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Thursday, May 14, 2020 | History

2 edition of Electrostatic effects on surfactant adsorption found in the catalog.

Electrostatic effects on surfactant adsorption

Mohd H. Hassan

Electrostatic effects on surfactant adsorption

by Mohd H. Hassan

  • 235 Want to read
  • 33 Currently reading

Published .
Written in English

    Subjects:
  • Surface active agents.,
  • Electrostatics.,
  • Adsorption.

  • Edition Notes

    Statementby Mohd H. Hassan.
    The Physical Object
    Paginationix, 62, [26] leaves, bound :
    Number of Pages62
    ID Numbers
    Open LibraryOL18666116M

    tions of surfactant below the CMC and fitting these data to the Szyszkowski equation. The equilibrium constant for adsorp-tion can also be used to calculate the standard Gibbs energy of adsorption: (5) Above the CMC, surfactant molecules begin to self-assem-ble into micelles. Any additional surfactant molecules will be in - corporated into. 5 where Z is the valence of the surfactant ion (Z=0 for a nonionic surfactant), e is the elementary charge, ψs is the surface electric potential (provided that the electric potential in the bulk of solution is zero), A is a constant accounting for the non-electrostatic interactions among the adsorbed amphiphiles. The combination of Eq. (6) with the general Gibbs equation.

    In the first stage, the electrostatic adsorption between surfactant ions and the negatively charged () basal planes is the dominant driving force for the considerable increase in the adsorbed amounts greatly, in addition to the cation exchange adsorption between the surfactant and the potassium ions released on the muscovite by: 6. the graphene particle surface are sufficient to drive the adsorption of dye from solution. These results collectively demonstrate the versatility of surfactant stabilised graphene adsorption at interfaces, which is made possible by the nature of the stabilising surfactant Author: Alison Yue Wan Sham.

      A general introduction to surfactants, surface activity, and surfactant applications Important advances in the tools available for studying the activity of surfactants has significantly increased scientific understanding of interfaces at the molecular level. However, there is still much to be learned. In this Third Edition of the successful classic, author and expert Drew Myers combines the Author: Drew Myers. An investigation of chitosan and sodium dodecyl sulfate A polymer/surfactant association is a cooperative phenomenon in usually through electrostatic or hydrophobic forces. As is already known, polyelectro-lytes may interact with oppositely charged surfactants through electrostatic.


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Electrostatic effects on surfactant adsorption by Mohd H. Hassan Download PDF EPUB FB2

Chi M. Phan, in Physical Chemistry of Gas-Liquid Interfaces, Ionic Binding. In this model, the surfactant adsorption is governed by the adsorption of the tails. Some of the counterions can penetrate into the surfactant layer through electrostatic interactions with charged surfactant heads.

Electrostatic Effects during Surfactant Adsorption MOH'D H. HASSAN AND RICHARD L. ZOLLARS1 Department of Chemical Engineering, Washington State University, Pullman, Washington Received Electrostatic effects on surfactant adsorption book 2, ; accepted Ma The adsorption of surface-active materials is often modeled with empirical or semiempirical equations which frequently fail to account for key features Cited by: 2.

Surfactant adsorption in porous media is one of the major criteria which decide the economic viability of surfactant flooding in chemical enhance oil recovery applications (CEOR).

In this study, the static adsorption of a novel in-house synthesized anionic surfactant was investigated onto crushed Berea sandstone. The point of zero (PZC) charge for Berea sandstone and critical micelle Cited by: Ion-Specific Effects on Equilibrium Adsorption Layers of Ionic Surfactants Article (PDF Available) in Reviews in Chemical Engineering 2(2):1 January with 94 Reads How we measure 'reads'.

explicitly for the role of the ion-specific effects in the ionic surfactant s‟ adsorption and determined their adsorption constant s K s. In Ref [17] they investigated the effect of Li +, Na +.

indicating their limits of validity. We study the case of surfactant mixtures, focusing on the relation between the mixture kinetics and the properties of its individual constituents.

Strong electrostatic interactions in salt-free ionic surfactant solutions drastically modify the adsorption kinetics. In this case the theory accounts for. Hydrophilic silica nanoparticles alone are not surface active.

They, however, develop a strong electrostatic interaction with ionic surfactants and consequently affect their surface behavior.

We Cited by: 8. at pH and the maximum adsorption of anionic surfac-tant was mg/g. Furthermore, the effects of alkali, salinity and temperature on static adsorption of anionic surfactant were investigated at variable conditions. It was concluded that the anionic surfactant performs better at higher pH, higher temperature and lower salt by: Adsorption of Polymer and Surfactant from Their Binary Mixtures on Alumina Kunio Esumi Chapter 8, DOI: /bkch Publication Date (Print): May 5, S.

Tcholakova et al., “Role of surfactant type and concentration for the mean drop size during emulsification in turbulent flow”, Langmuir 20 () S. Tcholakova et al., “Coalescence stability of emulsions containing globular milk. Surface excess and thermodynamics of adsorption Following on the formation of an oriented surfactant monolayer, a fundamental associated physical quantity is the surface excess.

This is defined as the concentration of surfactant molecules in a surface plane, relative to File Size: 1MB. Electrostatic Effects on the Phase Behavior of Aqueous Cetyltrimethylammonium Bromide and Sodium Octyl Sulfate Mixtures with Added Sodium BromideCited by: We present a theory for the kinetics of surfactant adsorption at the interface between an aqueous solution and another fluid (air, oil) phase.

The model relies on a free-energy formulation. It describes both the diffusive transport of surfactant molecules from the bulk solution to the interface and the kinetics taking place at the interface itself.

Adsorption of a Cationic Laser Dye onto Polymer/Surfactant Complex Film Fabricated by Layer-by-Layer Electrostatic Self-Assembly Technique P. Paula*, S. Hussainb, D. Bhattacharjeeb and M. Palc a. Department of Physics, Jadavpur University, Jadavpur, Kolkata, West Bengal, India b.

nonionic and cationic-nonionic surfactant mixtures suggesU that the synergism arises mainly from the chain-chain interaction between the two surfactants in the adsorbed state. C Academic ~ IK. INTRODUCfION Surfactant depletion due to adsorption on reservoir minerals and precipitation with dis-solved cations is a major problem in chemical.

How to cite this article: Abbas A, wan S W, ZaidiJaafar M, Augustine A A. Anionic Surfactant Adsorption: Insight for Enhanced Oil Recovery. Recent Adv Petrochem Sci. ; 1(5): DOI: /RAPSCI Recent dances in etrocemical Science the effect of certain parameters on the anionic surfactantFile Size: KB.

section, the major forces involved in surfactant adsorption are discussed. Driving forces for surfactant adsorption For each surfactant–solid system, several of the above terms can be operative depending on the solid and the surfactant type, surfactant concentration, electrolyte, pH, temperature, etc.

Electrostatic interactions. The dynamics of surfactant adsorption is of great importance for practical applications such as in foaming, emulsifying or coating processes, where bubbles or drops are rapidly generated and need to be stabilized.

The dynamics of adsorption depend on the diffusion coefficient of the surfactant. As the interface is created, the adsorption is. The surfactant molecules in adsorption monolayers or lamellar bilayers are involved in a thermally exited motion, which brings about the appearance of fluctuation capillary waves.

The latter also cause a steric interaction (though a short range one) when two thermally. Adsorption of a surfactant at a solid-liquid interface can be good or bad.

When you want the surfactant to modify the properties of the interface, as you do in wetting applications, you want the surfactant to adsorb. In dispersions, surfactant adsorption is used to control the interaction between solid particles.

Polyelectrolytes are an important class of polymeric materials and are increasingly used in complex industrial formulations. A core use of these materials is in mixtures with surfactants, where a combination of hydrophobic and electrostatic interactions drives unique solution behavior and structure formation.

In this review, we apply a molecular level perspective to the broad literature on Cited by: The interaction of globular proteins with silica nanoparticles is dominated by electrostatic interactions and can be controlled by pH and ionic strength, while the bridging of nanoparticles by adsorbed protein molecules leads to large-scale hybrid aggregates of protein with the nanoparticles.

Surfactant Adsorption and Aggregate Structure at Brand: Springer International Publishing.Dynamics of Surfactant Self-Assemblies book. Micelles, Microemulsions, Vesicles and Lyotropic Phases C.

Mechanism of Adsorption. 1. The Electrostatic Concentration Span. 2. The Electrostatic and Hydrophobic strides have been made in understanding surfactant adsorption kinetics, and in this area development and.