Introduction to Colloid and Surface Chemistry |
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Page 55
... radius of the ring , and ẞ a correction factor . To ensure zero , and hence a constant contact angle , platinum rings carefully cleaned in strong acid or by flaming are used . It is essential that the ring should lie flat in a quiescent ...
... radius of the ring , and ẞ a correction factor . To ensure zero , and hence a constant contact angle , platinum rings carefully cleaned in strong acid or by flaming are used . It is essential that the ring should lie flat in a quiescent ...
Page 93
... radius r . The pressure required to prevent the liquid in question from entering the capillaries of this porous plug is measured , and the general equation for capillary rise ( page 52 ) is applied P = 2y cos 0 / r The equivalent radius ...
... radius r . The pressure required to prevent the liquid in question from entering the capillaries of this porous plug is measured , and the general equation for capillary rise ( page 52 ) is applied P = 2y cos 0 / r The equivalent radius ...
Page 132
... radius to double layer thickness ) : when кa is small , the particle may be considered as a point charge ; when it is large , the double layer is almost flat and the treatment outlined at the beginning of this chapter is applicable ...
... radius to double layer thickness ) : when кa is small , the particle may be considered as a point charge ; when it is large , the double layer is almost flat and the treatment outlined at the beginning of this chapter is applicable ...
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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