Effect of selected monovalent salts on surfactant stabilized foams

Amani, Pouria; Karakashev, Stoyan I.; Grozev, Nikolay A.; Simeonova, Silviya; Miller, R.; Rudolph, Victor; Firouzi, Mahshid

doi:10.1016/j.cis.2021.102490

Cited by 39 publications

(17 citation statements)

References 133 publications

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“…The origin of that effect is unclear, but it demonstrates that both counterions and coions can affect the dilatational moduli at liquid interfaces with ionic surfactants [45]. Specific ion effects relevant for foaming were described in the literature [46]. In our case, both NaCl and GuaHCl show an almost equal effect on foaming properties of LAE-cCNC at the concentration of 5 mmol/L, despite different surface dilational viscoelastic properties.…”

Section: Surface Tensionmentioning

confidence: 51%

The Effect of Electrolytes and Urea on the Ethyl Lauroyl Arginate and Cellulose Nanocrystals Foam Stability

Czakaj¹,

Krzan²,

Warszyński³

2022

Applied Sciences

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Carboxylated cellulose nanocrystals (cCNC) are highly dispersible particles useful in many industries. In particular, they can be applied to form Pickering emulsions and foams for “green” applications in the cosmetics, pharmaceutical industry or food processing. We demonstrated that carboxylated cellulose nanocrystals enhance foamability and foam stability when mixed with cationic surfactant ethyl lauroyl arginate (LAE), having superior properties over sulfated cellulose nanocrystals (sCNC) concerning surfactant concentration range and foam volume. Mixtures of LAE and cCNC were characterized for their hydrodynamic diameter, zeta potential, surface tension and surface rheological properties. The influence of electrolytes, namely, sodium chloride, guanidine hydrochloride and sodium salicylate, and the addition of concentrated urea to LAE-cCNC mixtures on foamability and foam stability were investigated. Electrolytes in the concentration of 5 mM showed a moderate effect on foam stability. In contrast, spectacular foam collapse was detected after adding concentrated urea. The preliminary rheological data from the pendant drop oscillations revealed low elastic modulus upon urea addition and the loss modulus that increased with the frequency, which suggested a viscous interfacial layer.

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Section: Surface Tensionmentioning

confidence: 51%

The Effect of Electrolytes and Urea on the Ethyl Lauroyl Arginate and Cellulose Nanocrystals Foam Stability

Czakaj¹,

Krzan²,

Warszyński³

2022

Applied Sciences

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“…Salts affect the surface activity of the surfactant, thus altering the dilational rheology of the interface [23]. Despite the numerous studies available on the effect of salt type on various physicochemical and interfacial properties of the surfactant solutions, few systematic investigations have focused on the effect of the type of added electrolytes on the dilational interfacial rheology of surfactant solutions [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions

Amani

Firouzi

2022

Colloids and Interfaces

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This study presents the equilibrium surface tension (ST), critical micelle concentration (CMC) and the dilational viscoelasticity of sodium dodecylbenzene sulfonate (SDBS)-adsorbed layers in the presence of NaCl, KCl, LiCl, CaCl2 and MgCl2 at 0.001–0.1 M salt concentration. The ST and surface dilational viscoelasticity were determined using bubble-shape analysis technique. To capture the complete profile of dilational viscoelastic properties of SDBS-adsorbed layers, experiments were conducted within a wide range of SDBS concentrations at a fixed oscillating frequency of 0.01 Hz. Salts were found to lower the ST and induce micellar formation at all concentrations. However, the addition of salts increased dilational viscoelastic modulus only at a certain range of SDBS concentration (below 0.01–0.02 mM SDBS). Above this concentration range, salts decreased dilational viscoelasticity due to the domination of the induced molecular exchange dampening the ST gradient. The dilational viscoelasticity of the salts of interest were in the order CaCl2 > MgCl2 > KCl > NaCl > LiCl. The charge density of ions was found as the corresponding factor for the higher impact of divalent ions compared to monovalent ions, while the impact of monovalent ions was assigned to the degree of matching in water affinities, and thereby the tendency for ion-pairing between SDBS head groups and monovalent ions.

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“…The presence of salts has an impact on the behavior of surfactants. The ions of salts can affect the surfactant solubility, 19−21 effects, 22 the IFT between oil/water, 23 the foam stability, 24 and the WA ability of the surfactant. 25 High salinity is a challenge in EOR because of the stability issue and performance loss of chemicals under harsh conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of salts has an impact on the behavior of surfactants. The ions of salts can affect the surfactant solubility, − the critical micelle concentration (CMC) micellization behavior of a catanionic surfactant with high solubility mismatch: composition, temperature, and salt effects, the IFT between oil/water, the foam stability, and the WA ability of the surfactant . High salinity is a challenge in EOR because of the stability issue and performance loss of chemicals under harsh conditions.…”

Section: Introductionmentioning

confidence: 99%

Wettability Alteration on Carbonate Rock by the Mixture of the Gemini Surfactant and Chelating Agent

et al. 2022

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Gemini surfactants are novel surfactants that show unique properties, including low critical micelle concentrations, good water solubility, and outstanding performance in interfacial tension reduction. A previous study focusing on a group of locally synthesized cationic gemini surfactants found promising wettability alteration performance, which indicates the possible application in carbonate reservoirs that are naturally fractured and oil-wet. However, the tested surfactants seemed not to be efficient in high-salinity conditions. Chelating agents are used to reduce salinity by capturing the metal ions, helping maintain the performance of the selected enhanced oil recovery materials. In this study, wettability alteration by the locally synthesized ethoxylated quaternary ammonium gemini surfactant (GS8, with eight carbon atoms in the spacer group) alone and by the mixture between GS8 and a commonly used chelating agent [diethylenetriaminepentaacetic acid (DTPA)] was assessed by contact angle measurements. Results show that GS8 can modify strongly oil-wet Indiana limestone to intermediate-wet when dissolved in deionized water. Adding salts impairs the ability of the surfactant in altering wettability. The negative effect decreases in the sequence: CaCl2 > Na2SO4 > NaCl ≈ NaHCO3 ≈ MgCl2. The addition of DTPA improved the ability of the surfactant to alter the wettability in the presence of salts. A mixture of DTPA and GS8 showed better performance compared to GS8 and DTPA alone. These results suggested that, for high-salinity reservoirs, adding a chelating agent in combination with a cationic gemini surfactant could improve the wettability alteration.

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Effect of selected monovalent salts on surfactant stabilized foams

Cited by 39 publications

References 133 publications

The Effect of Electrolytes and Urea on the Ethyl Lauroyl Arginate and Cellulose Nanocrystals Foam Stability

The Effect of Electrolytes and Urea on the Ethyl Lauroyl Arginate and Cellulose Nanocrystals Foam Stability

Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions

Wettability Alteration on Carbonate Rock by the Mixture of the Gemini Surfactant and Chelating Agent

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