Efficient Heat Dissipation Performance of Multifunctional Wearable Pressure Sensors Based on Metal-Organic Framework...

Wearable pressure sensors have become essential for monitoring human health and facilitating human-machine interaction. However, pressure sensors generate heat during operation, which may reduce their service life and lead to localized burns due to overheating. To address these issues, we employ metal-organic frameworks (MOFs) to dope pressure sensors and investigate their effects on device performance. Here, wearable pressure sensors based on MOF/thermoplastic polyurethane/reduced graphene oxide (MOF/TPU/GAFF) are developed for rapid heat dissipation. We selected four MOFs with high thermal conductivity (Zr-MOF, Mn-MOF, MOF-5, and ZIF-8) and mixed them into a TPU/GAFF fiber film. The enhanced thermal conductivity of the modified TPU/GAFF matrix contributes to improved heat dissipation performance in the devices. Among the tested materials, the doped ZIF-8 composite film exhibits the most effective heat dissipation, with a heat exchange capacity 1.56 times higher than that of the undoped ZIF-8 composite film. Furthermore, the incorporation of ZIF-8 significantly enhances sensor sensitivity. The ZIF-8-based sensor demonstrates optimal performance, achieving a sensitivity of 0.27 kPa^-1 within the pressure range of 0-50 kPa, representing a 595.2% improvement compared to the sensor without ZIF-8. Overall, the sensor provides a wearable electronic platform with strong application potential in monitoring human health and speech recognition.