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NMR study of surfactant molecules intercalated in montmorillonite and in silylated montmorillonite

Published online by Cambridge University Press:  09 July 2018

J . Grandjean ,
J . Bujdák  and
P . Komadel
J . Grandjean*
Affiliation:
University of Liege, Institute of Chemistry B6a, COSM, Sart, TilmanB-4000 Liege, Belgium
J . Bujdák
Affiliation:
Institute of Inorganic Chemistry, Slovak Academy of Sciences, BratislavaSK-842 36, Slovak Republic
P . Komadel
Affiliation:
Institute of Inorganic Chemistry, Slovak Academy of Sciences, BratislavaSK-842 36, Slovak Republic
*
*E-mail: j.grandjean@ulg.ac.be
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Abstract

13C CP MAS NMR and 29Si MAS NMR were used to characterize silylated montmorillonites and to estimate the extent of the silylation reaction. Indirectly-detected proton relaxation times of the intercalated surfactant were measured in both silylated and non-silylated clay systems to monitor the dynamics of intercalated species. A greater degree of mobility in the silylated montmorillonites was found. The lack of NMR information resulting from paramagnetic interaction brought about by structural Fe(III) ions was considered. The resulting broadening can prevent the estimation of the trans/gauche conformer ratio of the intercalated surfactant alkyl chain.

Keywords

2:1 phyllosilicatemontmorillonitesup13/supC CP MASsup13/supSi CP MAS NMR
Type
Research Article
Information
Clay Minerals , Volume 38 , Issue 3 , September 2003 , pp. 367 - 373
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2003

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