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Kaolinite intercalation precursors

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Abstract:

The preparation and characterization of intercalated kaolinite is important for industries such as those using nanocomposites, but the number of compounds that can be intercalated into these clay minerals is rather limited. The purpose of this study was to expand the range of possible intercalants by developing intercalation precursors using both single and multiple (co-intercalation) precursor agents. Characterization of the resulting precursors was by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and differential thermal analysis (DTA). The results show that the most successful single intercalation agent was DMSO and, among the co-intercalation agents, the DMSO/CH3OH system was the best. The preparation and characterization of kao-DMSO-KAc showed that the displacement reaction is the most efficient way to expand the interlayer spacing of kaolinite. At the same time, the lateral-bilayer arrangement of the Ac in the interlayers was proven by study of de-intercalation of kao-KAc under high temperature.

Keywords: ARRANGEMENT; CO-INTERCALATION AGENTS; DE-INTERCALATION; GUEST-DISPLACEMENT REACTION; INTERCALATION PRECURSOR; KAOLINITE; LATERAL-BILAYER; SINGLE INTERCALATION SYSTEM; THERMAL DECOMPOSITION; X-RAY ANALYSES

Document Type: Research Article

DOI: https://doi.org/10.1346/CCMN.2009.0570610

Publication date: 2009-12-01

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  • The JOURNAL publishes articles of interest to the international community of clay scientists, including but not limited to areas in mineralogy, crystallography, geology, geochemistry, sedimentology, soil science, agronomy, physical chemistry, colloid chemistry, ceramics, petroleum engineering, foundry engineering, and soil mechanics. Clays and Clay Minerals exists to disseminate to its worldwide readership the most recent developments in all of these aspects of clay materials. Manuscripts are welcome from all countries.

    Clays and Clay Minerals is the official publication of The Clay Minerals Society.

    The Editor-in-Chief is Professor Joseph W. Stucki jstucki@illinois.edu

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