Effect of electric field on coalescence of an oil-in-water emulsion stabilized by surfactant: a molecular dynamics study

Wang, Yudou; Li, Shiyan; Zhang, Yuanwu; Zhang, Zhenlei; Yuan, Shundong; Wang, Diansheng

doi:10.1039/d2ra04731d

RSC Adv.

2022

DOI: 10.1039/d2ra04731d

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Effect of electric field on coalescence of an oil-in-water emulsion stabilized by surfactant: a molecular dynamics study

Yudou Wang

Shiyan Li

Yuanwu Zhang

et al.

Abstract: The microscopic mechanisms of electrocoalescence of O/W emulsions stabilized by surfactant were analyzed from the electric dipole moment of the surfactant, the interaction between surfactant and oil molecules and the deformation of the surfactant.

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Cited by 5 publications

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Durable Nano‐Flower Structured Foam Coupled with Electrically‐Driven in Situ Aeration Enable High‐Flux Oil/Water Emulsion Separation with Dynamic Antifouling Ability

Lu,

Chen,

Lin

et al. 2024

Small

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The conventional membranes used for separating oil/water emulsions are typically limited by the properties of the membrane materials and the impact of membrane fouling, making continuous long‐term usage unachievable. In this study, a filtering electrode with synchronous self‐cleaning functionality is devised, exhibiting notable antifouling ability and an extended operational lifespan, suitable for the continuous separation of oil/water emulsions. Compared with the original Ti foam, the in situ growth of NiTi‐LDH (Layered double hydroxide) nano‐flowers endows the modified Ti foam (NiTi‐LDH/TF) with exceptional superhydrophilicity and underwater superoleophobicity. Driven by gravity, a rejection rate of over 99% is achieved for various emulsions containing oil content ranging from 1% to 50%, as well as oil/seawater emulsions. The flux recovery rate exceeds 90% after one hundred cycles and a 4‐h filtration period. The enhanced separation performance is realized through the “gas bridge” effect during in situ aeration and electrochemical anodic oxidation. The internal aeration within the membrane pores contributes to the removal of oil foulants. This study underscores the potential of coupling foam metal filtration materials with electrochemical technology, providing a paradigm for the exploration of novel oil/water separation membranes.

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Durable Nano‐Flower Structured Foam Coupled with Electrically‐Driven in Situ Aeration Enable High‐Flux Oil/Water Emulsion Separation with Dynamic Antifouling Ability

Lu,

Chen,

Lin

et al. 2024

Small

View full text Add to dashboard Cite

show abstract

Molecular dynamics promotes study of droplet electrocoalescence: A mini-review

Huang,

Chen

et al. 2024

Journal of Electrostatics

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Microscopic stabilization mechanism of nanoparticle-laden droplets under external electric fields: A molecular dynamics study

Wang

et al. 2023

International Journal of Heat and Mass Transfer

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Effect of electric field on coalescence of an oil-in-water emulsion stabilized by surfactant: a molecular dynamics study

Abstract: The microscopic mechanisms of electrocoalescence of O/W emulsions stabilized by surfactant were analyzed from the electric dipole moment of the surfactant, the interaction between surfactant and oil molecules and the deformation of the surfactant.

Cited by 5 publications

References 51 publications

Durable Nano‐Flower Structured Foam Coupled with Electrically‐Driven in Situ Aeration Enable High‐Flux Oil/Water Emulsion Separation with Dynamic Antifouling Ability

Durable Nano‐Flower Structured Foam Coupled with Electrically‐Driven in Situ Aeration Enable High‐Flux Oil/Water Emulsion Separation with Dynamic Antifouling Ability

Molecular dynamics promotes study of droplet electrocoalescence: A mini-review

Microscopic stabilization mechanism of nanoparticle-laden droplets under external electric fields: A molecular dynamics study

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