Kallingal Nithusha, Maurya Muni Raj, Sajna M S, Yalcin Huseyin Cagatay, Ouakad Hassen M, Bahadur Issam, Al-Maadeed Somaya, Sadasivuni Kishor Kumar
Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar.
Department of Mechanical and Industrial Engineering, Qatar University, P.O. Box 2713, Doha, Qatar.
3 Biotech. 2022 Aug;12(8):171. doi: 10.1007/s13205-022-03221-3. Epub 2022 Jul 13.
Wearable sensors have drawn considerable interest in the recent research world. However, simultaneously realizing high sensitivity and wide detection limits under changing surrounding environment conditions remains challenging. In the present study, we report a wearable piezoresistive pressure sensor capsule that can detect pulse rate and human motion. The capsule includes a flexible silicon cover and is filled with different PVA/MXene (PVA-Mx) composites by varying the weight percentage of MXene in the polymer matrix. Different characterizations such as XRD, FTIR and TEM results confirm that the PVA-Mx silicon capsule was successfully fabricated. The PVA-Mx gel-based sensor capsule remarkably endows a low detection limit of 2 kPa, exhibited high sensitivity of 0.45 kPa in the ranges of 2-10 kPa, and displayed a response time of ~ 500 ms, as well as good mechanical stability and non-attenuating durability over 500 cycles. The piezoresistive sensor capsule sensor apprehended great stability towards changes in humidity and temperature. These findings substantiate that the PVA/MXene sensor capsule is potentially suitable for wearable electronics and smart clothing.
可穿戴传感器在最近的研究领域引起了相当大的关注。然而，在不断变化的周围环境条件下同时实现高灵敏度和宽检测限仍然具有挑战性。在本研究中，我们报道了一种可检测脉搏率和人体运动的可穿戴压阻式压力传感器胶囊。该胶囊包括一个柔性硅盖，并通过改变聚合物基质中MXene的重量百分比填充不同的PVA/MXene（PVA-Mx）复合材料。XRD、FTIR和TEM等不同表征结果证实成功制备了PVA-Mx硅胶囊。基于PVA-Mx凝胶的传感器胶囊显著具有2 kPa的低检测限，在2-10 kPa范围内表现出0.45 kPa的高灵敏度，响应时间约为500 ms，并且在500次循环中表现出良好的机械稳定性和无衰减耐久性。压阻式传感器胶囊对湿度和温度变化具有很高的稳定性。这些发现证实PVA/MXene传感器胶囊潜在适用于可穿戴电子产品和智能服装。
