Controlled modification of sodium montmorillonite clay by a planetary ball-mill as a versatile tool to tune its properties
| Autor: | Mario Valera-Zaragoza, Miguel Avalos-Borja, Margarita Lopez-Medina, A. Karin Navarro-Mtz, Shunashi Dehesa-Blas, Erick A. Juarez-Arellano, Diana Agüero-Valdez |
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| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Materials science General Chemical Engineering Analytical chemistry Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Exfoliation joint 0104 chemical sciences Amorphous solid chemistry.chemical_compound Montmorillonite chemistry Mechanics of Materials Transmission electron microscopy Specific surface area 0210 nano-technology Ball mill |
| Zdroj: | Advanced Powder Technology. 32:591-599 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2021.01.004 |
| Popis: | The effect of the energy supplied ( E supp ) by the planetary ball-mill on montmorillonite clay is studied. Sodium montmorillonite clay was subjected to different energies supplied, and the effects were followed by transmission electron microscopy, X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, and specific surface area (BET). The results show that between 1.7 J/g ⩽ E supp ⩽ 4.8 J/g, the separation, delamination, and exfoliation of the clay layers occur. At E supp ⩾ 6.6 J/g, the stacking of the layers is lost. At E supp = 13.2 J/g, the maximum specific surface area is obtained. Between 26.4 J/g ⩽ E supp ⩽ 38.5 J/g, a transition occurs, and the clay becomes amorphous. These results establish criteria based on the planetary ball-mill’s energy to modify the montmorillonite structure optimally. |
| Databáze: | OpenAIRE |
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