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Título
Synthesis and characterization of organosaponites. Thermal behavior of their poly(vinyl chloride) nanocomposites
Autor(es)
Materia
Saponite
PVC
Organoclay
Titanium modified saponite
Surfactant
Clasificación UNESCO
2303.21-1 Síntesis de Nuevos Materiales a Partir de Compuestos Organometálicos
Fecha de publicación
2014
Editor
Elsevier
Resumen
[EN]The aim of this work was to synthesize and characterize the structural properties of the materials resulting from
the combination of a synthetic saponitewith several organicmolecules, namely, Arquad 2HT-75, octadecylamine,
3-aminopropyltriethoxysilane, trimethyloctadecylammonium bromide and tetraethoxysilane, or combinations
of them, and with or without the addition of HCl during synthesis. The ratios organic molecule/saponite and
HCl/organic molecule were considered as synthesis variables. Structural characterization was based on X-ray
diffraction (XRD), simultaneous thermogravimetric/differential thermal analysis (TG/DTA) and infrared
spectroscopy (FTIR). The chemical composition of the materials was determined through X-ray fluorescence
(XRF) and atomic absorption spectroscopy (AAS), and theirmorphologywas analyzed through scanning electron
microscopy (SEM). The values obtained for the basal spacings were a function of the type and amount of the
organic molecule. Otherwise, HCl did not significantly influence the basal spacing, but it had the capacity to
significantly modify the morphology and the chemical composition of the samples. From the results found, the
solids modified with tetraethoxysilane and 3-aminopropyltriethoxysilane were selected to incorporate various
titaniumprecursors. These neworgano-modified saponiteswere used in the formulation of PVC nanocomposites
and their thermal behavior was evaluated at two temperatures (70 and 180 °C).
URI
DOI
10.1016/j.clay.2014.06.014
Versión del editor
Colecciones
Patrocinador
IPT-420000-2010-015