Neutron reflectivity studies of Aerosol-OT monolayers adsorbed at the oil/water, air/water and hydrophobic solid/wate interfaces

Li, Z.X.; Lu, Jian R.; Fragneto, Giovanna; Thomas, Robert K.; Binks, Bernard P.; Fletcher, Paul D. I.; Penfold, J.

doi:10.1016/s0927-7757(97)00252-5

Cited by 30 publications

(25 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5 and 7, the area per molecule of AOT at the octane/water (brine) interface assuming a fully ionized monolayer was estimated to range between 0.45 and 4 nm 2 /mol. The lower portion of the range is in agreement with AOT headgroup areas reported in literature 0.58-0.7 nm 2 /mol [50][51][52][53]. The higher values are for experiments where no NaCl was present and electrostatic repulsion between adjacent surfactant ions in the interface was greatest.…”

Section: Zeta Potential Of Octane Droplets In Different Winsor Regimessupporting

confidence: 90%

“…From droplet size diameters measured by DLS, the interfacial areas of all droplets at specific time points were estimated. Thus, using an AOT head group area of 0.69 nm 2 (see below), the required number of AOT monomers to stabilize the octane/water interface was estimated [51][52][53]. It was found that for the 70/20/10 system the available AOT monomers were more than sufficient to cover the interface for a mean drop diameter of 39 nm, the smallest reported mean diameter for this system.…”

Section: Phase Behavior and Interfacial Tensions Of Octane/aot/brine mentioning

confidence: 99%

See 1 more Smart Citation

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

Kini¹,

Biswal²,

Wong³

et al. 2012

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Zeta Potential Of Octane Droplets In Different Winsor Regimessupporting

confidence: 90%

Section: Phase Behavior and Interfacial Tensions Of Octane/aot/brine mentioning

confidence: 99%

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

Kini¹,

Biswal²,

Wong³

et al. 2012

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…1a to be 2.5 mM. This compares well with quoted values for the cmc of AOT: 2.5 mM (Li et al 1998) and 2.66 mM (Umlong and Ismail 2005). The data shown in Fig.…”

Section: Surface Tension Datasupporting

confidence: 90%

“…The critical micelle concentration (CMC) of SDS is 8 mM (Hernainz and Caro 2002;Sanchez-Camazano et al 2000). Aerosol-OT (AOT) solutions were similarly prepared from a stock solution to provide a concentration range from 5 Â 10 À5 to 5 Â 10 À3 M. The CMC of AOT is 2.5 mM (Li et al 1998). Five grams of soil was weighed into conical flasks and 50 ml of solution added, yielding a 0.1 (w/v) soil/solution ratio.…”

Section: Batch Experimentsmentioning

confidence: 99%

Aqueous Solution of Anionic Surfactants Mixed with Soils Show a Synergistic Reduction in Surface Tension

Hagenhoff¹,

Dong²,

Chowdhry³

et al. 2009

Water Air Soil Pollut

View full text Add to dashboard Cite

Water retention and transport in soils is dependent upon the surface tension of the aqueous phase. Surfactants present in aqueous solution reduce the surface tension of aqueous phase. In soil-water systems, this can result in water drainage and reductions in field capacity and hydraulic conductivity. In this investigation, the surface tension of surfactant solutions mixed with soil-in a constant fixed ratio-was measured as a function of surfactant concentration. Two anionic surfactants were used: sodium dodecyl sulphate and sodium bis (2-ethylhexyl) sulfosuccinate. Two soils were also used-a clay soil and a sandy soil. The key observation made by this investigation was that the addition of soil to the surfactant solution provided a further component of surface tension reduction. Neither soil sample reduced the surface tension of water when surfactant was absent from the aqueous phase, though both soils released soil organic matter at low surfactant concentrations as shown by measurement of the chemical oxygen demand of the supernatant solutions. Furthermore, both surfactants were shown to be weakly adsorbed by soil as shown by the use of a methylene blue assay. It is therefore proposed that the additional reduction in surface tension arises from synergistic interactions between the surfactants and dissolved soil organic matter.

show abstract

“…Neutron reflectometry also demonstrated that the oil/water interfacial thickness is 3 times thicker than air/water interface [37]. Due the presence of long decane molecules, the oil/water interface produces additional volume that is available for CTA + molecules.…”

Section: Discussionmentioning

confidence: 97%

Dynamic adsorption of cetyl trimethyl ammonium bromide at decane/water interface

Salamah

Phan

Pham

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

Neutron reflectivity studies of Aerosol-OT monolayers adsorbed at the oil/water, air/water and hydrophobic solid/wate interfaces

Cited by 30 publications

References 10 publications

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

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

Aqueous Solution of Anionic Surfactants Mixed with Soils Show a Synergistic Reduction in Surface Tension

Dynamic adsorption of cetyl trimethyl ammonium bromide at decane/water interface

Contact Info

Product

Resources

About