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Artigo Produção Nacional Revisado por pares
BIBTEX RIS

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

1999; Elsevier BV; Volume: 211; Issue: 1 Linguagem: Inglês

10.1006/jcis.1998.5982

ISSN

1095-7103

Autores

José Eduardo Ferreira da Costa Gardolinski, Patrício Peralta-Zamora, Fernando Wypych,

Tópico(s)

Glass properties and applications

Resumo

Well-crystallized kaolinite was initially reacted at 60 degreesC 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 degreesC under air, the NMP complex remains stable up to 431 degreesC. Copyright 1999 Academic Press.

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