Direct Visualization of Cationic Surfactant Aggregates at a Cellulose−Water Interface

2009 ◽  
Vol 113 (42) ◽  
pp. 13895-13897 ◽  
Author(s):  
Shannon M. Notley
Keyword(s):  
Cationic Surfactant ◽  
Water Interface ◽  
Direct Visualization ◽  
Surfactant Aggregates

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.

The Displacement of Preadsorbed Protein with a Cationic Surfactant at the Hydrophilic SiO2−Water Interface

2001 ◽  
Vol 105 (38) ◽  
pp. 9331-9338 ◽  
Author(s):  
R. J. Green ◽  
T. J. Su ◽  
J. R. Lu ◽  
J. R. P. Webster
Keyword(s):  
Cationic Surfactant ◽  
Water Interface

Preparation of a new lignin-based anionic/cationic surfactant and its solution behaviour

RSC Advances ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2441-2448 ◽  
Author(s):  
Mingsong Zhou ◽  
Wenli Wang ◽  
Dongjie Yang ◽  
Xueqing Qiu
Keyword(s):  
Surface Tension ◽  
Cationic Surfactant ◽  
Anionic Surfactant ◽  
Water Interface ◽  
Air Water Interface ◽  
Solution Behaviour

The lignin-based cationic/anionic surfactant CA-SLs have a stronger ability to lower the surface tension at the air/water interface compared with SL–PEG, but a weaker one than CTAB.

Size of Cationic Surfactant Micelles at the Silica−Water Interface:  A Fluorescent Probe Study

Langmuir ◽  
2000 ◽  
Vol 16 (6) ◽  
pp. 2469-2474 ◽  
Author(s):  
Cecilia Ström ◽  
Per Hansson ◽  
Bengt Jönsson ◽  
Olle Söderman
Keyword(s):  
Fluorescent Probe ◽  
Cationic Surfactant ◽  
Water Interface ◽  
Surfactant Micelles

Study of Adsorbed Monolayers of a Cationic Surfactant and an Anionic Polyelectrolyte at the Air−Water Interface

Langmuir ◽  
2003 ◽  
Vol 19 (14) ◽  
pp. 5680-5690 ◽  
Author(s):  
Nirmesh J. Jain ◽  
Pierre-Antoine Albouy ◽  
Dominique Langevin
Keyword(s):  
Cationic Surfactant ◽  
Water Interface ◽  
Anionic Polyelectrolyte ◽  
Air Water Interface

scholarly journals Adsorption Kinetics of a Cationic Surfactant Bearing a Two-Charged Head at the Air-Water Interface

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 95 ◽  
Author(s):  
Marcos Fernández Leyes ◽  
Santiago Gimenez Reyes ◽  
Ezequiel Cuenca ◽  
Jhon F. Sánchez Morales ◽  
Hernán Ritacco
Keyword(s):  
Cationic Surfactant ◽  
Adsorption Process ◽  
Surface Concentration ◽  
Interfacial Region ◽  
Water Interface ◽  
Surface Tension Data ◽  
Time Resolved ◽  
Initial Stage ◽  
Wilhelmy Plate ◽  
Air Water Interface

We studied the dynamics of adsorption at the air-water interface of a cationic surfactant bearing two charges, Gemini 12-2-12, at concentrations below and above the critical micelle concentration (cmc). We used maximum bubble pressure and Wilhelmy plate techniques in order to access all time scales in the adsorption process. We found that the adsorption dynamics are controlled by diffusion at the initial stage of the adsorption process (milliseconds) and it is kinetically controlled by an electrostatic barrier (minute) approaching the equilibrium surfactant surface concentration. Between these two extremes, we found several relaxation phenomena, all following exponential decays with characteristic times spanning from one to hundreds of seconds. By means of time-resolved surface potential measurements, we show that these processes involve charge redistribution within the interfacial region. The surface tension data are analyzed and interpreted in the framework of the free energy approach.

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