DESIGNING LAYERED DOUBLE HYDROXIDES FOR TARGETED APPLICATIONS

Conference proceedings article

Authors / Editors

Majoni, Stephen

Research Areas

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Publication Details

Author list: Hossenlopp JM, Majoni S, Machingauta C

Publisher: MINERALS, METALS & MATERIALS SOC

Place: WARRENDALE

Publication year: 2012

Start page: 405

End page: 412

Number of pages: 8

eISBN: 978-1-118-35607-4

Languages: English-Great Britain (EN-GB)

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Abstract

Layered double hydroxides (LDHs), and other similar nanodimensional layered metal hydroxides, offer promise for a number of applications ranging from controlled release of bioactive compounds to polymer fire retardant additives. Tailoring LDHs for controlled release or adsorbant applications requires an understanding of the kinetics and thermodynamics of anion release or analyte uptake. Recent work in our laboratory on the effects of systematic alteration of the metal hydroxide layer and/or anion structure will be discussed. The composition of the metal hydroxide layer provides wide tunability in reactivity for controlled release or anion exchange reactions. Anion polarity and hydrogen bonding capability can be utilized to vary the extent and rates of exchange reactions. Similar approaches to LDH structural alterations are applied to the design of potential polymer fire retardant additives. The effect of metal hydroxide layer composition and anion structure and packing influences the morphology of LDH-polymer (nanocomposites) and their thermal/fire properties.

Keywords

hydroxy double salts, layered double hydroxides, structure-reactivity relationships

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