The impact of nonionic surfactant additives on the nonequilibrium association between oppositely charged polyelectrolytes and ionic surfactants

Soft Matter ◽  
2014 ◽  
Vol 10 (12) ◽  
pp. 1953 ◽  
Author(s):  
Edit Fegyver ◽  
Róbert Mészáros
Keyword(s):  
Nonionic Surfactant ◽  
Ionic Surfactants ◽  
The Impact ◽  
Oppositely Charged

A simple simulation model for complex coacervates

Soft Matter ◽  
2021 ◽  
Author(s):  
Sai Vineeth Bobbili ◽  
Scott Milner
Keyword(s):  
Phase Diagram ◽  
Aqueous Solution ◽  
Phase Separation ◽  
Simulation Model ◽  
Simple Simulation ◽  
The Impact ◽  
Oppositely Charged

When oppositely charged polyelectrolytes mix in an aqueous solution, associative phase separation gives rise to coacervates. Experiments reveal the phase diagram for such coacervates, and determine the impact of charge...

Self-organization of ionic surfactants controlled by oppositely charged polyelectrolytes

2003 ◽  
Vol 191 (1) ◽  
pp. 111-120 ◽  
Author(s):  
Victor A. Kabanov ◽  
Alexander B. Zezin ◽  
Victor A. Kasaikin ◽  
Julia A. Zakharova ◽  
Ekaterina A. Litmanovich ◽  
...  
Keyword(s):  
Self Organization ◽  
Ionic Surfactants ◽  
Oppositely Charged

Asphaltene Deposition and Removal in Flowlines and Mitigation by Effective Functional Molecules

SPE Journal ◽  
2020 ◽  
Vol 25 (02) ◽  
pp. 771-787 ◽  
Author(s):  
Taniya Kar ◽  
Khosrow Naderi ◽  
Abbas Firoozabadi
Keyword(s):  
Nonionic Surfactant ◽  
Sulfonic Acid ◽  
Ionic Surfactants ◽  
Appreciable Effect ◽  
Efficient Removal ◽  
Aromatic Solvent ◽  
Toluene Concentration ◽  
Low Concentrations ◽  
Asphaltene Deposition ◽  
Dodecylbenzene Sulfonic Acid

Summary Efficient removal of deposited asphaltenes on the surface of metallic flowlines by functional molecules is investigated by nonionic and ionic surfactants at low concentrations. Deposition removal by aromatic solvent toluene is measured as a reference. Water is often coproduced with crude oil and may affect deposition of asphaltenes and removal. In this study, we investigate the effect of water in both asphaltene deposition and removal by functional molecules. Two different crudes from different fields that give rise to serious asphaltene deposition are extensively investigated. For these two crudes, we find one ionic and one nonionic surfactant to be effective in deposition removal at 1 wt% concentration in the crude. This concentration is much lower than that of the commonly studied acidic dodecylbenzene sulfonic acid (DBSA) surfactant. Toluene concentration in the crude varies from 40 to 60 wt% for asphaltene deposition removal. Water delays deposition significantly. However, water does not have an appreciable effect on performance of functional molecules on removal of deposited asphaltenes.

scholarly journals Effect of ionic surfactants on the iridescent color in lamellar liquid crystalline phase of a nonionic surfactant

2007 ◽  
Vol 305 (2) ◽  
pp. 308-314 ◽  
Author(s):  
Xinjiang Chen ◽  
Hiroyuki Mayama ◽  
Goh Matsuo ◽  
Tsukasa Torimoto ◽  
Bunsho Ohtani ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Liquid Crystalline Phase ◽  
Ionic Surfactants

The Impact of Ionic Surfactants on the Crystallisation of Glycine Polymorphs

2021 ◽  
Author(s):  
Roger J. Davey ◽  
Richard J. Dowling ◽  
Aurora J. Cruz‐Cabeza
Keyword(s):  
Ionic Surfactants ◽  
The Impact

scholarly journals Surfactant-Modulation of the Cationic-Polymer-Induced Aggregation of Anionic Particulate Dispersions

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 287 ◽  
Author(s):  
Wasiu Abdullahi ◽  
Martin Crossman ◽  
Peter Charles Griffiths
Keyword(s):  
Nonionic Surfactant ◽  
Particle Surface ◽  
Particulate Material ◽  
Cationic Polymer ◽  
Charge Densities ◽  
Cationic Modification ◽  
Adsorbed Polymer ◽  
Induced Aggregation ◽  
Oppositely Charged ◽  
Modified Cellulose

Commodity formulations contain many chemically distinct components and their mutual interactions define the beneficial characteristics of the formulation. Mixing oppositely charged polymers and surfactants invariably induces macroscopic phase separation, to a degree dependent on the prevailing polymer and surface charge densities, and the interaction can be modulated by added ionic surfactants. Here, it is shown that a general universality exists between the charge present on a series of cationic-modified cellulose polymers—the charge being controlled either by the degree of cationic modification of the polymer itself or through the subsequent level of anionic surfactant binding—and its capacity to remove anionic colloidal material from solution, be that silica particles or polystyrene-butadiene lattices. Particulate material not removed from solution bears no adsorbed polymer, i.e., the particle surface is bare. Addition of nonionic surfactant does not negate this universality, implying that the nonionic surfactant is largely a spectator molecule or structure (micelle) in these systems, and that the dominant force is an electrostatic one.

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