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Related Concept Videos

Two Components: Liquid–Liquid Systems01:27

Two Components: Liquid–Liquid Systems

119
A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...
119

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Liquid-liquid encapsulation with a constrained interfacial layer.

Sirshendu Misra1, Akash Chowdhury1, Sushanta K Mitra1

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Summary
This summary is machine-generated.

A novel hydrophobic loop anchors denser liquids and controls spread in liquid-liquid encapsulation. This technique enhances shell-liquid utilization, reduces air inclusion, and improves process control for droplet encapsulation.

Keywords:
Air entrapmentDroplet impactHydrophobic confinementInterface dynamicsLiquid–liquid encapsulationWeber number

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Area of Science:

  • Materials Science
  • Fluid Dynamics
  • Chemical Engineering

Background:

  • Liquid-liquid encapsulation rapidly wraps core droplets with interfacial layers.
  • Conventional methods are limited by shell liquid density and uncontrolled lateral spreading.

Purpose of the Study:

  • To introduce a hydrophobic loop to overcome density limitations and control spreading in liquid-liquid encapsulation.
  • To enable the use of denser shell-forming liquids and improve film thickness and process control.

Main Methods:

  • Experiments utilized hydrophobic loops on aqueous baths with silicone oils and dibutyl phthalate as shell liquids.
  • High-speed imaging captured droplet impact dynamics and characterized lens formation.
  • Regime maps were constructed to identify operable volume windows for different loop dimensions.

Main Results:

  • The hydrophobic loop successfully confined denser interfacial liquids, forming thicker lenses.
  • Confinement shifted the trapping-to-penetration boundary and reduced air entrapment.
  • Operable volume windows were identified, and enhanced shell-liquid utilization was observed.

Conclusions:

  • Hydrophobic loops significantly enhance liquid-liquid encapsulation by enabling denser liquids and controlling spread.
  • The technique improves process control, reduces air inclusion, and broadens the versatility of encapsulation.