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Hansen Solubility Parameters for Directly Dealing with Surface and Interfacial Phenomena.

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This study introduces a new equation to estimate surface and interfacial tension using Hansen solubility parameters (HSP). This method successfully predicts polymer wettability, unifying bulk and surface properties for broader applications.

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Polymer Science

Background:

  • Hansen solubility parameters (HSP) traditionally describe bulk properties of polymers and solvents.
  • Integrating surface and interfacial phenomena into the HSP framework is crucial for comprehensive material characterization.
  • Existing methods lack a unified approach to connect bulk properties with surface energy and tension.

Purpose of the Study:

  • To develop a novel equation for estimating surface tension, surface energy, and interfacial tension within the HSP framework.
  • To bridge the gap between bulk material properties and surface/interfacial behaviors.
  • To expand the applicability of the extensive HSP database to surface-related phenomena.

Main Methods:

  • Proposed a new equation to calculate surface and interfacial tension/energy based on bulk HSPs.
  • Estimated contact angles of probe liquids on polymers using the developed equation.
  • Compared estimated contact angles with experimentally measured values obtained via the sessile drop method.
  • Validated the equation's predictive power across a range of liquid surface tensions, solid surface energies, and interfacial tensions.

Main Results:

  • The proposed equation demonstrated sufficient correlation for practical wettability prediction.
  • Good agreement was observed between estimated and measured contact angles.
  • The correlations confirmed the equation's predictive accuracy for various surface and interfacial tension values.
  • Successfully unified surface/interfacial properties with bulk HSPs, enabling property estimation in both directions.

Conclusions:

  • The modified HSP framework effectively integrates surface and interfacial phenomena.
  • Surface properties can now be reliably estimated from bulk properties, and vice versa.
  • The HSP database's utility is significantly expanded to include surface and interfacial applications.
  • This approach facilitates the understanding and design of complex multi-component and multi-phase systems.