The Effect of Salt on the Interactions Between Droplets in Water-in-Oil Microemulsions

Jiang, Qing; Fan, Dashuang; Liu, Doudou; Wang, Xue; Chen, Zhiyun

doi:10.1007/s10953-020-00974-4

Cited by 7 publications

(8 citation statements)

References 47 publications

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“…In microemulsion systems, where ionic low-molecular-weight chemicals are employed, electrostatic repulsive interactions exist among the ionic head groups as the dominant stabilizing force. , The presence of polymers, high-molecular-weight surfactants, long-chain or tail compounds, steric stabilization, and hydrophobic effects contribute to microemulsion stability . Low-molecular-weight, non-ionic species-based microemulsions are associated with van der Waals forces, which improve stabilization . Thomas and Ali observed that the temperature and pressure conditions of the reservoir affect the oil–water IFT and, consequently, the microemulsion stability.…”

Section: Key Aspects Of Microemulsion-assisted Conformance Control Te...mentioning

confidence: 99%

Review on Microemulsions for Conformance Improvement Technology: Fundamentals, Design Considerations, and Perspectives

et al. 2023

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The area of conformance improvement technology (CIT) encompasses the application of a myriad range of conventional fluids, including polymers, gels, foams, polymer-enhanced gels and foams, bacteria, and emulsions. However, these routes show operational limitations in terms of chemical degradation, thermal degradation, formation damage, susceptibility to high salinity, and segregation within pore spaces. To mitigate these problems, it is necessary to employ conformance agents that can be effectively tuned for a wide variety of reservoir conditions. Microemulsions are a promising class of fluids that exhibit thermodynamic stability, robust structure, and tunable properties. The concept of this research is to inject the optimal (correct) dosage of surfactants, which form micelles with in situ hydrocarbons to form microemulsions. Microemulsions are characterized by direct and reverse micelles, which contribute to their intermolecular interactions responsible for fluid stability and propagation under dynamic shear conditions. Design and reservoir considerations must comprise of a number of factors, namely, salinity, pH, temperature, slug concentration, and fluid activation/placement. An optimal microemulsion can be identified by understanding the flow mechanisms while accounting for mobility control, rock permeability and heterogeneity, thief zone permeabilities, and the presence of anomalies. It has been established in this review that microemulsions help plug the high permeability pore throats via a combination of the “Jamin effect” and viscosity modification. By adoption of a proper workflow design, the reservoir may be tuned via the introduction of microemulsions to suit the needs of the industry. However, considerable research is still needed to validate the design aspects and application of microemulsions for conformance improvement.

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Section: Key Aspects Of Microemulsion-assisted Conformance Control Te...mentioning

confidence: 99%

Review on Microemulsions for Conformance Improvement Technology: Fundamentals, Design Considerations, and Perspectives

et al. 2023

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“…In the absence of salt, the ME droplet is observed to be 134.40 nm in diameter. The addition of salts increases the droplet size owing to droplet aggregation and salt ion hydration phenomena (Hamada et al, 2001;Jiang et al, 2020;Pal et al, 2019a). With increasing salinity, the total dissolved salts tend to attract water molecules to their immediate vicinity, thereby lowering the repulsive energy interactions among dispersed droplets (Brini et al, 2017;Jiang et al, 2020).…”

Section: Dynamic Light Scattering Studiesmentioning

confidence: 99%

“…The addition of salts increases the droplet size owing to droplet aggregation and salt ion hydration phenomena (Hamada et al, 2001;Jiang et al, 2020;Pal et al, 2019a). With increasing salinity, the total dissolved salts tend to attract water molecules to their immediate vicinity, thereby lowering the repulsive energy interactions among dispersed droplets (Brini et al, 2017;Jiang et al, 2020). This gradually increases the droplet diameter to values in the range of 138.93-211.86 nm in the case of ME formulations with 10,000-80,000 ppm TDS content.…”

Section: Dynamic Light Scattering Studiesmentioning

confidence: 99%

Technical Evaluation of Conformance Improvement Technology with Anionic Surfactant-Stabilized Microemulsions in Porous Media

Pal

Alzahid²,

AlSofi³

et al. 2022

SSRN Journal

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“…[3] Therefore, the development of relatively stable W/O microemulsions and W/O microemulsions products with more stable quality during transportation or storage is important . [4][5][6] In recent years, food-grade microemulsions have overcome low solubility and biology utilization rate, which has become the carrier of bioactive substances. Proteins and polysaccharides can be used as emulsifiers and stabilizers in food processing.…”

Section: Introductionmentioning

confidence: 99%

“…Short-and middle-chain alcohols, such as ethanol, glycerol, and n-butyl alcohol, are multi-selected as cosurfactants in microemulsions. [3,6,11,14] This study aimed to determine whether the stability of W/O blank microemulsions can be improved by incorporating the protein isolate of Desmodium intortum into the aqueous phase based on the protein-emulsifier interface interaction. The W/O microemulsion was introduced into the complete W/O blank microemulsion to prepare W/O microemulsions with different protein concentrations for proteins and emulsifiers to compete for adsorption.…”

Section: Introductionmentioning

confidence: 99%

Water-in-oil microemulsion: effect of Desmodium intortum protein isolate–emulsifier interaction, and its stability

Zhang

Liu

Yan

et al. 2021

International Journal of Food Properties

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Water-in-oil (W/O) microemulsions exhibit delivery matrix and exhibit poor lipid solubility. Therefore, increasing the stability of W/O microemulsions is necessary to broaden their applications. In our experiment, a protein microemulsion system was constructed and its stability was investigated. The effects of surfactants, co-surfactants, quality ratio of them (Km) and hydrophilic-lipophilic balance (HLB) values were determined by using the pseudoternary phase diagrams and the area of microemulsions (MEs) as the indexes. The results showed that MEs' stability was the best when the limonene was used as oil phase, Tween 20 + span 80 as the surfactant, and anhydrous alcohol as co-surfactant, if and only if HLB = 6.0 and Km = 3:1. Under this condition, the area of micro-emulsion was the largest, and the quality of microemulsion was better when the mass ratio of oil phase and emulsifier was 7:5.The protein microemulsion was a water-in-oil type, with a particle size of 1.41 ± 0.03 μm, containing 1127.37 ± 30.87 μg/g of proteins. Moreover, the temperature, light, and sample observation tests showed that the solution's protein retention rate was lower than those in the microemulsion. Low-concentration NaCl, less than 9% of glucose and maltose exerted no significant influence on the protein microemulsion stability.

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The Effect of Salt on the Interactions Between Droplets in Water-in-Oil Microemulsions

Cited by 7 publications

References 47 publications

Review on Microemulsions for Conformance Improvement Technology: Fundamentals, Design Considerations, and Perspectives

Review on Microemulsions for Conformance Improvement Technology: Fundamentals, Design Considerations, and Perspectives

Technical Evaluation of Conformance Improvement Technology with Anionic Surfactant-Stabilized Microemulsions in Porous Media

Water-in-oil microemulsion: effect of Desmodium intortum protein isolate–emulsifier interaction, and its stability

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