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https://hdl.handle.net/1822/78227
Título: | Development of multi-scale carbon nanofiber and nanotube-based cementitious composites for reliable sensing of tensile stresses |
Autor(es): | Parveen, Shama Vilela, Bruno Lagido, Olinda Rana, Sohel Fangueiro, Raúl |
Palavras-chave: | Multi-scale composites Carbon fibers Cement Carbon nanotubes Stress sensing |
Data: | 2022 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Nanomaterials |
Citação: | Parveen, S.; Vilela, B.; Lagido, O.; Rana, S.; Fangueiro, R. Development of Multi-Scale Carbon Nanofiber and Nanotube-Based Cementitious Composites for Reliable Sensing of Tensile Stresses. Nanomaterials 2022, 12, 74. https://doi.org/10.3390/nano12010074 |
Resumo(s): | In this work, multi-scale cementitious composites containing short carbon fibers (CFs) and carbon nanofibers (CNFs)/multi-walled carbon nanotubes (MWCNTs) were studied for their tensile stress sensing properties. CF-based composites were prepared by mixing 0.25, 0.5 and 0.75 wt.% CFs (of cement) with water using magnetic stirring and Pluronic F-127 surfactant and adding the mixture to the cement paste. In multi-scale composites, CNFs/MWCNTs (0.1 and 0.15 wt.% of cement) were dispersed in water using Pluronic F-127 and ultrasonication and CFs were then added before mixing with the cement paste. All composites showed a reversible change in the electrical resistivity with tensile loading; the electrical resistivity increased and decreased with the increase and decrease in the tensile load/stress, respectively. Although CF-based composites showed the highest stress sensitivity among all specimens at 0.25% CF content, the fractional change in resistivity (FCR) did not show a linear correlation with the tensile load/stress. On the contrary, multi-scale composites containing CNFs (0.15% CNFs with 0.75% CFs) and MWCNTs (0.1% MWCNTs with 0.5% CFs) showed good stress sensitivity, along with a linear correlation between FCR and tensile load/stress. Stress sensitivities of 6.36 and 11.82%/MPa were obtained for the best CNF and MWCNT-based multi-scale composite sensors, respectively. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/78227 |
DOI: | 10.3390/nano12010074 |
ISSN: | 2079-4991 |
Versão da editora: | https://www.mdpi.com/2079-4991/12/1/74 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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nanomaterials-12-00074-v2.pdf | 11,35 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons