scholarly journals Self-Consistent Mean Field Calculations of Polyelectrolyte-Surfactant Mixtures in Solution and upon Adsorption onto Negatively Charged Surfaces

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 624 ◽  
Author(s):  
Eduardo Guzmán ◽  
Laura Fernández-Peña ◽  
Gustavo S. Luengo ◽  
Ana María Rubio ◽  
Antonio Rey ◽  
...  
Keyword(s):  
Self Assembly ◽  
Quantitative Description ◽  
Mean Field ◽  
Chemical Behavior ◽  
Surfactant Mixtures ◽  
Charged Surfaces ◽  
Physico Chemical ◽  
Self Consistent ◽  
Polymer Surfactant ◽  
Scf Calculations

Self-Consistent Mean-Field Calculations (SCF) have provided a semi-quantitative description of the physico-chemical behavior of six different polyelectrolyte-surfactant mixtures. The SCF calculations performed showed that both the formation of polymer-surfactant in bulk and the adsorption of the formed complexes onto negatively-charged surfaces are strongly affected by the specific nature of the considered systems, with the polymer-surfactant interactions playing a central role in the self-assembly of the complexes that, in turn, affects their adsorption onto interfaces and surfaces. This work evidences that SCF calculations are a valuable tool for deepening on the understanding of the complex physico-chemical behavior of polyelectrolyte-surfactant mixtures. However, it is worth noting that the framework obtained on the basis of an SCF approach considered an equilibrium situation which may, in some cases, be far from the real situation appearing in polyelectrolyte-surfactant systems.

Self-Consistent Field Modeling of Adsorption from Polymer/Surfactant Mixtures

Langmuir ◽  
2008 ◽  
Vol 24 (13) ◽  
pp. 6712-6720 ◽  
Author(s):  
Bart R. Postmus ◽  
Frans A. M. Leermakers ◽  
Martien A. Cohen Stuart
Keyword(s):  
Surfactant Mixtures ◽  
Field Modeling ◽  
Consistent Field ◽  
Self Consistent ◽  
Self Consistent Field ◽  
Modeling Of Adsorption ◽  
Polymer Surfactant

scholarly journals Adsorption of Mixtures of a Pegylated Lipid with Anionic and Zwitterionic Surfactants at Solid/Liquid

2020 ◽  
Vol 4 (4) ◽  
pp. 47
Author(s):  
Sara Llamas ◽  
Eduardo Guzmán ◽  
Francisco Ortega ◽  
Ramón G. Rubio
Keyword(s):  
Hydrophobic Interactions ◽  
Deposition Process ◽  
Surfactant Mixtures ◽  
Zwitterionic Surfactants ◽  
Charged Surfaces ◽  
Surfactant Aggregates ◽  
Ternary Polymer ◽  
Solid Liquid ◽  
Polymer Surfactant ◽  
The Impact

This work explores the association of a pegylated lipid (DSPE-PEG) with different anionic and zwitterionic surfactants (pseudo-binary and pseudo-ternary polymer+ surfactant mixtures), and the adsorption of the polymer + surfactant aggregates onto negatively charged surfaces, with a surface charge density similar to that existing on the damaged hair epicuticle. Dynamic light scattering and zeta potential measurements shows that, in solution, the polymer + surfactant association results from an intricate balance between electrostatic and hydrophobic interactions, which leads to the formation of at least two different types of micellar-like polymer + surfactant aggregates. The structure and physicochemical properties of such aggregates were found strongly dependent on the specific nature and concentration of the surfactant. The adsorption of the polymer + surfactant aggregates onto negatively charged surface was studied using a set of surface-sensitive techniques (quartz crystal microbalance with dissipation monitoring, ellipsometry and Atomic Force Microscopy), which allows obtaining information about the adsorbed amount, the water content of the layers and the topography of the obtained films. Ion-dipole interactions between the negative charges of the surface and the oxyethylene groups of the polymer + surfactant aggregates appear as the main driving force of the deposition process. This is strongly dependent on the surfactant nature and its concentration, with the impact of the latter on the adsorption being especially critical when anionic surfactant are incorporated within the aggregates. This study opens important perspectives for modulating the deposition of a poorly interacting polymer onto negatively charged surfaces, which can impact in the fabrication on different aspects with technological and industrial interest.

Self-assembly of ABC dendrimer by real-space self-consistent mean field theory in a two-dimensional space

Soft Matter ◽  
2011 ◽  
Vol 7 (21) ◽  
pp. 10076 ◽  
Author(s):  
Bo Lin ◽  
Hongdong Zhang ◽  
Ping Tang ◽  
Feng Qiu ◽  
Yuliang Yang
Keyword(s):  
Field Theory ◽  
Self Assembly ◽  
Dimensional Space ◽  
Mean Field Theory ◽  
Mean Field ◽  
Real Space ◽  
Two Dimensional ◽  
Self Consistent

Copolymer Micelles with Polyelectrolyte Shell in Aqueous Media. A Mean-Field Study

2006 ◽  
Vol 71 (5) ◽  
pp. 756-768 ◽  
Author(s):  
Karel Jelínek ◽  
Filip Uhlík ◽  
Zuzana Limpouchová ◽  
Pavel Matějíček ◽  
Karel Procházka
Keyword(s):  
Aqueous Media ◽  
Excitation Energy Transfer ◽  
Mean Field ◽  
Hydrophobically Modified ◽  
Small Influence ◽  
Covalently Bonded ◽  
Self Consistent Field ◽  
Copolymer Micelles ◽  
And Behavior ◽  
Scf Calculations

The multimolecular micelles formed by polystyrene-block-poly(methacrylic acid) (PS-PMA) copolymer and by hydrophobically modified PS-PMA copolymer with naphthalene and anthracene (PS-N-PMA-A) were studied by self-consistent field (SCF) calculations in aqueous media. The labeling with covalently bonded naphthalene between PS and PMA blocks and with anthracene at the free end of PMA blocks, which is suitable for experimental nonradiative excitation energy transfer (NRET) studies of PS-N-PMA-A micelles, modifies the structure of micellar shell. The study was aimed at understanding structure and behavior of micelles at different pH and ionic strength. The results show that the presence of hydrophobic tags has only a small influence on the overall structure of micelles but it strongly affects the distribution of PMA free ends. The hydrophobic labels (anthracenes) try to return into the shell and their certain fraction is localized close to the core/shell interface, which causes a fairly high NRET efficiency. The calculated and experimentally measured NRET efficiency were compared; their trends are reasonable at the semiquantitative level.

OPTICAL TRANSITIONS IN A PARABOLIC GaAs/Ga1-xAlxAs SUPERLATTICES

2001 ◽  
Vol 08 (03n04) ◽  
pp. 321-325
Author(s):  
ŞAKIR ERKOÇ ◽  
HATICE KÖKTEN
Keyword(s):  
Transition Matrix ◽  
Optical Transition ◽  
Matrix Elements ◽  
Electron States ◽  
Parabolic Potential ◽  
Consistent Field ◽  
Self Consistent ◽  
Self Consistent Field ◽  
Transition Matrix Elements ◽  
Scf Calculations

We have performed self-consistent field (SCF) calculations of the electronic structure of GaAs/Ga 1-x Al x As superlattices with parabolic potential profile within the effective mass theory. We have calculated the optical transition matrix elements involving transitions from the hole states to the electron states, and we have also computed the oscillator strength matrix elements for the transitions among the electron states.

Impact of the Degree of Ethoxylation of the Ethoxylated Polysorbate Nonionic Surfactant on the Surface Self-Assembly of Hydrophobin-Ethoxylated Polysorbate Surfactant Mixtures

Langmuir ◽  
2014 ◽  
Vol 30 (32) ◽  
pp. 9741-9751 ◽  
Author(s):  
Jeffrey Penfold ◽  
Robert K. Thomas ◽  
Peixun Li ◽  
Jordan T. Petkov ◽  
Ian Tucker ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Self Assembly ◽  
Surfactant Mixtures

scholarly journals Effect of Bjerrum pairs on electrostatic properties in an electrolyte solution near charged surfaces: A mean-field approach

2021 ◽  
Author(s):  
Jun-Sik Sin
Keyword(s):  
Electrolyte Solution ◽  
Size Effects ◽  
Mean Field ◽  
Finite Size ◽  
Ion Association ◽  
Finite Size Effects ◽  
Field Approach ◽  
Electrostatic Properties ◽  
Charged Surfaces ◽  
Orientational Ordering

In this paper, we investigate the consequences of ion association, coupled with the considerations of finite size effects and orientational ordering of Bjerrum pairs as well as ions and water...

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