The Interparticle Interaction In Titanium

Category: VI Ukrainian-Polish Symposium

THE INTERPARTICLE INTERACTION IN TITANIUM

DIOXIDE SUSPENSIONS

M.M. Soltys, Z.M. Yaremko, N.H Tkachenko

Lviv Ivan Franko National University, Lviv, Ukraine

Titanium dioxide has a number of unique properties which caused its wide application in many branches of industry. Highly dispersed titanium dioxide powder in large quantities is used as a pigment in paint compositions, the properties of which are determined by interparticle interaction to a considerable extent.

The results of the complex investigations of the aqueous suspension properties of titanium dioxide of rutile modification in the solutions of low and high molecular surfactants: TRITONCF-10, ATLASG-3300, DEXTROLOC-50, TAMOL-731 and PMAA-10 are discussed in this report. As a result of a molecular adsorption of these surfactants on the particle surface their electro surface properties and aggregate-sedimentary suspension stability are changed. The adsorption of ionic surfactants ATLASG-3300, DEXTROLOC-50, TAMOL-731 and PMAA-10 causes the increasing of the diffusion part potential of the double electric layer and the sliding plane shift into the solution depth. The character of these changes is described by the curves of the Langmuir type and correlates with the adsorption isotherms of these surfactants.

Aggregate sedimentation stability of titanium dioxide suspensions in the investigated surfactant solutions is in agreement with their electric surface properties: namely the highest aggregate sedimentation suspension stability is provided for solutions Tamol-731, for which the highest meaning of the diffusion potential of the double electric layer part is observed. For other surfactants this potential decreases and aggregate-sedimentation suspension stability in the range decreases PMAA-10>DEXTROLOC-50>ATLASG-3300>TRITONCF-10. The energy calculation of the pair particle interaction of titanium dioxide taking into account the diffusion part potential change of the double electric layer confirms the dependencies of aggregate-sedimentation suspension stability which has been found experimentally.



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