MWCNT–Epoxy Nanocomposite Sensors for Structural Health Monitoring

Sam-Daliri, Omid; Faller, Lisa-Marie; Farahani, Mohammad Reza; Roshanghias, Ali; Oberlercher, Hannes; Mitterer, Tobias; Araee, Alireza; Zangl, Hubert

doi:10.3390/electronics7080143

Cited by 30 publications

(11 citation statements)

References 41 publications

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“…Zero-dimensional (0D), 1D and 2D carbon structures have the potential to become materials of the next generation to be used in a series of applications, ranging from neuroscience [1] to energy fields [2]. As for materials for energy applications the research has been very active in recent years [3] and the interest includes, among other fields, supercapacitors [4], energy harvesting/storage [3,5], conversion devices [6,7], flexible electronics [8], sensors [9,10] and other electrochemical applications [11,12]. The limited amount in nature, the increasing price and demand for conventional materials (in particular metals) suggest that low-cost, high-performance and new materials would be desirable [13].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Conductive Paths Obtained by Laser Processing of Non-Conductive Carbon Nanotube/Polypropylene Composites

et al. 2021

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Functional materials are promising candidates for application in structural health monitoring/self-healing composites, wearable systems (smart textiles), robotics, and next-generation electronics. Any improvement in these topics would be of great relevance to industry, environment, and global needs for energy sustainability. Taking into consideration all these aspects, low-cost fabrication of electrical functionalities on the outer surface of carbon-nanotube/polypropylene composites is presented in this paper. Electrical-responsive regions and conductive tracks, made of an accumulation layer of carbon nanotubes without the use of metals, have been obtained by the laser irradiation process, leading to confined polymer melting/vaporization with consequent local increase of the nanotube concentration over the electrical percolation threshold. Interestingly, by combining different investigation methods, including thermogravimetric analyses (TGA), X-ray diffraction (XRD) measurements, scanning electron and atomic force microscopies (SEM, AFM), and Raman spectroscopy, the electrical properties of multi-walled carbon nanotube/polypropylene (MWCNT/PP) composites have been elucidated to unfold their potentials under static and dynamic conditions. More interestingly, prototypes made of simple components and electronic circuits (resistor, touch-sensitive devices), where conventional components have been substituted by the carbon nanotube networks, are shown. The results contribute to enabling the direct integration of carbon conductive paths in conventional electronics and next-generation platforms for low-power electronics, sensors, and devices.

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Section: Introductionmentioning

confidence: 99%

Multifunctional Conductive Paths Obtained by Laser Processing of Non-Conductive Carbon Nanotube/Polypropylene Composites

et al. 2021

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“…The process parameters of the FSW process were considered based on the experimental design. In experimental design, each factor was set between the high and the low levels [29][30][31]. The process parameters of the FSW process were considered based on the experimental design.…”

Section: Resuls and Discussionmentioning

confidence: 99%

Effect of friction stir welding parameters on the residual stress distribution of Al-2024-T6 alloy

Farhang¹,

Sam-Daliri²,

Farahani³

et al. 2021

JMES

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The objective of this study was to investigate the influences of the main parameters of friction stir welding (FSW) on the residual stresses remained in the FSW of Al 2024-T6. The main parameters were tool rotational speed and tool transverse speed. The effect of these parameters on the residual stresses was studied in both finite element simulation and hole drilling strain gauge measurement. The results showed a good agreement between the numerical results and the experimental outcomes. The change in transverse speed from 25 to 31.5 mm/min resulted in increase of longitudinal residual stresses in welding centerline in which the longitudinal residual stress was increased at the tool rotational speed of 1120 rpm and 1600 rpm about 12.5% and 2.67%, respectively. The results showed that at the low rotational speed, the strain rate had the most effect on the residual stresses whereas at the high rotational speed, some residual stress was released due to the generated heat in the weld zone.

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“…A multiwalled carbon nanotube-based strain sensor is fabricated for structural health monitoring application [10]. The sensor is fabricated by mixing different amounts of MWCNT and epoxy resin (EpoThin ® ).…”

Section: The Present Issuementioning

confidence: 99%