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Updated: Dec 8, 2025
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The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
Published on: September 30, 2014
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Viscoelastic liquid bridge breakup and liquid transfer between two surfaces.
H Chen1, A Ponce-Torres2, J M Montanero2
1Department of Mechanical Engineering, York University, Toronto, ON M3J 1P3, Canada.
Journal of Colloid and Interface Science
|September 21, 2020
Summary
Poly(acrylic acid) solutions exhibit unique liquid bridge breakup behavior. Above a threshold concentration, the liquid fully retracts to one surface before breaking, unlike Newtonian liquids.
Area of Science:
- Fluid dynamics
- Polymer science
- Surface science
Background:
- Liquid bridges are crucial in various industrial processes.
- Understanding their breakup dynamics is key to controlling fluid behavior.
- Polymer solutions can exhibit complex rheological properties affecting breakup.
Purpose of the Study:
- To investigate the breakup of Poly(acrylic acid) liquid bridges.
- To analyze the role of polymer concentration and surface wetting properties.
- To elucidate the mechanisms governing liquid bridge retraction and capillary breakup.
Main Methods:
- Experimental study of liquid bridges formed by Poly(acrylic acid) solutions.
- Varying polymer concentrations, liquid volumes, and stretching speeds.
- Observing contact line dynamics and liquid bridge neck thinning.
Main Results:
- At polymer concentrations above ~30 ppm, contact lines fully retract before capillary breakup.
- The liquid bridge entirely remains attached to one surface post-separation.
- This phenomenon differs significantly from Newtonian liquids and pinned contact line systems.
- Gravity influences retraction asymmetry when surface wetting is uniform.
Conclusions:
- Polymer solutions like Poly(acrylic acid) display distinct liquid bridge breakup modes.
- The interplay of extensional thickening and shear thinning governs retraction and breakup.
- Surface wetting properties and gravity are critical factors in determining the final liquid distribution.
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