Premium
Macromolecular nature of nanosheets of quasi‐TiO 2 from (tetra‐isopropyl)orthotitanate modified by methacrylic acid
Author(s) -
Wojciechowski Piotr,
Halamus Tomasz,
Sadowska Maja,
Bobowska Izabela
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1396
Subject(s) - hydrosol , materials science , raman spectroscopy , peptization , chemical engineering , methacrylic acid , nanotechnology , copolymer , composite material , optics , polymer , engineering , physics
In this paper we concentrate on the general behavior of oxotitanium hydrosol, which was earlier developed by us as a precursor of the TiO 2 nanoparticles and nanocomposite. The oxotitanium hydrosol was synthesized by the chemical decomposition of a molecular complex of the methacrylic acid/(tetra‐isopropyl)orthotitanate (MAA/TIPT) by means of the hydrogen peroxide. The raw product chemical decomposition of MAA/TIPT is the colloidal suspension of the oxotitanium compound in the water. The oxotitanium compound was separated from hydrosol and identified on the basis of X‐ray and Raman spectroscopy investigations. The status of water in the hydrosol was also investigated by the Raman spectroscopy. The photophysical behaviors of the oxotitanium hydrosol on the basis of the light absorption and photoluminescence (PL) investigations are presented. The light absorption (260 nm) and PL emission (313 nm) allow us to identify the inorganic phase of hydrosol as nanosheets' crystallites of quasi‐TiO 2 . Macromolecular nature of nanosheets of quasi‐TiO 2 was revealed only for a higher concentration solution of nanosheets' crystallites of quasi‐TiO 2 at the hydrosol. A macromolecular nature of nanosheets of quasi‐TiO 2 by the red shift of absorption edge and PL wavelength with increase in the concentration of the oxotitanium hydrosol as well as the formation of hydrogels and birefringence developed under an influence of mechanical shearing is evidenced. Copyright © 2009 John Wiley & Sons, Ltd.