Gibbs elasticity, surface dilational modulus and diffusional relaxation in nonionic surfactant monolayers

2001 ◽  
Vol 186 (1-2) ◽  
pp. 63-72 ◽  
Author(s):  
E.H Lucassen-Reynders ◽  
A Cagna ◽  
J Lucassen
Keyword(s):  
Nonionic Surfactant ◽  
Surfactant Monolayers ◽  
Diffusional Relaxation ◽  
Gibbs Elasticity ◽  
Dilational Modulus

Surface Dilational Modulus or Gibbs' Elasticity of Protein Adsorption Layers

2004 ◽  
Vol 108 (26) ◽  
pp. 9173-9176 ◽  
Author(s):  
E. H. Lucassen-Reynders ◽  
V. B. Fainerman ◽  
R. Miller
Keyword(s):  
Protein Adsorption ◽  
Gibbs Elasticity ◽  
Adsorption Layers ◽  
Dilational Modulus

Numerical Analysis of Nonionic Surfactant Monolayers at Water/Air Interfaces

2004 ◽  
Vol 108 (35) ◽  
pp. 13353-13363 ◽  
Author(s):  
V. Cuny ◽  
M. Antoni ◽  
M. Arbelot ◽  
L. Liggieri
Keyword(s):  
Numerical Analysis ◽  
Nonionic Surfactant ◽  
Surfactant Monolayers ◽  
Air Interfaces

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.

Study of Methionine and Cumene Hydroperoxide Reaction Kinetics in the Presence of Nonionic Surfactant

2020 ◽  
Vol 57 (5) ◽  
pp. 427-433
Author(s):  
Lusine Harutyunyan ◽  
Gohar Petrosyan ◽  
Romik Harutyunyan
Keyword(s):  
Nonionic Surfactant ◽  
Reaction Kinetics ◽  
Cumene Hydroperoxide

Extraction of rare earth metals from trichloroacetate solutions in the presence of linear polyoxonium compounds

1991 ◽  
Vol 56 (8) ◽  
pp. 1585-1592 ◽  
Author(s):  
Petr Vaňura
Keyword(s):  
Rare Earth ◽  
Nonionic Surfactant ◽  
Separation Factor ◽  
Rare Earth Metals ◽  
Extraction Constants ◽  
Distribution Constants ◽  
Factor Α

Extraction of rare earth metals from lithium trichloroacetate solutions ( 1.20-2.88 mol l-1) with solutions of the commercial nonionic surfactant Slovafol 909 (p-nonylphenylnonaethylene glycol) in chloroform and dichloromethane was investigated. The extraction constants as well as the Slovafol 909 distribution constants were determined in the water-dichloromethane and water-chloroform systems. The lanthanide distribution ratios decrease with their atomic numbers first rather rapidly (approximately to Sm): the separation factor αSmLa = 1.54 and 1.87 in dichloromethane and in chloroform, respectively; for lanthanides with higher atomic numbers the drop is less pronounced (αLuLa = 2.42 and 2.85 in the two solvents, respectively).

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