Non-DLVO, steric and fluctuation forces
Non-DLVO, steric and fluctuation forces
Non-DLVO, steric and fluctuation forces
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Solvation of Forces in Aqueous Systems:Attractive ‘Hydrophobic’ Forces• Attractive hydrophobic <strong>forces</strong>[AHF] can be judged frommeasurements of their interfacial energy with water γ i or fromthe contact angle of water on them(CH 15)W= −2γe −D/ λ0iin the range 0-10 nm, γ i = 10-50 mJm -2 , λ 0 = 1-2 nm• D < 10nm, AHF is insensitive or only weakly sensitive toelectrolyte ions <strong>and</strong> their conc.D > 10nm, AHF does depend on the intervening electrolyte, <strong>and</strong>that in dilute solutions, or solutions containing divalent ions, itcan continue to exceed the vdWs attraction out to separation of80nm.
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