Introduction to Colloid and Surface Chemistry |
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Page 26
... flow of molecules or particles across an area A in a colloidal solution where the concentration is c and the concentration gradient is dc / dx . The rate of flow is cA ( dx / dt ) due to sedimentation , and , from Fick's first law , DA ...
... flow of molecules or particles across an area A in a colloidal solution where the concentration is c and the concentration gradient is dc / dx . The rate of flow is cA ( dx / dt ) due to sedimentation , and , from Fick's first law , DA ...
Page 154
... flow methods - The most frequently employed method for measuring viscosities is based on flow through a capillary tube . The pressure under which the liquid flows furnishes the shearing stress . The relative viscosities of two liquids ...
... flow methods - The most frequently employed method for measuring viscosities is based on flow through a capillary tube . The pressure under which the liquid flows furnishes the shearing stress . The relative viscosities of two liquids ...
Page 162
... FLOW Steady - State Phenomena 1. Pseudoplasticity - Pseudoplastic behaviour is characterized by a gradual ( time - independent ) decrease in apparent viscosity with increasing rate of shear , and can arise from a number of causes . If ...
... FLOW Steady - State Phenomena 1. Pseudoplasticity - Pseudoplastic behaviour is characterized by a gradual ( time - independent ) decrease in apparent viscosity with increasing rate of shear , and can arise from a number of causes . If ...
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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