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232 Colloid stability electrolytes and 4.8 for 2-2 electrolytes, whereas the more exact calculations via equation (8.20) give sl ...
Colloid stability 233 Experimental data are generally not in accord with the theoretical prediction in equation (8.21) regarding ...
234 Colloid stability accumulate under the influence of gravity at the bottom or at the surface. A sedimentation velocity (see T ...
Colloid stability 235 influences must be weakened sufficiently before precipitation will take place. For example, gelatin has a ...
236 Colloid stability electrolyte concentration is often sufficiently high to render electro- static stabilisation ineffective. ...
Colloid stability 23? where 2 \+jry+ x x +xy + x x + xy + x + y \x + xy + x + y ) with x and v defined as follows: forF 12 , x f ...
238 Colloid stability effect. However, it is likely that this mechanism is not significant in practice. The adsorbed layers bet ...
Colloid stability 239 negative, the dispersion should flocculate on cooling below the ^-temperature (entropic stabilisation). Th ...
240 Colloid stability and potential energy diagrams will be as schematically depicted in Figure 8.11, with entry into a deep pri ...
Colloid stability 241 Long-chain additives, such as gelatin, can sometimes bring about a rather loose flocculation by a bridgin ...
242 Colloid stability rain-water leads to peptisation and the soil packs into a hard mass which is unsuitable for plant growth. ...
Colloid stability 243 Paints. The particles in pigmented paints are often large enough to settle even when peptised; therefore, ...
9. Rheology Introduction Rheology is the science of the deformation and flow of matter, and its study has contributed much towar ...
Rheology 245 years considerable advances have been made towards understanding rheological behaviour and putting it on to a quant ...
246 Rheology dv/dr Figure 9.1 An Ostwald viscometer simple Ostwald viscometer (Figure 9.1). Sufficient liquid is introduced into ...
Rheology 247 might block the capillary, must be removed from the liquid prior to its introduction into the viscometer. A viscome ...
248 Rheology Torsion wire ( J Mirror JL Variable speed motor Figure 9.2 A concentric cylinder (Couette) viscometer forces and no ...
Viscosities of dilute colloidal solutions and dispersions Functions of viscosity When colloidal particles are dispersed in a liq ...
250 Rheology particles are dispersed in a liquid medium, and arrived at the expression 17 = 170 (1 + k$) where k is a constant e ...
Rheology 251 Electroviscous effects When dispersions containing charged particles are sheared, extra energy is required to overc ...
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