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Intercalation of Al13-Polyethyleneoxide Complexes into Montmorillonite Clay

Published online by Cambridge University Press:  28 February 2024

Emmanuelle Montarges ,
Laurent J. Michot ,
François Lhote ,
Thomas Fabien  and
Frédéric Villieras
Emmanuelle Montarges
Affiliation:
Laboratoire Environnement et Minéralurgie, rue du doyen Marcel Roubault, BP 40 54501 Vandoeuvre cedex, France
Laurent J. Michot*
Affiliation:
Laboratoire Environnement et Minéralurgie, rue du doyen Marcel Roubault, BP 40 54501 Vandoeuvre cedex, France
François Lhote
Affiliation:
Centre de Recherches Pérographiques et Géochimiques, rue Notre Dame des Pauvres, 54500 Vandoeuvre, France
Thomas Fabien
Affiliation:
Laboratoire Environnement et Minéralurgie, rue du doyen Marcel Roubault, BP 40 54501 Vandoeuvre cedex, France
Frédéric Villieras
Affiliation:
Laboratoire Environnement et Minéralurgie, rue du doyen Marcel Roubault, BP 40 54501 Vandoeuvre cedex, France
*
*Author to whom correspondence should be addressed.
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Abstract

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Novel promising modified clays adsorbents were synthesized by intercalating hydroxy-Al polymer associated with poly(ethyleneoxide) in the interlayer of montmorillonite. Two different PEOs of low molecular weight (600) and high molecular weight (100,000) were used. In both cases, the resulting materials are hydrolytically stable and display a slightly better crystallinity than the materials prepared in the absence of PEO. Thermal analysis and infrared spectroscopy indicate changes in the PEO molecular conformation after intercalation revealing interactions between the polycations and the organic molecules. The chain length of the polymer has a strong influence on the surface area of the pillared materials obtained after calcination at 500°C. The use of the high molecular weight polymer leads to products with a higher specific surface area (about 400 m2/g) whereas the lower molecular weight compound does not modify significantly the surface areas. This behavior can be explained by the different nature of the species intercalated in the interlayer. PEO(600) leads to isolated organometallic species whereas PEO(100,000) seems to lead to a network of complexed polycations linked by ethylene oxide units. In the case of the PEO(100,000), high amounts of polymer in the pillaring solution provoke a partial dissolution of the octahedral layer of the clay.

Keywords

Al13IntercalationMicroporousMontmorillonitePolyethyleneoxide
Type
Research Article
Information
Clays and Clay Minerals , Volume 43 , Issue 4 , August 1995 , pp. 417 - 426
Copyright
Copyright © 1995, The Clay Minerals Society

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