Characterization of TiO2 surface following the modification with silane coupling agents

Teofil Jesionowski,Joanna Koprowska,Jadwiga Sójka-Ledakowicz,Beata Pęczkowska,Katarzyna Siwińska-Stefańska,Andrzej Krysztafkiewicz

doi:10.2478/v10026-007-0094-8

Abstract

Characterization of TiO2 surface following the modification with silane coupling agents Studies were conducted on the modification of titanium white surface using selected silane coupling agents. The effect of the concentration of the organic coupling agents was examined (0.5; 1 or 3 weight parts per 100 weight parts of TYTANPOL R-003, TYTANPOL R-211 or TYTANPOL R-213 preparation of titanium white). The dispersive properties were determined by an estimation of the particle size distribution curves and of the polydispersity index. Moreover, microscopic observations were conducted permitting to evaluate the surface morphology of the modified TiO2 particles. The profiles of sedimentation in water were also determined for the titanium whites and the BET specific surface areas were determined. Selected samples of the modified and unmodified titanium whites were subjected to elemental analysis.

Highlights

White inorganic pigments are fully dominated by titanium dioxide
The advantages of using titanium white as a pigment are determined by its high index of light refraction, physical and chemical stability, the potential for control of crystalline particle size and for the modification of surface morphology
The performed studies on the modification of the titanium white surface character employing the silane coupling agents showed that the application of 1 weight part of the silane altered the surface character of TiO2

Summary

Introduction

White inorganic pigments are fully dominated by titanium dioxide. Titanium dioxide (titanium white) represents the most important pigment in paint and varnish industry due to its excellent optical properties manifested by the high staining and coating abilities as well as its whiteness[1,2,3]. The advantages of using titanium white as a pigment are determined by its high index of light refraction, physical and chemical stability, the potential for control of crystalline particle size and for the modification of surface morphology. The modification of titanium white surface was conducted using the following silane coupling agents: 3-methacryloxypropyltrimethoxysilane (U-511); vinyltrimethoxysilane (U-611) and N-2-(aminoethyl)-3aminopropyltrimethoxysilane (U-15D).

Results

Conclusion