| Effect of temperature on the bending fatigue of flexible PDMS/MXene pressure sensor with cilia array |
Yong-Wang Sun1, Hai-Jiao Men1, Zhe Zhang1, Jian-Chang Li1
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1Vacuum and Fluid Engineering Research Center, School of Mechanical
2Engineering & Automation, Northeastern University, Shenyang, 110819, People’s Republic of China |
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Received: October 12, 2024; Revised: November 10, 2024 Accepted: December 10, 2024. Published online: July 10, 2024. |
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| ABSTRACT |
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The cilia array structure can effectively improve the sensitivity of the flexible polydimethylsiloxane (PDMS)/Ti3C2 (MXene) pressure sensor, of which the bending stability is strongly temperature-dependent. Herein, the effect of temperature on the bending fatigue of the flexible PDMS/MXene pressure sensor with a cilia array is systematically investigated. The sensor shows little performance degradation after bending 10,000 cycles above 0 °C, however, the bending fatigue tolerance is significantly deteriorated below 0 °C. The finite element and theoretical calculation results indicate that the competition between the hydrogen bond network and strain energy accumulation at the PDMS/MXene interface is the key factor for the bending fatigue endurance. At a temperature above 0 °C, the interfacial energy dissipation by PDMS can alleviate the destruction degree of the hydrogen bond network. As the temperature decreasing below 0 °C, the poor energy dissipation capacity of PDMS accelerates the breakage of the hydrogen bond network and thus further deteriorates the sensor bending endurance. |
| Key words:
Pressure sensor · Cilia array · Bending fatigue · Temperature-dependent · Hydrogen bond |
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