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

✍ Scribed by José Eduardo Gardolinski; Patricio Peralta-Zamora; Fernando Wypych

• Book ID: 102582710
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 62 KB
• Volume: 211
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1998.5982

✦ Synopsis

Well-crystallized kaolinite was initially reacted at 60°C with a water-dimethyl sulfoxide mixture. After washing and characterization, the resulting material (Al 2 Si 2 O 5 (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. (Al 2 Si 2 O 5 (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 DMSOderived system decomposes at 175°C under air, the NMP complex remains stable up to 431°C.