Epoxy-based hybrids using TiO2 nanoparticles prepared via a non-hydrolytic sol-gel route

Manabu Kobayashi (1) , Hitomi Saito (1) , Bruno Boury (2, 3) , Kimihiro Matsukawa (1) , Yoshiyuki Sugahara (4)

1 Waseda University - Department of Applied Chemistry
2 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
3 CMOS - Chimie moléculaire et organisation du solide
4 Department of Applied Chemistry, Waseda University

TiO2 nanoparticles with an average diameter of less than 10 nm were prepared via a non-hydrolytic sol-gel route in a TiCl4-diisopropyl ether-CH2Cl2 system. After modification with n-octylphosphonic acid (OPA) to increase their organophilic character, the TiO2 nanoparticles were used for preparation of TiO2/epoxy hybrid films. Characterization by FT-IR, solid-state 13C cross-polarization/magic angle spinning (CP/MAS) and 31P MAS NMR techniques showed the preservation of the n-octyl groups and the presence of Ti-O-P bonds on the surface of TiO2 nanoparticles. Hybrid films with various TiO2 contents were prepared via a wet process and casting using CH2Cl2 as a solvent. The resulting films were highly transparent. The refractive indices of TiO2/epoxy hybrid films at 633 nm increased monotonously from 1.51 for the pure polymer to 1.66 for the hybrid containing 62.4 mass% of TiO2 nanoparticles. Copyright © 2013 John Wiley & Sons, Ltd.

Mots clés: titania; epoxy resin; surface modification; organic-inorganic hybrid

Domaines: Matériaux

Manabu Kobayashi, Hitomi Saito, Bruno Boury, Kimihiro Matsukawa, Yoshiyuki Sugahara. Epoxy-based hybrids using TiO2 nanoparticles prepared via a non-hydrolytic sol-gel route. Applied Organometallic Chemistry, 2013, 27 (11), pp.673-677. ⟨10.1002/aoc.3027⟩. ⟨hal-00923228⟩