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http://cicy.repositorioinstitucional.mx/jspui/handle/1003/2243| A comparative study of the electrical and electromechanical responses of carbon nanotube/polypropylene composites in alternating and direct current | |
| Abraham Isaías Balam Mena Raúl Pech ZAREL VALDEZ NAVA Fidel Fernando Gamboa Perera Alejandro Castillo Atoche FRANCIS AVILES CETINA | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| CARBON NANOTUBES ELECTRICAL PROPERTIES ALTERNATING CURRENT ELECTROMECHANICAL PIEZOIMPEDANCE PIEZORESISTIVITY | |
| The electrical and electromechanical responses of ~200 µm thick extruded nanocomposite films comprising of 4 wt.% and 5 wt.% multiwall carbon nanotubes mixed with polypropylene are investigated under an alternating current (AC) and compared to their direct current (DC) response. The AC electrical response to frequency (f) and strain (piezoimpedance) is characterized using two configurations, namely one that promotes resistive dominance (resistive configuration) and the other that promotes the permittivity/capacitive contribution (dielectric configuration). For the resistive configuration, the frequency response indicated a resistive–capacitive (RC) behavior (negative phase angle, θ), with a significant contribution of capacitance for frequencies of 104 Hz and above, depending on the nanotube content. The piezoimpedance characterization in the resistive configuration yielded an increasing impedance modulus (|Z|) and an increasing (negative) value of θ as the strain increased. The piezoimpedance sensitivity at f = 10 kHz was ~30% higher than the corresponding DC piezoresistive sensitivity, yielding a sensitivity factor of 9.9 for |Z| and a higher sensitivity factor (~12.7) for θ. The dielectric configuration enhanced the permittivity contribution to impedance, but it was the least sensitive to strain. © 2022 by the authors. Licensee MDPI, Basel, Switzerland. | |
| 2022 | |
| Artículo | |
| Sensors, 22(2), 484, 2022. | |
| Inglés | |
| Balam, A.; Pech-Pisté, R.; Valdez-Nava, Z.; Gamboa, F.; Castillo-Atoche, A.; Avilés, F. A Comparative Study of the Electrical and Electromechanical Responses of Carbon Nanotube/Polypropylene Composites in Alternating and Direct Current. Sensors 2022, 22, 484. https://doi.org/10.3390/s22020484 | |
| PROPIEDADES DE LOS MATERIALES | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos de Investigación Arbitrados |
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