Introduction to Colloid and Surface Chemistry |
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Page 53
... contact angle is zero , owing to the uncertainty in measuring contact angles correctly . One can check for zero contact angle by allowing the meniscus to approach an equilibrium position in turn from above and below . With a finite contact ...
... contact angle is zero , owing to the uncertainty in measuring contact angles correctly . One can check for zero contact angle by allowing the meniscus to approach an equilibrium position in turn from above and below . With a finite contact ...
Page 92
... contact angle is zero and only partially wetted if the contact angle is finite . Complete non - wetting implies a contact angle of 180 ° , which is an unrealistic situation since it requires that either WS / L = 0 or YL / A = 00 . There ...
... contact angle is zero and only partially wetted if the contact angle is finite . Complete non - wetting implies a contact angle of 180 ° , which is an unrealistic situation since it requires that either WS / L = 0 or YL / A = 00 . There ...
Page 93
Duncan J. Shaw. contact angle for a sessile drop or bubble resting on or against a plane solid surface can be ... CONTACT ANGLES AND WETTING.
Duncan J. Shaw. contact angle for a sessile drop or bubble resting on or against a plane solid surface can be ... CONTACT ANGLES AND WETTING.
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acid adsorbed adsorption adsorption isotherm approximately aqueous behaviour Brownian calculated cell charged surface chemisorption cm-¹ cm³ coefficient colloidal dispersions colloidal particles colloidal systems constant contact angle counter-ions curve cylinder decreases deflocculated deformation depends detergent diffusion dispersion medium distance droplets effect electrical double layer electrode electrolyte emulsifying equation equilibrium example Figure film flocculation flocculation concentration flow hydrocarbon chains hydrophilic increase interaction interface intrinsic viscosity ionic ions isotherms light scattered material measured membrane method micelles mixed film molecular weight molecules monolayer monomolecular motion O/W emulsions orientated osmotic pressure physical adsorption plate polymer polymerization pores porous potential energy potential gradient protein ratio relative repulsive sample sedimentation shear soaps sodium solid surface soluble solution solvation solvent spherical particles stability Stern layer stress surface tension surface-active surfactant temperature theory thermal thixotropic valency vapour pressure velocity viscoelastic viscometer volume W/O emulsions Waals wetting zero zeta potential