Introduction to Colloid and Surface Chemistry |
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Page 58
... surface activity . Surface - active materials ( or surfactants ) consist of molecules containing both polar and non - polar parts ( amphiphilic ) . Surface activity is a dynamic phenomenon , since the final state of a surface or ...
... surface activity . Surface - active materials ( or surfactants ) consist of molecules containing both polar and non - polar parts ( amphiphilic ) . Surface activity is a dynamic phenomenon , since the final state of a surface or ...
Page 63
... surface . Several early investigators bubbled air through solutions of surface - active materials and collected the froth which was formed . The surface excess was calculated via an analysis of the collapsed froth and an estimation of the ...
... surface . Several early investigators bubbled air through solutions of surface - active materials and collected the froth which was formed . The surface excess was calculated via an analysis of the collapsed froth and an estimation of the ...
Page 64
... surface - active part of the molecule . Some common examples are given in Table 4.2 . Anionic Sodium stearate Sodium oleate Sodium dodecyl sulphate Table 4.2 Surface - active agents Sodium dodecyl benzene sulphonate Cationic Laurylamine ...
... surface - active part of the molecule . Some common examples are given in Table 4.2 . Anionic Sodium stearate Sodium oleate Sodium dodecyl sulphate Table 4.2 Surface - active agents Sodium dodecyl benzene sulphonate Cationic Laurylamine ...
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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