Ultrasonic Treatment Enhanced Surface Modification of Titanium Oxide by Tailor-Made Surface-Active Polymers

N. Bulychev; E. Kisterev; H. Reimann; C. Schaller; C. D. Eisenbach

doi:10.18321/ectj305

Authors

N. Bulychev Institute for Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
E. Kisterev N.S. Kurnakov Institute for General and Inorganic Chemistry of Russian Academy of Sciences, 119991, Leninsky avenue, 31, Moscow, Russia,
H. Reimann Research Institute for Pigments and Coatings, Allmandring 37, D-70569 Stuttgart, Germany
C. Schaller Research Institute for Pigments and Coatings, Allmandring 37, D-70569 Stuttgart, Germany
C. D. Eisenbach Research Institute for Pigments and Coatings, Allmandring 37, D-70569 Stuttgart, Germany

DOI:

https://doi.org/10.18321/ectj305

Abstract

The surface modification of titanium dioxide in aqueous dispersions of specially tailor-made periodic acrylic acid/isobutylene copolymers, poly(acrylic acid)/polystyrene graft copolymers, and hydrophobically modified polyethyleneoxide urethane (HEUR) by ultrasonic treatment was studied. The pigment surface modification by the above copolymers was comparatively investigated regarding conventional adsorption as contrasted to an ultrasonic treatment assisted procedure. The course and efficiency of the polymer adsorpption onto the pigment surface was quantified by electrokinetic sonic amplitude measurements. The higher efficiency of the pigment surface coating by the copolymers as achieved by ultrasonic treatment varies with the copolymer architecture and is a consequence of ultrasonically induced pigment surface activation.

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