New insight into natural fiber-reinforced polymer composites as pressure sensors : experiment, theory, and application.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorCosta, Cleidinéia Cavalcante da-
Autor(es): dc.creatorMapa, Ludmila Marotta-
Autor(es): dc.creatorKelmer, Ana Carolina-
Autor(es): dc.creatorFerreira, Sukarno Olavo-
Autor(es): dc.creatorBianchi, Rodrigo Fernando-
Data de aceite: dc.date.accessioned2025-08-21T15:04:25Z-
Data de disponibilização: dc.date.available2025-08-21T15:04:25Z-
Data de envio: dc.date.issued2025-01-06-
Data de envio: dc.date.issued2025-01-06-
Data de envio: dc.date.issued2021-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/19377-
Fonte completa do material: dc.identifierhttps://4spepublications.onlinelibrary.wiley.com/doi/full/10.1002/pc.27068-
Fonte completa do material: dc.identifierhttps://doi.org/10.1002/pc.27068-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1001944-
Descrição: dc.descriptionResearch in hybrid and flexible natural fiber-reinforced polymer composites has included advances in innovative and environmentally sustainable devices. However, in practice, controversies still exist regarding the relationship between electrical and materials performance targets in a system design context. This work aimed to investigate the alternating conductivity of a novel pressure sensor based on semiconducting polyaniline (PANI)-coated vegetable fiber (VF, Euterpe oleracea Mart., Acai) in silicone polydimethylsiloxane (PDMS) rubber. We used alternating electrical conductivity measurements, σ* (ω) / ωs (frequency range—ω from 1 Hz to 10 MHz; s ~ 0.6), to adjust the optimal operating frequency region to enhance the pressure sensing performance of the PDMS-PANI-VF composites. A generalized effective-medium approach to the pressure-induced conductivity in terms of loading pressure, percolation regime, and the interpolation between Bruggeman's symmetric and asymmetric media theories was obtained. We have found a solution for inducing perco lation in composites with a low concentration of fiber inclusions by uniaxial pressure (P), characterized by the expression σ / (P-P0) t (0 ≤ t ≤ 4.0, 0 ≤ P0 ≤ 250 kPa). The sensor demonstrates maximum sensitivity of 1.5 Pa-1 in the operating electrical frequency from 1 to 100 Hz, and a wide linearity range from 0 to 250 kPa. The result provides new insight into the AC universality, s, and t behaviors of natural fiber-reinforced polymer composites to enhance pressure sensitivity of a new concept and technology for resource efficiency optimization of sustainable environmental devices.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectAC universality-
Palavras-chave: dc.subjectFlexible device-
Palavras-chave: dc.subjectFlexible electronics-
Palavras-chave: dc.subjectSustainable materials-
Título: dc.titleNew insight into natural fiber-reinforced polymer composites as pressure sensors : experiment, theory, and application.-
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