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Thermal Characterization of Poly(Styrene Sulfonate)/Layered Double Hydroxide Nanocomposites

Published online by Cambridge University Press:  28 February 2024

Christopher O. Oriakhi ,
Isaac V. Farr  and
Michael M. Lerner
Christopher O. Oriakhi
Affiliation:
Department of Chemistry and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331
Isaac V. Farr
Affiliation:
Department of Chemistry and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331
Michael M. Lerner
Affiliation:
Department of Chemistry and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331
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Abstract

Phase and morphological changes during thermolysis of Mg4Al2(OH)12CO3·nH2O and Zn6Al2(OH)16CO3·nH2O layered double hydroxides (LDH) and their nanocomposites with poly(styrene sulfonate) (PSS) are studied by X-ray powder diffraction (XRD), scanning and transmission electron micrography (SEM and TEM) and thermal analyses. Mg4Al2(OH)12CO3·nH2O and Mg2Al(OH)6[CH2CH(C6H4SO3)]·3H2O show comparable thermal stabilities: the layered structure is lost above 300 °C with the nucleation of the MgO phase at approximately 400 °C and the MgAl2O4 phase at approximately 800 °C Zn3Al(OH)8[CH2CH(C6H4SO3)]·nH2O undergoes complete oxidative pyrolysis of the polyanion by 500 °C. Crystalline oxide products are obtained at a temperature approximately 300 °C lower than that of thermolysis of Zn6Al2(OH)16CO3·nH2O. The SEM and TEM images show that the thermolysis of LDH carbonates produces dense aggregates containing microcrystalline particles, whereas Mg2Al(OH)6[CH2CH(C6H4SO3)]·3H2O forms a macroporous solid.

Keywords

Layered Double HydroxidesNanocompositesPoly(styrene sulfonate)
Type
Research Article
Information
Clays and Clay Minerals , Volume 45 , Issue 2 , April 1997 , pp. 194 - 202
Copyright
Copyright © 1997, The Clay Minerals Society

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