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Mixtures of Acids03:27

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Mixtures of Acids: pH Calculation
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Morphology formation in binary mixtures upon gradual destabilisation.

Charley Schaefer1, Stefan Paquay, Tom C B McLeish

  • 1Department of Physics, University of York, Heslington, York, YO10 5DD, UK. charley.schaefer@york.ac.uk.

Soft Matter
|September 7, 2019
PubMed
Summary
This summary is machine-generated.

This study reveals a new mechanism for liquid-liquid phase separation, showing how pretransitional structuring influences morphology. Predictions align with simulations and experiments, offering insights into complex fluid dynamics.

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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Soft Matter Physics

Background:

  • Phenomenological mean-field theories commonly explain liquid-liquid phase separation.
  • These theories are limited when critical thermal fluctuations dominate, especially in slowly destabilized mixtures found in biology and materials science.

Purpose of the Study:

  • To propose a novel mechanism for pretransitional structuring in mixtures approaching the miscibility gap.
  • To predict scaling relations for morphology feature size as a function of quench rate.

Main Methods:

  • Kinetic Monte Carlo simulations
  • Molecular dynamics simulations
  • Comparison with experimental observations

Main Results:

  • A mechanism of pretransitional structuring was identified.
  • Predicted scaling relations quantitatively agree with simulation results.
  • The findings are consistent with existing experimental data.

Conclusions:

  • The proposed mechanism provides a more comprehensive understanding of liquid-liquid phase separation under critical fluctuation conditions.
  • The study highlights the impact of quench rate on emerging morphology.
  • Further research can explore the influence of non-conserved order parameters, hydrodynamics, and active transport.