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Calculation Methods of Solution Chemical Potential and Application in Emulsion Microencapsulation.

Binkai Xu1, Xiangdong Liu2, Bo Zhou1

  • 1Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.

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Summary
This summary is machine-generated.

New biased sampling methods enhance chemical potential calculations for emulsion microencapsulation. These techniques improve accuracy and efficiency for various solution types, aiding solubility predictions.

Keywords:
MetadynamicsWidom insertionchemical potentialemulsion microencapsulationmolecular simulation

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Area of Science:

  • Computational Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Calculating chemical potential is crucial for understanding solutions in emulsion microencapsulation.
  • Traditional methods face challenges with complex emulsion systems.
  • Biased sampling offers potential improvements in accuracy and efficiency.

Purpose of the Study:

  • To review and categorize new biased sampling methods for chemical potential calculations in emulsion microencapsulation.
  • To guide the selection of appropriate methods based on solution properties.
  • To introduce an optimized volume detection bias method.

Main Methods:

  • Summary and analysis of biased Widom insertion sampling methods: volume detection bias, simulation ensemble bias, and particle insertion bias.
  • Application of an optimized volume detection bias for calculating chemical potential of water, argon, and fluorobenzene.
  • Utilizing Well-Tempered (WT)-Metadynamics for oil-polymer mixtures.
  • Employing particle insertion bias for macromolecule solutes.

Main Results:

  • Volume detection bias improves accuracy and efficiency for homogeneous aqueous phases.
  • Optimized volume detection bias successfully calculated chemical potentials for key solvents.
  • WT-Metadynamics is suitable for oil-polymer mixtures in microencapsulation.
  • Particle insertion bias enhances Widom insertion success rates for macromolecules.

Conclusions:

  • Biased sampling methods offer significant advantages for chemical potential calculations in emulsion systems.
  • The choice of method should be guided by the specific molecular properties of the solution.
  • This work provides a framework for selecting appropriate techniques to determine chemical potential, fugacity, and solubility.