Introduction to Colloid and Surface Chemistry |
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Page 117
Duncan J. Shaw. 7 ELECTRICAL PROPERTIES THE ELECTRICAL DOUBLE LAYER Most substances acquire a surface electric charge by ionization and / or by the adsorption of ions when brought into contact with a polar ( e.g. aqueous ) medium , and ...
Duncan J. Shaw. 7 ELECTRICAL PROPERTIES THE ELECTRICAL DOUBLE LAYER Most substances acquire a surface electric charge by ionization and / or by the adsorption of ions when brought into contact with a polar ( e.g. aqueous ) medium , and ...
Page 118
... Double Layer In the absence of thermal motion , sufficient counter - ions would become firmly attached to the surface of a colloidal particle to neutralize its charge , but thermal agitation prevents the formation of such a compact ...
... Double Layer In the absence of thermal motion , sufficient counter - ions would become firmly attached to the surface of a colloidal particle to neutralize its charge , but thermal agitation prevents the formation of such a compact ...
Page 119
... electrical double layer ( often referred to as the Gouy - Chapman double layer ) , as illustrated in Figure 7.1 . An increase in the electrolyte concentration magnifies the above screening effect and so leads to a compacting of the diffuse ...
... electrical double layer ( often referred to as the Gouy - Chapman double layer ) , as illustrated in Figure 7.1 . An increase in the electrolyte concentration magnifies the above screening effect and so leads to a compacting of the diffuse ...
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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