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Highly stretchable, sensitive and healable polyurethane-urea/graphene nanocomposite sensor for multifunctional applications
https://orcid.org/0000-0002-6676-7779
Highlights Graphene nanoplatelets were prepared by a mechanochemistry method. Stretchable polyurethane-urea nanocomposites were developed as sensing materials. A sensor revealed a strain sensitivity of 17.57. A sensor was designed to simultaneously acquire temperature and strain signals. The healing efficiency for sensitivity of up to 70.46 %.
Abstract Flexible wearable electronic devices offer promising potential for monitoring physiological signals. However, creating a single sensor that integrates high tensile strength, sensitivity, self-healing capabilities and a wide working range presents a significant and multifaceted challenge. This study reports a novel nanocomposite consisting of polyurethane-urea elastomer (PUU) and graphene nanoplatelets (E-GNPs) that are mechanochemically modified with diethyltoluene diamine ethacure 100. A low electrical percolation threshold was observed at 4.17 vol% E-GNPs. The sensor based on the PUU nanocomposite at 7 vol% of E-GNPs has revealed a gauge factor up to 17.57 and a wide working range of 361.76 % with high tensile strength of 19.73 MPa. It can withstand 20,000 cycles at 50 % strain. The sensor exhibits negative temperature dependence at 20–100 °C, with a resolution of 0.01/°C at 36–40 °C. Treatments with solvents and heat enable a healing efficiency for sensitivity of up to 70.46 %. The healable sensor enables real-time monitoring of temperature and strain signals, making it ideal for wearable devices in human health and sports monitoring.
Graphical abstract Display Omitted
Highly stretchable, sensitive and healable polyurethane-urea/graphene nanocomposite sensor for multifunctional applications
https://orcid.org/0000-0002-6676-7779
Highlights Graphene nanoplatelets were prepared by a mechanochemistry method. Stretchable polyurethane-urea nanocomposites were developed as sensing materials. A sensor revealed a strain sensitivity of 17.57. A sensor was designed to simultaneously acquire temperature and strain signals. The healing efficiency for sensitivity of up to 70.46 %.
Abstract Flexible wearable electronic devices offer promising potential for monitoring physiological signals. However, creating a single sensor that integrates high tensile strength, sensitivity, self-healing capabilities and a wide working range presents a significant and multifaceted challenge. This study reports a novel nanocomposite consisting of polyurethane-urea elastomer (PUU) and graphene nanoplatelets (E-GNPs) that are mechanochemically modified with diethyltoluene diamine ethacure 100. A low electrical percolation threshold was observed at 4.17 vol% E-GNPs. The sensor based on the PUU nanocomposite at 7 vol% of E-GNPs has revealed a gauge factor up to 17.57 and a wide working range of 361.76 % with high tensile strength of 19.73 MPa. It can withstand 20,000 cycles at 50 % strain. The sensor exhibits negative temperature dependence at 20–100 °C, with a resolution of 0.01/°C at 36–40 °C. Treatments with solvents and heat enable a healing efficiency for sensitivity of up to 70.46 %. The healable sensor enables real-time monitoring of temperature and strain signals, making it ideal for wearable devices in human health and sports monitoring.
Graphical abstract Display Omitted
Highly stretchable, sensitive and healable polyurethane-urea/graphene nanocomposite sensor for multifunctional applications
https://orcid.org/0000-0002-6676-7779
Highlights Graphene nanoplatelets were prepared by a mechanochemistry method. Stretchable polyurethane-urea nanocomposites were developed as sensing materials. A sensor revealed a strain sensitivity of 17.57. A sensor was designed to simultaneously acquire temperature and strain signals. The healing efficiency for sensitivity of up to 70.46 %.
Abstract Flexible wearable electronic devices offer promising potential for monitoring physiological signals. However, creating a single sensor that integrates high tensile strength, sensitivity, self-healing capabilities and a wide working range presents a significant and multifaceted challenge. This study reports a novel nanocomposite consisting of polyurethane-urea elastomer (PUU) and graphene nanoplatelets (E-GNPs) that are mechanochemically modified with diethyltoluene diamine ethacure 100. A low electrical percolation threshold was observed at 4.17 vol% E-GNPs. The sensor based on the PUU nanocomposite at 7 vol% of E-GNPs has revealed a gauge factor up to 17.57 and a wide working range of 361.76 % with high tensile strength of 19.73 MPa. It can withstand 20,000 cycles at 50 % strain. The sensor exhibits negative temperature dependence at 20–100 °C, with a resolution of 0.01/°C at 36–40 °C. Treatments with solvents and heat enable a healing efficiency for sensitivity of up to 70.46 %. The healable sensor enables real-time monitoring of temperature and strain signals, making it ideal for wearable devices in human health and sports monitoring.
Graphical abstract Display Omitted
Highly stretchable, sensitive and healable polyurethane-urea/graphene nanocomposite sensor for multifunctional applications
Yu, Yin (Autor:in) / Xu, Zhaoyang (Autor:in) / Xu, Lisheng (Autor:in) / Li, Yikuan (Autor:in) / Liu, Tianqing (Autor:in) / Meng, Qingshi (Autor:in) / Su, Xiao (Autor:in) / Kuan, Hsu-Chiang (Autor:in) / Dai, Jiabin (Autor:in) / Ma, Jun (Autor:in)
Thin-Walled Structures ; 198
29.01.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| Elsevier | 2024