DMSO Intercalation in Selected Kaolinites: Influence of the Crystallinity
The present study deals with the relation between crystalline order in kaolinites and their ability to intercalate DMSO. Raw clays and kaolinite–DMSO complexes are analyzed using FTIR, XRD powder diffraction and differential scanning calorimetry and thermogravimetric analysis (DSC-TGA). The crystall...
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MDPI AG
2020-12-01
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| Series: | ChemEngineering |
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| Online Access: | https://www.mdpi.com/2305-7084/4/4/66 |
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| author | Jean-Aimé Mbey Jean Mermoz Siéwé Cyrill Joël Ngally Sabouang Angelina Razafitianamaharavo Sakeo Kong Fabien Thomas |
| author_facet | Jean-Aimé Mbey Jean Mermoz Siéwé Cyrill Joël Ngally Sabouang Angelina Razafitianamaharavo Sakeo Kong Fabien Thomas |
| author_sort | Jean-Aimé Mbey |
| collection | DOAJ |
| description | The present study deals with the relation between crystalline order in kaolinites and their ability to intercalate DMSO. Raw clays and kaolinite–DMSO complexes are analyzed using FTIR, XRD powder diffraction and differential scanning calorimetry and thermogravimetric analysis (DSC-TGA). The crystallinity is accessed using the Hinckley index (HI) from the raw clays’ XRD patterns and the <i>p</i><sub>2</sub> factor from their FTIR spectra. The intercalation ratio is evaluated from XRD and compared among the samples. The thermal analyses show a decrease in the dehydroxylation temperature in the DMSO–kaolinite complexes, indicating a decrease in the interlayer cohesion that may be useful to improve the delamination of kaolinite. The analysis of the coherent scattering domain size in the raw and the DMSO-intercalated samples indicates that the ordering is not affected during the DMSO intercalation. From these results, it is deduced that DMSO intercalation is favored by an increased crystallinity, as revealed by the intercalation ratio from XRD and the DSMO release during DSC-TGA analysis. |
| first_indexed | 2024-03-10T13:54:02Z |
| format | Article |
| id | doaj.art-31f4ac5dce4b462d95074578b141995e |
| institution | Directory Open Access Journal |
| issn | 2305-7084 |
| language | English |
| last_indexed | 2024-03-10T13:54:02Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | ChemEngineering |
| spelling | doaj.art-31f4ac5dce4b462d95074578b141995e2023-11-21T01:48:35ZengMDPI AGChemEngineering2305-70842020-12-01446610.3390/chemengineering4040066DMSO Intercalation in Selected Kaolinites: Influence of the CrystallinityJean-Aimé Mbey0Jean Mermoz Siéwé1Cyrill Joël Ngally Sabouang2Angelina Razafitianamaharavo3Sakeo Kong4Fabien Thomas5Laboratory of Applied Inorganic Chemistry, Department of Inorganic Chemistry, University of Yaoundé 1, P.O. Box 812, Yaoundé, CameroonLaboratory of Applied Inorganic Chemistry, Department of Inorganic Chemistry, University of Yaoundé 1, P.O. Box 812, Yaoundé, CameroonDepartment of Chemistry, Higher Teacher Training College, University of Bamenda, P.O. Box 39, Bambili, CameroonLaboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Université de Lorraine, CNRS, UMR 7360, F-54000 Nancy, FranceLaboratory of Applied Inorganic Chemistry, Department of Inorganic Chemistry, University of Yaoundé 1, P.O. Box 812, Yaoundé, CameroonLaboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Université de Lorraine, CNRS, UMR 7360, F-54000 Nancy, FranceThe present study deals with the relation between crystalline order in kaolinites and their ability to intercalate DMSO. Raw clays and kaolinite–DMSO complexes are analyzed using FTIR, XRD powder diffraction and differential scanning calorimetry and thermogravimetric analysis (DSC-TGA). The crystallinity is accessed using the Hinckley index (HI) from the raw clays’ XRD patterns and the <i>p</i><sub>2</sub> factor from their FTIR spectra. The intercalation ratio is evaluated from XRD and compared among the samples. The thermal analyses show a decrease in the dehydroxylation temperature in the DMSO–kaolinite complexes, indicating a decrease in the interlayer cohesion that may be useful to improve the delamination of kaolinite. The analysis of the coherent scattering domain size in the raw and the DMSO-intercalated samples indicates that the ordering is not affected during the DMSO intercalation. From these results, it is deduced that DMSO intercalation is favored by an increased crystallinity, as revealed by the intercalation ratio from XRD and the DSMO release during DSC-TGA analysis.https://www.mdpi.com/2305-7084/4/4/66kaolinitecrystallinityDMSOintercalationthermal analysis |
| spellingShingle | Jean-Aimé Mbey Jean Mermoz Siéwé Cyrill Joël Ngally Sabouang Angelina Razafitianamaharavo Sakeo Kong Fabien Thomas DMSO Intercalation in Selected Kaolinites: Influence of the Crystallinity ChemEngineering kaolinite crystallinity DMSO intercalation thermal analysis |
| title | DMSO Intercalation in Selected Kaolinites: Influence of the Crystallinity |
| title_full | DMSO Intercalation in Selected Kaolinites: Influence of the Crystallinity |
| title_fullStr | DMSO Intercalation in Selected Kaolinites: Influence of the Crystallinity |
| title_full_unstemmed | DMSO Intercalation in Selected Kaolinites: Influence of the Crystallinity |
| title_short | DMSO Intercalation in Selected Kaolinites: Influence of the Crystallinity |
| title_sort | dmso intercalation in selected kaolinites influence of the crystallinity |
| topic | kaolinite crystallinity DMSO intercalation thermal analysis |
| url | https://www.mdpi.com/2305-7084/4/4/66 |
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