In situ preparation of nanocomposites by surface treatment of titanium dioxide particles with a layered double hydroxide Online publication date: Thu, 04-Oct-2012
by Maria Lindsay; Stuart Croll
International Journal of Nanotechnology (IJNT), Vol. 9, No. 10/11/12, 2012
Abstract: It is difficult to incorporate nanoparticles in a matrix because the huge number of particles and their enormous surface area dictate that one must expend large amounts of energy in dispersing them and one must find ways to maintain their separation because their surface chemistry is often sufficiently different from the matrix that flocculation via phase separation must be overcome. In many technologies, titanium dioxide is a common white pigment. There is commonly a surface treatment on titanium dioxide particles of a mixed aluminium hydroxide which is partially soluble and is thus available to participate in the formation of a layered double hydroxide, LDH. Thus an in situ preparation of a nanocomposite comprising an LDH and a polymer would take advantage of the presence of the pigment and provide potentially useful gains in physical properties. A zinc-aluminium LDH was precipitated on TiO2 particles. X-Ray diffraction confirmed the structure of the LDH and one could detect the change in surface chemistry of the TiO2 particles by examining their zeta potential in an aqueous dispersion. These materials were incorporated into simple polymeric coating films using polyethylene oxide where the LDH treated particles improved the mechanical properties of the polymer and changed the polymer crystallinity and its glass transition behaviour.
Online publication date: Thu, 04-Oct-2012
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Nanotechnology (IJNT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email email@example.com