Stretchable, Antifreezing, Non-Drying, and Fast-Response Sensors Based on Cellulose Nanocomposite Hydrogels for Signal Detection,Macromolecular Materials and Engineering

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Stretchable, Antifreezing, Non-Drying, and Fast-Response Sensors Based on Cellulose Nanocomposite Hydrogels for Signal Detection
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-09-15 , DOI: 10.1002/mame.202100549
Wei Zhang ₁ , Chang Ma ₁ , Ling‐Zhi Huang ₁ , Wen‐Yan Guo ₁ , Dan‐Dan Li ₁ , Jing Bian ₁ , Ming‐Guo Ma ₁

Affiliation

Conductive hydrogels have received widespread attention in the applications of biosensors, human–machine interface, and health recording electrodes. Herein, the conductive hydrogels integrated with antifreezing, water retention, reusable, and sensing performances are fabricated by introducing polyvinyl alcohol, cellulose nanofibril, MXene nanosheets, and glycerol. The as-prepared hydrogels present prominent electrical conductivity (2.58 mS cm⁻¹) and flexibility even at −18 °C. In addition, the hydrogels have favorable water retention performance and can reuse after heating and cooling. When used as sensors, the hydrogels illustrate high sensitivity (gauge factor of 2.30), fast response time (0.165 s), wide working strain range (559%), favorable linearity (R² = 0.999), and wide operating temperature range (−18 to 60 °C). The hydrogels can detect not only large strains of 10–200%, but also small strains of 1–5%, making them promising candidates for wearable sensors to monitor large and subtle movements.

中文翻译：

用于信号检测的基于纤维素纳米复合水凝胶的可拉伸、防冻、不干燥和快速响应的传感器

导电水凝胶在生物传感器、人机界面和健康记录电极的应用中受到广泛关注。在此，通过引入聚乙烯醇、纤维素纳米原纤维、MXene 纳米片和甘油制备了集防冻、保水、可重复使用和传感性能于一体的导电水凝胶。所制备的水凝胶即使在-18°C 下也具有显着的导电性（2.58 mS cm ^-1）和柔韧性。此外，该水凝胶具有良好的保水性能，可在加热和冷却后重复使用。当用作传感器时，水凝胶表现出高灵敏度（应变系数为 2.30）、快速响应时间（0.165 秒）、宽工作应变范围（559%）、良好的线性（R ² = 0.999)，以及宽广的工作温度范围（−18 至 60 °C）。水凝胶不仅可以检测 10-200% 的大应变，还可以检测 1-5% 的小应变，使它们成为可穿戴传感器监测大而细微运动的有希望的候选者。

更新日期：2021-09-15

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