What is the structural component of disjoining pressure?

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SUMMARY

The discussion centers on the components of disjoining pressure, specifically identifying three key components: the dispersion component (Van der Waals), the electrostatic component, and the structural component. While established formulations exist for the dispersion and electrostatic components, no explicit equations for the structural component are available. Participants emphasize that structural effects on physical properties do not conform to standard equations, indicating a complexity that requires deeper investigation.

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  • Understanding of disjoining pressure and its components
  • Familiarity with Van der Waals forces
  • Knowledge of electrostatic interactions in physical chemistry
  • Basic grasp of molecular area approximations
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Yinxiao Li
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It is widely believed that there are three components of disjoining pressure: the dispersion component (Van der Waals), the electrostatic component and the structural component. For the first two, there are some accepted formulations for calculation. However, I cannot find any equations for the structural components. Is there any papers that give an explicit equation?
Thanks!
 
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Structural effects on physical properties aren't regular enough to be summed up in any sort of cookbook equation, sorry. If you read carefully, you'll find the other two components have a "molecular area" approximation built into them.
 

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