A Simple Molecular Model for the Spontaneous Curvature and the Bending Constants of Nonionic Surfactant Monolayers at the Oil/Water Interface†

Langmuir ◽  
2000 ◽  
Vol 16 (23) ◽  
pp. 8917-8925 ◽  
Author(s):  
Vesselin N. Paunov ◽  
Stanley I. Sandler ◽  
Eric W. Kaler
Keyword(s):  
Nonionic Surfactant ◽  
Molecular Model ◽  
Spontaneous Curvature ◽  
Water Interface ◽  
Surfactant Monolayers ◽  
Oil Water

Ellipsometry Studies of Nonionic Surfactant Adsorption at the Oil−Water Interface

Langmuir ◽  
2005 ◽  
Vol 21 (1) ◽  
pp. 149-159 ◽  
Author(s):  
Jan-Willem Benjamins ◽  
Krister Thuresson ◽  
Tommy Nylander
Keyword(s):  
Nonionic Surfactant ◽  
Surfactant Adsorption ◽  
Water Interface ◽  
Oil Water

The Determination of the Structure and Coverage of Nonionic Surfactant Monolayers at the Air-Water Interface Using Neutron Reflection Technique

1994 ◽  
Vol 376 ◽  
Author(s):  
Jian R. Lu ◽  
Robert K. Thomas
Keyword(s):  
Nonionic Surfactant ◽  
Gaussian Distribution ◽  
Water Interface ◽  
Surfactant Monolayers ◽  
Neutron Reflection ◽  
Air Water Interface ◽  
Oligoethylene Glycols

ABSTRACTThe coverage and structure of the monododecyl ethers of oligoethylene glycols, C12Em where m = 2, 4, 6 and 8, adsorbed at the air-water interface have been studied by neutron reflection. At their c.m.c.s, the area per molecule is 33 ± 3 Å2 for C12E2, 44 ± 3 Å2 for C12E4 55 ± 3 Å2 for C12E6 and 62 ± 3 Å2 for C12E8. In terms of the width of a Gaussian distribution at 1/e of its height the thicknesses of the dodecyl chains are found to be constant at 16 ± 2 Å and those of the heads to vary from 11 to 19±2Å from m = 2 to 8. There is also found to be some overlap between the two chains at the interface.

Sum-Frequency Spectroscopy of Surfactant Monolayers at the Oil−Water Interface

2003 ◽  
Vol 107 (39) ◽  
pp. 10801-10814 ◽  
Author(s):  
Mona Marie Knock ◽  
Graham R. Bell ◽  
Elisabeth K. Hill ◽  
Hannah J. Turner ◽  
Colin D. Bain
Keyword(s):  
Water Interface ◽  
Surfactant Monolayers ◽  
Sum Frequency ◽  
Sum Frequency Spectroscopy ◽  
Oil Water

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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