Application of the Gibbs Equation to the Adsorption of Nonionic Surfactants and Polymers at the Air–Water Interface: Comparison with Surface Excesses Determined Directly using Neutron Reflectivity

Langmuir ◽  
2013 ◽  
Vol 29 (30) ◽  
pp. 9324-9334 ◽  
Author(s):  
Pei Xun Li ◽  
Zhi Xin Li ◽  
Hsin-Hui Shen ◽  
Robert K. Thomas ◽  
Jeffrey Penfold ◽  
...  
Keyword(s):  
Nonionic Surfactants ◽  
Neutron Reflectivity ◽  
Water Interface ◽  
Gibbs Equation ◽  
Air Water Interface

In situ neutron reflectivity studies of the adsorption of DNA by charged diblock copolymer monolayers at the air–water interface

Soft Matter ◽  
2012 ◽  
Vol 8 (27) ◽  
pp. 7161 ◽  
Author(s):  
Po-Wei Yang ◽  
Tsang-Lang Lin ◽  
I-Ting Liu ◽  
Yuan Hu ◽  
Michael James
Keyword(s):  
Diblock Copolymer ◽  
Neutron Reflectivity ◽  
Water Interface ◽  
Air Water Interface

scholarly journals Measurements of adsorption at the air-water interface by the microtome method

1936 ◽  
Vol 154 (883) ◽  
pp. 608-623 ◽  
Keyword(s):  
Dynamic Method ◽  
Fundamental Importance ◽  
Molecular Adsorption ◽  
Water Interface ◽  
Experimental Demonstration ◽  
Gibbs Equation ◽  
Experimental Conditions ◽  
Moving Surface ◽  
Wide Range ◽  
Air Water Interface

In spite of the wide use and fundamental importance of the classical Gibbs adsorption theorem, its validity has never been given adequate experimental demonstration. Until quite recently the principal means available for testing this theorem was the “moving bubble method”, developed by Donnan and Barker, and later by McBain, Davies, and DuBois. Almost without exception this method has given results many times greater than the values calculated from either the exact or the approximate Gibbs equation. A recent exhaustive investigation of this dynamic method by DuBois and Todd has shown, moreover, that the results for moving bubbles may be varied and controlled over a wide range by merely altering the size or speed of the bubbles or the amount of accompanying liquid. Thus the results, although definite and repro­ducible, vary greatly with the experimental conditions, and hence they bear no definite relation either to the Gibbs value or to that for mono-molecular adsorption. It is evident that a moving surface carries in general an amount of adsorbed material which is much greater than that predicted by the Gibbs theorem. Similar high results are reported by Seymour, Tartar, and Wright for moving droplets of benzene in water, which may carry with them as much soap as would correspond to twenty or more mono-layers.

scholarly journals Smart nanogels at the air/water interface: structural studies by neutron reflectivity

Nanoscale ◽  
2016 ◽  
Vol 8 (9) ◽  
pp. 4951-4960 ◽  
Author(s):  
Katarzyna Zielińska ◽  
Huihui Sun ◽  
Richard A. Campbell ◽  
Ali Zarbakhsh ◽  
Marina Resmini
Keyword(s):  
Neutron Reflectivity ◽  
Water Interface ◽  
Structural Studies ◽  
Air Water Interface ◽  
Interfacial Behaviour ◽  
Cross Linker

Structure of the NIPAM-based nanogels at the air/water interface. Nanogel interfacial behaviour was correlated with and their morphology determined mostly by the amount of cross-linker.

Modeling Adsorption of Cationic Surfactants at Air/Water Interface without Using the Gibbs Equation

Langmuir ◽  
2013 ◽  
Vol 29 (15) ◽  
pp. 4743-4749 ◽  
Author(s):  
Chi M. Phan ◽  
Thu N. Le ◽  
Cuong V. Nguyen ◽  
Shin-ichi Yusa
Keyword(s):  
Cationic Surfactants ◽  
Water Interface ◽  
Gibbs Equation ◽  
Air Water Interface

Quantum-chemical analysis of hexagonal crystalline monolayers of ethoxylated nonionic surfactants at the air/water interface

2014 ◽  
Vol 16 (45) ◽  
pp. 25129-25142 ◽  
Author(s):  
Elena S. Kartashynska ◽  
Yuri B. Vysotsky ◽  
Elena A. Belyaeva ◽  
Valentin B. Fainerman ◽  
Dieter Vollhardt ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Quantum Chemical ◽  
Nonionic Surfactants ◽  
Water Interface ◽  
Quantum Chemical Analysis ◽  
Air Water Interface
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