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Coupled Hydrodynamic and Surfactant Effects on Liquid Film Drainage Dynamics between Bubble and the Solid Surface
Bolong Zhang1,2,3, Danlong Li1,2,3, Xiaokang Yan1,2,3
1School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|November 25, 2025
Summary
This study reveals how fluid flow and surfactants impact bubble-particle attachment in industrial processes. Understanding these dynamics is key to optimizing mineral recovery and chemical reactions.
Area of Science:
- Fluid Dynamics
- Surface Chemistry
- Colloid Science
Background:
- Bubble-particle attachment is crucial for flotation and multiphase reactions.
- The interplay between fluid turbulence and solution chemistry in this process is not fully understood.
Purpose of the Study:
- To systematically investigate liquid film thinning dynamics between bubbles and solids in turbulent flow.
- To elucidate the roles of interfacial approach velocity and surfactant concentration on film drainage and bubble-particle attachment.
Main Methods:
- High-speed microinterferometry was employed to observe liquid film thinning.
- Kinetic analysis was used to study the coupled effects of hydrodynamics and surfactant adsorption.
Main Results:
- Increased interfacial approach velocity enhances hydrodynamic effects, leading to complex film deformation and drainage patterns.
- Surfactant adsorption significantly suppresses drainage, increasing film thickness and thinning time, especially at higher concentrations.
- Hydrophilic surfaces showed similar trends, and a coupled effect between velocity and surfactant adsorption was observed, influencing interfacial mobility.
Conclusions:
- Hydrodynamics and surfactant adsorption individually and collectively influence liquid film thinning.
- Findings provide theoretical insights for optimizing mineralization processes and improving bubble-solid attachment efficiency.
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