Capacitive Sensors based on Recycled Carbon Fibre (rCF) Composites
Journal article
Authors | Ozioko, O., Odiyi, D., Diala, U., Akinbami, F., Emu, M. and Shafik, M. |
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Abstract | Recycled carbon fibre (rCF) composites are increasingly being explored for applications such as strain sensing, manufacturing of automobile parts, assistive technologies, and structural health monitoring, due to their properties, economic and environmental benefits. The high conductivity of carbon and its wide application for sensing, makes rCF very attractive for integrating sensing into passive structures. In this paper, capacitive sensors have been fabricated using rCF compo-sites of varying compositions. First, we investigated the suitability of recycled carbon fibre pol-ymer composites for different sensing applications. As a proof of concept, we fabricated five touch/proximity sensors and three soil moisture sensors, using recycled carbon fibre composites and their performances compared. The soil moisture sensors were realized using rCF as elec-trodes. This makes them corrosion-resistant and more environmental-friendly compared to conventional soil moisture sensors realized using metallic electrodes. The results of the touch/proximity sensing show an average change in capacitance (ΔC/C~34) for 20mm and (ΔC/C~5) for 100mm, distances of a hand, from the active sensing region. The results of the soil moisture sensors show a stable and repeatable response, with a high sensitivity of ~116pF/ml of water in the linear region. These results demonstrate their respective potential for touch/proximity sensing, as well as smart and sustainable agriculture. |
Keywords | Capacitive soil moisture sensor; Recycled carbon fibre composites; Capacitive touch sensors |
Year | 2024 |
Journal | Sensors |
Journal citation | 24 (14), p. 4731 |
Publisher | MDPI |
ISSN | 1424-8220 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/s24144731 |
Web address (URL) | https://www.mdpi.com/1424-8220/24/14/4731 |
Accepted author manuscript | License File Access Level Open |
Publisher's version | License File Access Level Open |
Output status | Published |
Publication dates | |
Online | 21 Jul 2024 |
Publication process dates | |
Accepted | 18 Jul 2024 |
Deposited | 29 Jul 2024 |
https://repository.derby.ac.uk/item/q78qz/capacitive-sensors-based-on-recycled-carbon-fibre-rcf-composites
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Accepted author manuscript
Capacitive Sensors Using rCF_UDORA.pdf | ||
License: CC BY 4.0 | ||
File access level: Open |
Publisher's version
Published.pdf | ||
License: CC BY 4.0 | ||
File access level: Open |
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