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INCORPORATING OF COLORED AZODERIVATES IN HYBRID MATRICES

Y. Ivanova1,* , H. Hristov1, Sn. Handjieva1, Ch. Petkov1

Affiliation

  1. University of Chemical Technology and Metallurgy, Dept. of Silicate Technology, 8, blvd. Kl. Ohridski, 1756 Sofia, Bulgaria

Abstract

From a scientific and practical point of view, it is of great interest to investigate the behavior of different chromophor systems (organic pigments and azo dyes) after their incorporation during the formation of boron hybrid matrices. For the synthesis, we used 5% solutions of the following chromophors: yellow light-resistant dye, green nitroso dye, red azo dye, and violet azo dye with an incorporated UV-filter. The starting components for the sol-gel matrix were (CH3O)3B, (C2H5O)4Si, PEG400 and PVA72000. The hybrid matrix: chromophor ratio was 10:0.3. Visible estimation after mixing and subsequent formation of the hybrid network showed that well colored gel films (yellow light resistant, green, red, violet), with good hydrophobic properties, could be obtained with minimum quantities of chromophor. All the gel films retained their color characteristics up to 100 oC. Coatings derived with green nitroso-dye had the best thermal stability (up 230 oC). In the other combinations, there were color changes and a decrease in the elasticity of the gel films, which became brittle and not monolithic. UV-VIS analysis confirmed the retention of the chromophor system after incorporation in the hybrid boron matrix..

Keywords

Boron containing hybrids, Coatings, Colored films, Sol-gel.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

Y. Ivanova, H. Hristov, Sn. Handjieva, Ch. Petkov, INCORPORATING OF COLORED AZODERIVATES IN HYBRID MATRICES, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 241-244 (2005)