Wearable and self-healable textile-based strain sensors to monitor human muscular activities
| Autor: | Giulia Spallanzani, Athanassia Athanassiou, Simeone Dussoni, Roberto Donno, Marco Maggiali, Muhammad Zahid, Arkadiusz Zych |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science Polydimethylsiloxane Carbon nanofiber Mechanical Engineering 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Working range Thermoplastic polyurethane chemistry.chemical_compound chemistry Mechanics of Materials Gauge factor Ceramics and Composites Polyethylene terephthalate Composite material 0210 nano-technology Sheet resistance |
| Zdroj: | Composites Part B: Engineering. 220:108969 |
| ISSN: | 1359-8368 |
| DOI: | 10.1016/j.compositesb.2021.108969 |
| Popis: | In this study, a textile-based wearable strain sensor is fabricated to monitor human muscular activities with high sensitivity and large working range. To achieve electrical conductivity, a gum-like sticky polyvinyl acetate-co-vinyl laurate polymer (commercial name: VINNAPASS) is mixed with 50 wt % of carbon nanofiber (CNFs) using ethyl acetate as co-solvent. The VINNAPASS/CNFs-based ink is spray coated onto a stretchable polyethylene terephthalate fabric (commercial name: Lycra) and subsequently covered and stabilized with polydimethylsiloxane protective layer. Another reference sensor is also prepared using thermoplastic polyurethane (TPU) with equal concentration of CNFs. The strain sensor made with VINNAPASS demonstrated sheet resistance, maximum elongation at break, gauge factor (GF) and working range of 32.27 ± 1.60 Ω/□, 230 ± 6%, 67.12, >170% as compared to 48.44 ± 2.33 Ω/□, 122 ± 7%, 39.97 and ~100% for the sensor made with TPU, respectively. Moreover, the VINAPASS-based strain sensor displayed complete self-healing and >90% reversible electrical properties on damage, while the TPU-based sensor was not healable. Finally, the VINNAPASS-based sensor is used to monitor folding-unfolding of human finger and wrist as well as bicep muscle contraction and relaxation, and is envisioned for monitoring human muscular motions during physical activities and exercising. |
| Databáze: | OpenAIRE |
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