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Materials 2017, 10(7), 724; https://doi.org/10.3390/ma10070724

Characterizing the Conductivity and Enhancing the Piezoresistivity of Carbon Nanotube-Polymeric Thin Films

1
Christian Doppler Laboratory for Structural Strength Control of Lightweight Constructions, Johannes Kepler University Linz, 4040 Linz, Austria
2
Institute of Structural Lightweight Design, Johannes Kepler University Linz, 4040 Linz, Austria
3
Department of Structural Engineering, University of California, San Diego, 9500 Gilman Drive MC 0085, La Jolla, CA 92093-0085, USA
Current address: Nemak Global, The Squaire 17 Am Flughafen, 60549 Frankfurt, Germany.
*
Author to whom correspondence should be addressed.
Received: 21 April 2017 / Revised: 22 June 2017 / Accepted: 22 June 2017 / Published: 29 June 2017
(This article belongs to the Special Issue Structural Health Monitoring for Aerospace Applications 2017)
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Abstract

The concept of lightweight design is widely employed for designing and constructing aerospace structures that can sustain extreme loads while also being fuel-efficient. Popular lightweight materials such as aluminum alloy and fiber-reinforced polymers (FRPs) possess outstanding mechanical properties, but their structural integrity requires constant assessment to ensure structural safety. Next-generation structural health monitoring systems for aerospace structures should be lightweight and integrated with the structure itself. In this study, a multi-walled carbon nanotube (MWCNT)-based polymer paint was developed to detect distributed damage in lightweight structures. The thin film’s electromechanical properties were characterized via cyclic loading tests. Moreover, the thin film’s bulk conductivity was characterized by finite element modeling. View Full-Text
Keywords: carbon nanotube; lightweight design; nanocomposite; piezoresistivity; strain sensitivity; structural health monitoring carbon nanotube; lightweight design; nanocomposite; piezoresistivity; strain sensitivity; structural health monitoring
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Zhao, Y.; Schagerl, M.; Viechtbauer, C.; Loh, K.J. Characterizing the Conductivity and Enhancing the Piezoresistivity of Carbon Nanotube-Polymeric Thin Films. Materials 2017, 10, 724.

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