High Sensitive Nitrogen Dioxide Sensor Based on Polyvinyl Alcohol-Cellulose Nanofibril Organohydrogel with Repairability, Anti-Freezing, Stretchability, Long-Lasting Moisture, and High Strength

2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers) Pub Date : 2021-06-20 DOI:10.1109/Transducers50396.2021.9495684

Zijing Zhou, Yuning Liang, Wenxi Huang, Bizhang Zhong, Jindong Ye, K. Tao, Jin Wu

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Abstract

Fabrication of stretchable sensor has been increasingly attractive for emerging wearable applications in health assessment, internet-of-things, electronic skin, robotics, and environment monitoring. Nitrogen dioxide (NO2) is one of the most harmful gases to the human body and environment. Here, we demonstrate a novel high-sensitivity (233%/ppm) NO2 gas sensor based on polyvinyl alcohol (PV A)-cellulose nanofibril (CNF) organohydrogel. This organohydrogel exhibits remarkable stretchability (break strain 672%), and high mechanical strength (up to more than 370 KPa). Besides, the PVA-CNF organohydrogels remained in their original condition without any damage on the surface after stretching 15 times. Basing on the crosslinked hydrogen bond, this PV A-CNF organohydrogel exhibits repairability and remoldability. The addition of glycerol increases the antifreezing ability and long-lasting moisture.

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基于聚乙烯醇-纤维素纳米纤维有机水凝胶的高灵敏度二氧化氮传感器，具有可修复性、抗冻性、可拉伸性、持久防潮性和高强度

可伸缩传感器的制造在健康评估、物联网、电子皮肤、机器人和环境监测等新兴可穿戴应用中越来越有吸引力。二氧化氮(NO2)是对人体和环境危害最大的气体之一。在这里，我们展示了一种基于聚乙烯醇(PV a)-纤维素纳米纤维(CNF)有机水凝胶的新型高灵敏度(233%/ppm) NO2气体传感器。该有机水凝胶具有显著的拉伸性(断裂应变672%)和高机械强度(高达370 KPa以上)。此外，PVA-CNF有机水凝胶在拉伸15次后仍保持原状，表面无任何损伤。基于交联氢键，该PV - A-CNF有机水凝胶具有可修复性和可重塑性。甘油的加入增加了抗冻能力和持久的水分。

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2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)

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