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Measurement of the Rheology of Crude Oil in Equilibrium with CO2 at Reservoir Conditions
Published on: June 6, 2017
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The Effect of Particle Shell on Cooling Rates in Oil-in-Oil Magnetic Pickering Emulsions.
Rafał Bielas1, Arkadiusz Józefczak1
1Chair of Acoustics, Faculty of Physics, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 2, 61-614 Poznań, Poland.
Materials (Basel, Switzerland)
|October 29, 2020
Summary
Magnetic Pickering emulsions with stable particle shells exhibit slower cooling. This controlled heat transfer from magnetic droplets offers potential applications requiring delayed thermal release.
Area of Science:
- Materials Science
- Colloid and Surface Chemistry
- Nanotechnology
Background:
- Pickering emulsions, stabilized by particles, offer enhanced stability over traditional surfactant-stabilized emulsions.
- Magnetic heating of particle-stabilized emulsions generates heat via magnetic relaxation and hysteresis.
- The shell's integrity in magnetic Pickering emulsions may influence heat transfer dynamics.
Purpose of the Study:
- To investigate the influence of magnetic particle shell stability on heat transfer in oil-in-oil Pickering emulsions.
- To explore the potential of magnetic Pickering emulsions as materials with tunable thermal properties.
Main Methods:
- Fabrication of magnetic Pickering emulsions with packed particle layers and stable particle shells.
- Induction of shell stability changes using electric-field-induced droplet coalescence.
- Calorimetric measurements to analyze heating and cooling behavior under alternating magnetic fields.
Main Results:
- A stable particle shell significantly retards the cooling rate of magnetic Pickering emulsions.
- This effect is more pronounced at lower magnetic field intensities.
- The solidity of the particle shell directly impacts the rate of heat dissipation.
Conclusions:
- The stability of the magnetic particle shell is a critical factor in controlling heat transfer in Pickering emulsions.
- Magnetic Pickering emulsions can be engineered for applications requiring delayed heat transfer.
- This study highlights a novel approach to designing responsive thermal materials.
Keywords:
Pickering emulsioncalorimetric measurementscoalescencemagnetic fieldmagnetic heatingparticle-stabilized emulsionMore Related Videos
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