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Article

A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors

1
IPC/i3N-Institute for Polymers and Composites, University of Minho, 4800-058 Guimarães, Portugal
2
CMEMS—Center for MicroElectroMechanical Systems, University of Minho, 4800-058 Guimarães, Portugal
*
Author to whom correspondence should be addressed.
Materials 2019, 12(12), 2013; https://doi.org/10.3390/ma12122013
Received: 6 May 2019 / Revised: 18 June 2019 / Accepted: 19 June 2019 / Published: 23 June 2019
(This article belongs to the Special Issue Electrical, Thermal and Optical Properties of Nanocarbon Materials)
Carbon nanotubes (CNTs) are one of the most promising materials in sensing applications due to their electrical and mechanical properties. This paper presents a comparative study between CNT Buckypaper (BP) and aligned CNT-based strain sensors. The Buckypapers were produced by vacuum filtration of commercial CNTs dispersed in two different solvents, N,N-Dimethylformamide (DMF) and ethanol, forming freestanding sheets, which were cut in 10 × 10 mm squares and transferred to polyimide (PI) films. The morphology of the BP was characterized by scanning electron microscopy (SEM). The initial electrical resistivity of the samples was measured, and then relative electrical resistance versus strain measurements were obtained. The results were compared with the knocked-down vertically aligned CNT/PI based sensors previously reported. Although both types of sensors were sensitive to strain, the aligned CNT/PI samples had better mechanical performance and the advantage of inferring strain direction due to their electrical resistivity anisotropic behavior. View Full-Text
Keywords: aligned CNTs; buckypaper; knocked-down CNT; strain sensor aligned CNTs; buckypaper; knocked-down CNT; strain sensor
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MDPI and ACS Style

Santos, A.; Amorim, L.; Nunes, J.P.; Rocha, L.A.; Silva, A.F.; Viana, J.C. A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors. Materials 2019, 12, 2013. https://doi.org/10.3390/ma12122013

AMA Style

Santos A, Amorim L, Nunes JP, Rocha LA, Silva AF, Viana JC. A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors. Materials. 2019; 12(12):2013. https://doi.org/10.3390/ma12122013

Chicago/Turabian Style

Santos, Ana, Luís Amorim, João P. Nunes, Luís A. Rocha, Alexandre F. Silva, and Júlio C. Viana 2019. "A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors" Materials 12, no. 12: 2013. https://doi.org/10.3390/ma12122013

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