Preparation and Characterization of a Kaolinite-1-methyl-2-Pyrrolidone Intercalation Compound

Well-crystallized kaolinite was initially reacted at 60°C with a water–dimethyl sulfoxide mixture. After washing and characterization, the resulting material (Al2Si2O5(OH)4(DMSO)0,4) was reacted with 1-methyl-2-pyrrolidone (NMP) at room temperature. The product was a light yellow powder with a stoic...

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Bibliographic Details
Published in:Journal of colloid and interface science 1999-03, Vol.211 (1), p.137-141
Main Authors: Gardolinski, José Eduardo, Peralta-Zamora, Patricio, Wypych, Fernando
Format: Article
Language:English
Subjects:
1-methyl-2-pyrrolidone
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
intercalation compounds
kaolinite
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Summary:Well-crystallized kaolinite was initially reacted at 60°C with a water–dimethyl sulfoxide mixture. After washing and characterization, the resulting material (Al2Si2O5(OH)4(DMSO)0,4) was reacted with 1-methyl-2-pyrrolidone (NMP) at room temperature. The product was a light yellow powder with a stoichiometry that attests to the quantitative substitution of the DMSO by the NMP molecules. (Al2Si2O5(OH)4(NMP)0,39±0,02) was characterized by X-ray diffractometry, thermal analysis (simultaneous TG and DSC), and FTIR. The fact that the NMP molecules are located in the interlamellar space of the kaolinite permits a notable enhancement of the thermal stability of the complex. While the DMSO-derived system decomposes at 175°C under air, the NMP complex remains stable up to 431°C.
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1998.5982