Microscopic mechanisms of MgCl2 affecting anionic surfactant adsorption kinetics on the air water interface

Cao, Xuewen; Xia, Wenzhu; Zhang, Pan; Cao, Hengguang; Li, Xiang; Zhang, Xingyao

doi:10.1016/j.colsurfa.2022.129925

Cited by 7 publications

(6 citation statements)

References 57 publications

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“…For unsaturated interfaces, the addition of salt results in more vacancies on the interface. 57 Therefore, none of these systems need to consider micelle agglomeration and interfacial supersaturation. It should also be noted that due to the limitation of the simulation system, only the behaviors of surfactants and ions near the solution interface can be simulated, which cannot directly correspond to the real solution concentration.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous study, we found that the addition of salt increases the interfacial adsorption. For unsaturated interfaces, the addition of salt results in more vacancies on the interface . Therefore, none of these systems need to consider micelle agglomeration and interfacial supersaturation.…”

Section: Methodsmentioning

confidence: 99%

“…We have also studied the influence of salt on interfacial adsorption and found that the addition of MgCl 2 can accelerate the adsorption kinetics of SDS and can increase the adsorption amount. 46 There are also many studies on foam performance under the influence of salt. Obisesan et al 47 studied the effect of NaCl and CaCl 2 on the foam drainage performance formed by anionic surfactants.…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al found that sodium dodecyl benzenesulfonate (SDBS) under the influence of NaCl and CaCl 2 is more perpendicular to and more aggregated at the oil–water interface. We have also studied the influence of salt on interfacial adsorption and found that the addition of MgCl 2 can accelerate the adsorption kinetics of SDS and can increase the adsorption amount …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Cao,

Xia,

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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In the application of foams in the industrial field, there are often high requirements for foaming ability and stability, but this brings greater pressure for defoaming. This paper discusses the evolution kinetics of aqueous foams stabilized by the anionic surfactant sodium dodecyl sulfate (SDS) under the influence of MgCl 2 . It is found that MgCl 2 has a dual effect on the performance of SDS foam, which is shown by the enhanced foaming ability and significantly improved stability but rapid defoaming when drained to a certain film thickness. This phenomenon not only increases efficiency in industrial applications but also facilitates recycling and defoaming. To clarify the mechanism behind this interesting phenomenon, we discuss the influence of MgCl 2 on bubbles, adsorption, film strength, disjoining pressure, surface tension, and rheological properties. The results show that the addition of MgCl 2 can significantly reduce the surface tension and interfacial formation energy and increase the adsorption of surfactant, film strength, and bulk phase viscosity. The size of the generated foam becomes smaller and more uniform. These factors together led to the enhancement of the stability of foam with the thicker liquid film. However, the addition of MgCl 2 can also have some detrimental effects on stability. For example, faster adsorption kinetics and higher surface strength lead to a weakening of the membrane repair capacity. Most importantly, when the liquid film is very thin, the surface adsorbed by SDS has a strong specific adsorption for Mg 2+ , which causes interfacial adhesion directly, leading to the instability of the thin liquid film. This paper provides theoretical guidance on the use of magnesium salts as additives, offering new ideas for combining high foam application performance and low defoaming difficulty.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Cao,

Xia,

Zhao

et al. 2023

Ind. Eng. Chem. Res.

Self Cite

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“…They found that the ability of salt to reduce the CMC of the ST and SDBS solutions follows Ca 2+ > Mg 2+ >K + > Na + > Li + . Cao et al [31] studied the interfacial tension (IFT) characteristics of SDS solutions with different concentrations of MgCl 2 , as well as the adsorption behavior and interfacial features of SDS with and without MgCl 2 using molecular dynamics simulations. They found that the adsorption of surfactants involves mixed diffusion-kinetic-controlled adsorption.…”

Section: Introductionmentioning

confidence: 99%

Influence of Inorganic Salt Additives on the Surface Tension of Sodium Dodecylbenzene Sulfonate Solution

Zhu,

Liu,

Wang

et al. 2023

Processes

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In order to study the effect of inorganic salt additives on the surface tension of a sodium dodecylbenzene sulfonate (SDBS) solution, the surface tension of the mixed system of six common inorganic salt additives, NaCl, CaCl2, AlCl3, Na2SO4, Na2CO3, and NaHCO3, and SDBS was measured, and the effects of the inorganic salt types, surfactant concentrations and inorganic salt concentrations on the surface tension of the SDBS solution were studied. On this basis, three inorganic salts, NaCl, CaCl2 and Na2SO4, were selected, and their effects on the critical micelle concentration (CMC) of the SDBS solution were studied. The experimental results showed that different inorganic salts had different effects on the surface tension of the SDBS solution. The order of effect of the six inorganic salts on the surface tension of the SDBS solution was CaCl2 > NaCl > Na2SO4 > NaHCO3 > Na2CO3 > AlCl3; when the mass fraction of the SDBS solution is high, the influence of the inorganic salts on the surface tension of the SDBS solution is relatively small; with an increase in the concentration of the preferred inorganic salt additives, the surface tension of the SDBS solution decreases first, then tends to be stable, and then increases; a reduction in the critical micelle concentration by the three selected inorganic salt additives shows the trend of 0.7% NaCl > 0.5% CaCl2 > 0.5% Na2SO4.

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Influence mechanism of inorganic salts on coal permeability during foam fracturing

Huang

Yan

et al. 2023

Energy

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Microscopic mechanisms of MgCl2 affecting anionic surfactant adsorption kinetics on the air water interface

Cited by 7 publications

References 57 publications

Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Influence of Inorganic Salt Additives on the Surface Tension of Sodium Dodecylbenzene Sulfonate Solution

Influence mechanism of inorganic salts on coal permeability during foam fracturing

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Microscopic mechanisms of MgCl2 affecting anionic surfactant adsorption kinetics on the air water interface

Cited by 7 publications

References 57 publications

Study on the Dual Effects of MgCl2 on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Study on the Dual Effects of MgCl2 on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Influence of Inorganic Salt Additives on the Surface Tension of Sodium Dodecylbenzene Sulfonate Solution

Influence mechanism of inorganic salts on coal permeability during foam fracturing

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Product

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Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate