Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 323, Issue 1, Pages 84-91Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2008.03.051
Keywords
hydrothermal synthesis; ZrO2 nanocrystallites; MPTS, (MPS, MAPTS, MEMO) surface modification; UV cured acrylate films
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Surface functionalized zirconia nanoparticles were prepared by covalent grafting of a methacrylate functionalized silane (methacryloxypropyltrimethoxysilane, MPTS) onto the surface of the zirconia nanoparticles (tetragonal and mixed monoclinic/tetragonal phase) obtained by hydrothermal treatment of zirconyl chloride octahydrate. The particles are 70 turn aggregates of nanometric primary grains (4-12 nm) with inter particle porosity. BET measurements show that the specific surface area of the particles after activation at 100 degrees C is between 85 and 204 m(2)/g depending on the mineralizer used (Sr2+, Ca2+, Mg2+). IR-measurements show that the surface of the particles can be covered with functional groups bound through a variable number of Zr-O-Si bonds to render them organocompatible. The surface modified particles were dispersed in monomer solution (butanediol monoacrylate, BDMA) and polymerized to form films by adding a cross linking agent (trimethylolpropane triacrylate, Laromer TMPTA) and an UV initiator (2,4,6-trimethylbenzoyldiphenylphosphine oxide, Lucirin TPO). The received films were characterized with thermogravimetry and UV-vis spectroscopy. (C) 2008 Elsevier Inc. All rights reserved.
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