A Dual‐Mode Wearable Sensor Based on Bacterial Cellulose Reinforced Hydrogels for Highly Sensitive Strain/Pressure Sensing,Advanced Electronic Materials

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A Dual‐Mode Wearable Sensor Based on Bacterial Cellulose Reinforced Hydrogels for Highly Sensitive Strain/Pressure Sensing
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2019-12-03 , DOI: 10.1002/aelm.201900934
Jieyu Huang ₁ , Min Zhao ₁ , Yibing Cai ₁ , Malgorzata Zimniewska ₂ , Dawei Li ₁ , Qufu Wei _{1,

3}

Affiliation

Flexible and wearable sensors are fast establishing their status as go‐to devices for human motion detection. A bacterial cellulose‐reinforced hydrogel is fabricated through a facile and scalable freezing–thawing process with Ca²⁺ crosslinking for strain and pressure sensing. Polyvinyl alcohol/sodium alginate/bacterial cellulose/modified carbon nanotube and carbon black hydrogels assembled as piezoresistive strain sensors and capacitive pressure sensors exhibit an excellent synchronicity between mechanical load and electrical signal, good stability under various strains and pressures, an ability to distinguish strains and pressures, and extraordinary cycling repeatability and durability during loading/unloading process. Moreover, the dual‐mode sensor can be used for monitoring human motion, such as limb movement, walking, and grasping weights, suggesting its great potential in flexible and wearable devices.

中文翻译：

基于细菌纤维素增强水凝胶的双模式可穿戴式传感器，可实现高度灵敏的应变/压力传感

柔性和可穿戴传感器正在迅速确立其作为人体运动检测必不可少的设备的地位。细菌纤维素增强水凝胶是通过使用Ca ^{2+进行的快速}，可扩展的冻融过程制造的交联用于应变和压力传感。组装成压阻应变传感器和电容压力传感器的聚乙烯醇/藻酸钠/细菌纤维素/改性碳纳米管和炭黑水凝胶在机械负载和电信号之间表现出出色的同步性，在各种应变和压力下均具有良好的稳定性，能够分辨应变和压力，以及在装卸过程中出色的循环重复性和耐用性。此外，双模式传感器可用于监视人体运动，例如肢体运动，行走和抓握重量，这表明它在柔性和可穿戴设备中具有巨大的潜力。

更新日期：2020-01-13

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