Stabilization of rutile TiO sub 2 nanoparticles with GLYMO in polyacrylic clear coating
Stabilizacija rutil TiO spodaj 2 nanodelcev z GLYMO v poliakrilnem transparentnem premazu

english

2012

volume 46, issue 1

surface treatment 

Inštitut za kovinske materiale in tehnologije
(Obvezni izvod spletne publikacije)

Titanium dioxide (TiO_2), in the crystal form of rutile with high refractive index, 2.7, is one of the most important inorganic pigments. In the recent years nano TiO_2 has attracted interest as an inorganic material for nanocomposites. It is used for the development of photocatalysts^1^2, semiconductors in solar cells^3^4 and for the protection of materials from UV damage^5-8. To achieve high UV absorbing efficiency of Ti0_2 nanoparticles into polymer matrix and to yield a better compatibility with polymeric materials surface treatment of Ti0_2 nanoparticles with 3-glycidyloxypropyltrimethoxysilane (GLYMO) in a polyacrylic clear coating was investigated. The grafting of GLYMO on the Ti0_2 nanoparticles surface was characterized with TGA and FTIR techniques. The stability of Ti0_2 nanoparticles in a acrylic clear coating was evaluated by zeta potential measurement. Microstructural analysis of nanoparticles was done by SEM and theinfluence of surface treatment on stability of nanoparticles in dispersionand acrylic coating was analysed. Finally the UV absorption effectivness of acrylic clear coating with treated nanoparticles of rutile Ti0_2 was measured to determine the effect of improved dispersion. The performance of nanocomposite coatings was demonstrated trough accelerated weathering by gloss measurement. The results showed that surface treatment of Ti0_2 nanoparticles with GLYMO improves nanoparticles dispersion and preserves UV protection of the acrylic clear coating.

10.07.2013