine solution‐in‐liquid paraffin emulsion for preparing polyamine microspheres with potential adsorption for ionic dyes

Cryogenic transmission electron microscopy study: preparation of vesicular dispersions by quenching microemulsions

Contact Info

Product

Resources

About