Preparation and Characterization of Nanostructured TiO2/Epoxy Polymeric Films

✍ Scribed by Marco Sangermano; Giulio Malucelli; Ezio Amerio; Roberta Bongiovanni; Aldo Priola; Anna Di Gianni; Brigitte Voit; Giancarlo Rizza

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 270 KB
• Volume: 291
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200500420

✦ Synopsis

Abstract

Summary: Titania‐containing coatings were prepared by cationic photopolymerization of an epoxy resin either by dispersion of preformed TiO~2~ nanoparticles or by their in‐situ generation through a sol‐gel dual‐cure process. The kinetics of photopolymerization was evaluated by real‐time FT‐IR, studying the effect of the TiO~2~ concentration. The properties of cured films were investigated, showing an increase of hydrophilicity on the surface of the coatings with increasing TiO~2~ content. TEM analysis demonstrated that it is possible to achieve a significantly better control of the dispersion of the inorganic particles within the organic matrix by in‐situ generation of TiO~2~, thus completely avoiding macroscopic phase separation and obtaining homogeneous, transparent coatings.

Bright‐field TEM micrograph for TIP20 dual‐cured film.

imageBright‐field TEM micrograph for TIP20 dual‐cured film.