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Divide, Conquer, and Stabilize: Engineering Strong Fluid-Fluid Interfaces.

Alexandra V Bayles1,2, Jan Vermant1

  • 1Department of Materials, ETH Zürich, Zürich, Switzerland 8093.

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|May 18, 2022
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Summary
This summary is machine-generated.

Controlling how surface-active molecules assemble at fluid interfaces is key to stabilizing multiphase materials. New processing strategies, beyond equilibrium adsorption, can engineer robust interfacial structures for enhanced material performance.

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Area of Science:

  • Materials Science
  • Colloid and Surface Science
  • Rheology

Background:

  • Multiphase materials rely on stable fluid-fluid interfaces for mechanical integrity.
  • Traditional methods for interfacial stabilization via adsorption are often equilibrium-limited.
  • Kinetically trapped interfacial structures offer alternative routes to desired rheological properties.

Purpose of the Study:

  • To explore strategies for engineering interfacial rheology beyond equilibrium adsorption.
  • To investigate the role of processing history in creating stable interfacial structures.
  • To understand how intrinsic properties and processing interact to control interface behavior.

Main Methods:

  • Review and contrast different processing histories for interfacial population.
  • Analysis of 'divide' (interface creation) and 'conquering' (interface population) strategies.
  • Consideration of intrinsic qualities of surface-active species and their assembly processes.

Main Results:

  • Processing history offers deterministic control over interfacial structure and rheology.
  • Kinetically trapped structures can achieve desirable viscoelasticity/viscoplasticity, even with sparse populations.
  • Designing both molecular properties and processing pathways is crucial for interfacial engineering.

Conclusions:

  • Tailoring processing history is a powerful, underutilized tool for stabilizing multiphase materials.
  • This approach can lead to improved material and energy efficiency.
  • Further research into the interplay of property, structure, and processing will unlock novel multiphase materials.