Deryaguin surface forces

Deryaguin, B. V. (1987). Modem stale of the investigation of long-range surface forces. Langmuir 3, 601-606. 

Deryaguin BV, Churaev NV, Muller VM (1987) Surface forces. Consultants Bureau, Plenum Press, New York... 

No two surfaces are absolutely identical and there will be some contact electrification. The electrostatic theory considers the two surfaces to be bonded as the two plates of an electrostatic condenser, and is due to Deryaguin [30]. According to this theory adhesion occurs due to the electrostatic forces formed by interaction between the substrates. This theory explains the pressure dependence of tack/autohesion very well but it does not explain why raw and compounded rubbers lose most tack/autohesion as they are cured and brought into molecular contact under pressure. Further this theory is also not successful in explaining the time and temperature dependence of the tack/autohesion. By using potential contrast scanning electron microscopy the existence of an electric double layer at the polymer interface has been demonstrated [31]. 

In 1934, Deryaguin [40] considered the force of adhesion F in terms of the free energy of separation of two surfaces [G(Hco) — G(ho)] from a distance ho to infinite separation (boo). For the simple case of parallel plates. 

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