The Schulman Method of Cosurfactant Titration of the Oil/Water Interface (Dilution Method): A Review on a Well-Known Powerful Technique in Interfacial Science for Characterization of Water-in-Oil Microemulsions

2015 ◽  
Vol 18 (4) ◽  
pp. 547-567 ◽  
Author(s):  
Soumik Bardhan ◽  
Kaushik Kundu ◽  
Gulmi Chakraborty ◽  
Swapan K. Saha ◽  
Bidyut K. Paul
Keyword(s):  
Dilution Method ◽  
Water Interface ◽  
Interfacial Science ◽  
Powerful Technique ◽  
Oil Water

Characterization of the microwave-induced boiling behaviour at oil/water interface

2020 ◽  
Vol 159 ◽  
pp. 120107
Author(s):  
Satoshi Sonobe ◽  
Yosuke Shibata ◽  
Yusuke Asakuma ◽  
Anita Hyde ◽  
Chi Phan
Keyword(s):  
Water Interface ◽  
Oil Water

Electrochemical characterization of an oil/water alternately wetted rotating cylinder electrode

CORROSION ◽  
10.5006/3638 ◽  
2020 ◽  
Author(s):  
Linxiao Zheng ◽  
Ziming Wang ◽  
Guang-Ling Song
Keyword(s):  
Rotating Cylinder ◽  
Water Interface ◽  
Current Waveform ◽  
Longitudinal Displacement ◽  
Flow Conditions ◽  
Rotating Cylinder Electrode ◽  
Electrochemical Current ◽  
Oil Water ◽  
Displacement Speed

To characterize the corrosion at oil/water interfaces, a vertically adjustable rotating cylinder electrode (VA-RCE) was developed based on the concept of “alternate wetting cell”, in which the electrochemical current reflecting the wet state of the RCE surface can be continuously monitored. Under a sinusoidal moving mode, the current waveform varied with the rotation rate and the longitudinal displacement speed or amplitude of the VA-RCE, implying that the dynamic wetting behavior of the VA-RCE surface in the oil/water interface region was influenced by the flow conditions; the replacement of oil phase by water phase became easier with increasing flow rate and alternating frequency of change between water wet and oil wet. The results also indicated that the wettability of the VA-RCE surface could be modified by the formation of corrosion products. All the results suggested that the VA-RCE could be used to quantitatively characterize the dynamic water/oil wetting state and the corrosion at an oil/water interface in a multiphase flow.

scholarly journals Stabilization of soybean oil by flaxseed gum and NMR characterization of its oil–water interface

2019 ◽  
Vol 17 (1) ◽  
pp. 892-899
Author(s):  
Mei-Qin Feng ◽  
Meng Wang ◽  
Jian Sun ◽  
Xing-Lian Xu ◽  
Guang-Hong Zhou
Keyword(s):  
Soybean Oil ◽  
Water Interface ◽  
Nmr Characterization ◽  
Oil Water ◽  
Flaxseed Gum

scholarly journals Characterization of Solids from Oilfield Emulsions

2005 ◽  
Vol 13 (6) ◽  
pp. 28-31
Author(s):  
Richard W. Cloud ◽  
Rebecca L. Ramsey ◽  
Robert A. Pultz ◽  
Michael K. Poindexter
Keyword(s):  
Crude Oil ◽  
Gas Evolution ◽  
Water Interface ◽  
Case Scenario ◽  
Pressure Drops ◽  
Liquid Phases ◽  
Oil Water ◽  
Water Gas ◽  
Oil Gas

Production of crude oil is generally accompanied by several other product phases, namely water, gas and solids. Pressure drops across chokes, concomitant gas evolution (due to pressure drops) and turbulence caused by various pipeline configurations can create difficult-to-resolve emulsions. Natural crude oil surfactants and solids exacerbate the problem further by migrating to the newly created oil-water interface and stabilizing the unwanted emulsions. Once the fluids arrive at the production facilities, a variety of vessels are employed to separate the oil, gas and water. Depending on the wettability of the solids, they will exit via one or both of the liquid phases. In a worse case scenario, the solids will accumulate at the oil-water interface.

Porous materials from cellulose nanocrystal and mxene surfactants at the oil/water interface

2020 ◽  
Author(s):  
Bingqing qian ◽  
Haiqiao Wang ◽  
Dong Wang ◽  
Hao-Bin Zhang ◽  
Jessica Wu ◽  
...  
Keyword(s):  
Porous Materials ◽  
Cellulose Nanocrystal ◽  
Water Interface ◽  
Oil Water

Polarizability and nonpolarizability of oil-water interfaces with relevance to a.c. impendance measurements

1991 ◽  
Vol 56 (1) ◽  
pp. 112-129 ◽  
Author(s):  
Takashi Kakiuchi ◽  
Mitsugi Senda
Keyword(s):  
Charge Transfer ◽  
Numerical Calculation ◽  
Supporting Electrolyte ◽  
Water Interface ◽  
Migration Effect ◽  
Ac Current ◽  
Stationary Interface ◽  
Oil Water ◽  
Anion Transfer

We have estimated the degree of polarizability of a polarized oil-water interface used as a working interface and that of the nonpolarizability of a nonpolarized interface used as a reference oil-water interface from the numerical calculation of dc and ac current vs potential behavior at both interfaces. Theoretical equations of dc and ac currents for simultaneous cation and anion transfer of supporting electrolytes have been derived for the planar stationary interface for reversible and quasi-reversible cases. In the derivation, the migration effect and the coupling of the cation and anion transfer have been incorporated. The transfer of ions constituting a supporting electrolyte contributes to the total admittance of the interface even in the region where the interface may be considered as polarized in dc sense, as pointed out first by Samec et al. (J. Electroanal. Chem. 126, 121 (1981)). Moreover, the reference oil-water interface is not ideally reversible, so that the contribution from this interface to the measured admittance cannot be negligible, unless the area of the reference oil-water interface is much larger than that of the working oil-water interface. The effect of non-ideality of the reference oil-water interface on the determination of double layer capacitances and kinetic parameters of charge transfer at the working oil-water interface has been estimated.

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