Introduction to Colloid and Surface ChemistryThe colloidal state; Kinetic properties; Optical properties; Liquid-gas and liquid- liquid interfaces; The solid-gas interface; Charged interfaces; Colloid stability; Rheology; Emulsions and foams. |
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Page 117
... the Dupré equation ( 4.20 ) ( i.e. WS / LYS / A + YL / A - YS / L ) WS / L = YL / A ( 1 + COS 0 ) ( 6.1 ) which is known as Young's equation . Therefore , zero 117 Wor باد THE SOLID-LIQUID INTERFACE Contact Angles and Wetting.
... the Dupré equation ( 4.20 ) ( i.e. WS / LYS / A + YL / A - YS / L ) WS / L = YL / A ( 1 + COS 0 ) ( 6.1 ) which is known as Young's equation . Therefore , zero 117 Wor باد THE SOLID-LIQUID INTERFACE Contact Angles and Wetting.
Page 118
... wetted by the liquid if the 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 ...
... wetted by the liquid if the 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 ...
Page 120
... Wetting agents Surface - active materials are used as wetting 120 THE SOLID - LIQUID INTERFACE.
... Wetting agents Surface - active materials are used as wetting 120 THE SOLID - LIQUID INTERFACE.
Contents
THE COLLOIDAL STATE | 1 |
KINETIC PROPERTIES | 16 |
OPTICAL PROPERTIES | 47 |
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adsorbed adsorption adsorption isotherm agents behaviour calculated capillary cell charge number charged surface chemisorption cm³ coefficient colloidal condensation constant contact angle counter-ions curve decrease depends detergent diffusion dispersion medium distance droplets effect electric double layer electric field electro-osmosis electrode electrokinetic electrolyte electrolyte concentration electrophoretic mobility emulsifying emulsion equation equilibrium example experimental fatty acids Figure flocculation flocculation concentration flow foam forces increase interaction interface intrinsic viscosity ions isotherms Langmuir Langmuir equation light scattered liquid lyophobic material measurements method micelles mol dm-3 molecules monolayer monomolecular nitrogen O/W emulsions phase physical adsorption polymer polymerisation pore porous potential energy protein radius ratio relative molecular mass result sample sedimentation shear silver iodide soaps sodium solid surface solvation solvent stabilising stability Stern layer streaming potential surface conductance surface tension surface-active surfactant temperature theory V/Vm vapour velocity viscoelastic viscosity volume Waals attraction wetting zeta potential