Who can tell me these two conceptions

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SUMMARY

The discussion centers on two critical concepts in colloid science: "disjoining pressure" and the "Hamaker function." The Hamaker function is explained through Hamaker's equation, which connects the instantaneous yield rate to the electric field, with references provided to relevant papers. Disjoining pressure is discussed in relation to Lifshitz theory and its applications in nonaqueous films. Key resources include specific academic papers that detail these concepts and their mathematical formulations.

PREREQUISITES
  • Understanding of colloid science principles
  • Familiarity with Hamaker's equation and constants
  • Knowledge of Lifshitz theory
  • Basic grasp of electrophoretic deposition (EPD)
NEXT STEPS
  • Read "Electrophoretic Deposition" to understand the application of Hamaker's equation
  • Explore Lifshitz theory in detail through relevant academic literature
  • Investigate the calculation of disjoining pressure isotherms for nonaqueous films
  • Study the relationship between van der Waals interactions and surface free energies
USEFUL FOR

Researchers, physicists, and engineers in the fields of colloid science, materials science, and surface chemistry who are looking to deepen their understanding of disjoining pressure and the Hamaker function.

Silicon
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What is "the disjoining pressure" and What is "the Hamaker function".
 
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Where did you read about these concepts ?
Can you give a reference to a text where they appeared ?

marlon
 
This paper might help to explain the Hamaker function (and Hamaker equation, Hamaker constants).
http://colloids.mse.uiuc.edu/research/acers_article.pdf

The process of EPD is described by Hamaker's equation, which relates the instantaneous yield rate with the electric field.
http://www.answers.com/topic/electrophoretic-deposition

As for disjoining pressure - see "http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JAPIAU000098000012124906000001&idtype=cvips&gifs=yes "

Also see - Lifsh!tz theory (where ! = i, in order to avoid auto-censor :rolleyes:)

van der Waals Interaction, Surface Free Energies, and Contact Angles: Dispersive Polymers and Liquids
http://www.ms.unimelb.edu.au/~dyc/pdfs/115.pdf

which mentions Lifsh!tz theory and Hamaker equation and constants.

See also - On the calculation of disjoining pressure isotherms for nonaqueous films.
http://www.ncbi.nlm.nih.gov/entrez/...ve&db=PubMed&list_uids=14697710&dopt=Abstract
 
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