55 research outputs found
Complex Investigations of Double Layer of Colloid Particles. Electric Conductivity of Suspensions and Anisotropy of Electrophoresis
Get PDFConditions for obtaining quantitative .ililformation on the double
layer of colloid particles on the basis of electrosurface measurements
have been analyzed. A rigorous theory of electric conductivdty
of diluted suspensions on the basis of induced dilpole
moments of particles has been presented.
The .isoconductance point of a suspension has been shown to
codncide wd.th the isopolarisation state of a particle. A theory of
anisotropy of the electrophoresis of long rod-like particles has been
put forward. The identity of the formules of electrophoresis of a
sphere and of cylindrical particles oriented pevpendicular towards
the field at a small thickness of the double layer has been shown.
A good agreement has been found between the values of induced
dipole moments and, specific surface conductivity in a wide electrolite
concentration range measured by the methods of electric
conductivity of suspensions and anisotropy of electrophoresis. The
theories of induced dipole moment, electric conductivity of suspension
and anisotropy of electrophoresis have been experimentally
examined
Methods of measuring rheological properties of interfacial layers (Experimental methods of 2D rheology)
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Slow coagulation and relaxation of the compact part of the double layer.
No full textThe departure from equilibrium of the electric double layers of colloid particles is taken into account in the theory on the electrostatic interaction of such particles. This departure leads to an additional component of the disjoining pressure, which just as the viscous force of a thinning liquid interlayer, is proportional to the rate of mutual approach of particles. Therefore, siwww.lw20.commilarly to hydrodynamic interaction, the departure from equilibrium of the interacting double layers of particles leads to a decrease of their Brownian interdiffusion coefficient. Due to this new effect, the rate of slow coagulation can decrease in the order of magnitude. The theory is developed as applied to the interaction of plate-like particles and Martynov's double layer mode
Modelling of the double layer and electrosorption of a patchwise heterogeneous surface on the basis of its homogeneous analogue. 1. Non-interacting patches.
No full textElektrostatitechskoe vzaimodeistvie kolloidnykh chastits i otklonenie ikh dvoinykh sloev ot elektroneitral'nosti. (= Electricostatic interaction between colloidal particles and the deviation from electroneutrality of their double layers.)
No full textThe relaxation of the double layer around Colloidal particles and the low-frequency dielectriec dispersion. I. Theoretical considerations
No full textElektroforez i elektroprovodnost suspenzii pri kvaziravnovesnoj polyarizatsii dvojnovo sloya v tselom (Electrophoresis and electrical conductivity of suspensions under quasi-equilibrium polarisation of the double layer as a whole).
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