Interfacial tensions in simple oil-water-surfactant systems near their three-phase region

1988 ◽  
Vol 266 (3) ◽  
pp. 283-290 ◽  
Author(s):  
K. Selcan ◽  
K. K�hler ◽  
G. H. Findenegg
Keyword(s):  
Phase Region ◽  
Interfacial Tensions ◽  
Three Phase ◽  
Oil Water ◽  
Surfactant Systems

Low interfacial tensions in three-phase systems obtained with oil-water surfactant mixtures

1980 ◽  
Vol 76 (2) ◽  
pp. 277-281 ◽  
Author(s):  
A. Pouchelon ◽  
J. Meunier ◽  
D. Langevin ◽  
D. Chatenay ◽  
A.M. Cazabat
Keyword(s):  
Surfactant Mixtures ◽  
Interfacial Tensions ◽  
Three Phase ◽  
Oil Water ◽  
Phase Systems

Phase Equilibrium of Mg-Nd-Zn System near Mg-Nd Side at 400°C

2016 ◽  
Vol 873 ◽  
pp. 18-22
Author(s):  
Ming Li Huang ◽  
Xue Shen ◽  
Hong Xiao Li
Keyword(s):  
Solid Solution ◽  
Phase Equilibrium ◽  
Ternary Isothermal Section ◽  
Phase Region ◽  
X Ray Diffraction ◽  
Maximum Solubility ◽  
Two Phase ◽  
Solubility Range ◽  
Three Phase ◽  
Equilibrium Alloys

The equilibrium alloys closed to Mg-Nd side in the Mg-rich corner of the Mg-Zn-Nd system at 400°C have been investigated by scanning electron microscopy, electron probe microanalysis and X-ray diffraction. The binary solid solutions Mg12Nd and Mg3Nd with the solubility of Zn have been identified. The maximum solubility of Zn in Mg12Nd is 4.8at%, and Mg12Nd phase can be in equilibrium with Mg solid solution. However, only when the solubility range of Zn in 26at%~32.2at%, Mg3Nd can be in two-phase equilibrium with Mg solid solution. As the results, two two-phase regions as Mg+Mg12Nd and Mg+Mg3Nd and a three-phase region as Mg+Mg12Nd+Mg3Nd in Mg-Nd-Zn ternary isothermal section at 400°C have been identified.

Nature of the oil/water interface and equilibrium surfactant aggregates in systems exhibiting low tensions

1988 ◽  
Vol 66 (12) ◽  
pp. 3031-3037 ◽  
Author(s):  
Robert Aveyard ◽  
Bernard P. Binks ◽  
Thomas A. Lawless ◽  
Jeremy Mead
Keyword(s):  
Molecular Structure ◽  
Sodium Chloride ◽  
Water Interface ◽  
Rich Phase ◽  
Aqueous Sodium ◽  
Interfacial Tensions ◽  
Aerosol Ot ◽  
Surfactant Aggregates ◽  
Monolayer Adsorption ◽  
Oil Water

Oil/water interfacial tensions are reported for systems containing pure alkane, aqueous sodium chloride, and a pure anionic surfactant, either Aerosol OT or p-dihexylbenzene sodium sulphonate (DHBS). Evidence is produced to support the claim that monolayer adsorption at the oil/water interface can produce ultralow tensions (~ 1 µN m−1), and that the presence at the interface of a third, surfactant-rich phase is not necessary. The aggregation of DHBS and its distribution between oil and aqueous phases of various salinities have been investigated. It has been confirmed that the behaviour of DHBS in these respects is similar to that of Aerosol OT, as might be expected from its molecular structure. The sizes of microemulsion droplets in equilibrium with planar adsorbed monolayers have been determined, and related to the tensions of the plane oil/aqueous phase interfaces using simple existing theory.

Hydrodynamics and mass transfer of oil–water micro-emulsion in a three phase internal airlift reactor

Fuel ◽  
2012 ◽  
Vol 97 ◽  
pp. 197-201 ◽  
Author(s):  
Mostafa Keshavarz Moraveji ◽  
Mahboubeh Jafarkhani ◽  
Baharak Sajjadi ◽  
Reza Davarnejad
Keyword(s):  
Mass Transfer ◽  
Airlift Reactor ◽  
Three Phase ◽  
Micro Emulsion ◽  
Oil Water

Particles in monolayers and thin liquid films

Surfactants ◽  
2019 ◽  
pp. 467-500
Author(s):  
Bob Aveyard
Keyword(s):  
Free Energy ◽  
Particle Surface ◽  
Line Tension ◽  
Liquid Films ◽  
Thin Liquid Films ◽  
Fluid Interfaces ◽  
Free Energy Of Adsorption ◽  
Three Phase ◽  
Oil Water ◽  
Particle Adsorption

Small particles can adsorb strongly at fluid interfaces and form monolayers which can be studied using a Langmuir trough. For sufficiently large particles the monolayers can be viewed microscopically. The driving force for particle adsorption is the concomitant removal of fluid/fluid interface. For very small adsorbed particles, the free energy of forming the three-phase contact line around particles (hence the line tension) may also contribute significantly to the free energy of adsorption. Adsorption can be enhanced by having areas of particle surface with different wettability (Janus particles). Monolayers have structures dependent on lateral interactions between particles; for particles at the oil/water interface, electrical repulsion through oil is often the dominant interaction, which can give rise to highly ordered monolayers. Adsorbed particles can either inhibit or facilitate the formation of stable thin liquid films, depending on particle wettability.

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