Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens
This study shows the energy optimization and stabilization in the time of solutions composed of H<sub>2</sub>O + TX-100 + Multi-Wall Carbon Nanotubes (MWCNTs), used to improve the mechanical properties of Portland cement pastes. For developing this research, sonication energies at 90, 19...
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MDPI AG
2020-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/18/4149 |
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| author | Laura M. Echeverry-Cardona Natalia Álzate Elisabeth Restrepo-Parra Rogelio Ospina Jorge H. Quintero-Orozco |
| author_facet | Laura M. Echeverry-Cardona Natalia Álzate Elisabeth Restrepo-Parra Rogelio Ospina Jorge H. Quintero-Orozco |
| author_sort | Laura M. Echeverry-Cardona |
| collection | DOAJ |
| description | This study shows the energy optimization and stabilization in the time of solutions composed of H<sub>2</sub>O + TX-100 + Multi-Wall Carbon Nanotubes (MWCNTs), used to improve the mechanical properties of Portland cement pastes. For developing this research, sonication energies at 90, 190, 290, 340, 390, 440, 490 and 590 J/g are applied to a colloidal substance (MWCNTs/TX-100 + H<sub>2</sub>O) with a molarity of 10 mM. Raman spectroscopy analyses showed that, for energies greater than 440 J/g, there are ruptures and fragmentation of the MWCNTs; meanwhile at energies below 390 J/g, better dispersions are obtained. The stability of the dispersion over time was evaluated over 13 weeks using UV-vis spectroscopy and Zeta Potential. With the most relevant data collected, sonication energies of 190, 390 and 490 J/g, at 10 mM were selected at the first and the fourth week of storage to obtain Portland cement specimens. Finally, we found an improvement of the mechanical properties of the samples built with Portland cement and solutions stored for one and four weeks; it can be concluded that the MWCNTs improved the hydration period. |
| first_indexed | 2024-03-10T16:14:58Z |
| format | Article |
| id | doaj.art-d7e2f6e526384329bc0ee041542de486 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T16:14:58Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-d7e2f6e526384329bc0ee041542de4862023-11-20T14:09:23ZengMDPI AGMaterials1996-19442020-09-011318414910.3390/ma13184149Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement SpecimensLaura M. Echeverry-Cardona0Natalia Álzate1Elisabeth Restrepo-Parra2Rogelio Ospina3Jorge H. Quintero-Orozco4Laboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, ColombiaLaboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, ColombiaLaboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, ColombiaLaboratory of Biological Materials Science and Semiconductors, Universidad Industrial de Santander, Bucaramanga 681012, ColombiaLaboratory of Biological Materials Science and Semiconductors, Universidad Industrial de Santander, Bucaramanga 681012, ColombiaThis study shows the energy optimization and stabilization in the time of solutions composed of H<sub>2</sub>O + TX-100 + Multi-Wall Carbon Nanotubes (MWCNTs), used to improve the mechanical properties of Portland cement pastes. For developing this research, sonication energies at 90, 190, 290, 340, 390, 440, 490 and 590 J/g are applied to a colloidal substance (MWCNTs/TX-100 + H<sub>2</sub>O) with a molarity of 10 mM. Raman spectroscopy analyses showed that, for energies greater than 440 J/g, there are ruptures and fragmentation of the MWCNTs; meanwhile at energies below 390 J/g, better dispersions are obtained. The stability of the dispersion over time was evaluated over 13 weeks using UV-vis spectroscopy and Zeta Potential. With the most relevant data collected, sonication energies of 190, 390 and 490 J/g, at 10 mM were selected at the first and the fourth week of storage to obtain Portland cement specimens. Finally, we found an improvement of the mechanical properties of the samples built with Portland cement and solutions stored for one and four weeks; it can be concluded that the MWCNTs improved the hydration period.https://www.mdpi.com/1996-1944/13/18/4149MWCNTsdispersionsonication energystabilitycement |
| spellingShingle | Laura M. Echeverry-Cardona Natalia Álzate Elisabeth Restrepo-Parra Rogelio Ospina Jorge H. Quintero-Orozco Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens Materials MWCNTs dispersion sonication energy stability cement |
| title | Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens |
| title_full | Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens |
| title_fullStr | Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens |
| title_full_unstemmed | Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens |
| title_short | Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens |
| title_sort | time stability dispersion of mwcnts for the improvement of mechanical properties of portland cement specimens |
| topic | MWCNTs dispersion sonication energy stability cement |
| url | https://www.mdpi.com/1996-1944/13/18/4149 |
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