Environment-Resistant Organohydrogel-Based Sensor Enables Highly Sensitive Strain, Temperature, and Humidity Responses

• DOI: 10.1021/acsami.2c02997
• Publication Date: 2022-05-10T14:04:00Z
• Authors: Chengcheng Cai; Chiyu Wen; Weiqiang Zhao; Shu Tian; You Long; Xiangyu Zhang; Xiaojie Sui; Lei Zhang; Jing Yang
• Keywords: Gauge factor

Conductive hydrogels have been extensively used in wearable skin sensors owing to their outstanding flexibility, tissuelike compliance, and biocompatibility. However, the dehydration embrittlement of can result sensitivity loss or even invalidation, restraining applications external environments, especially at low temperatures arid environments. Herein, an environment-resistant organohydrogel is developed for multifunctional sensors. A double-network based on hyaluronic acid poly(acrylic acid-co-acrylamide) developed, glycerol introduced into network via a solvent displacement strategy. Owing water-locking effects tough polymeric backbone, resultant not only exhibits stable tensibility but also maintains excellent flexibility conductivity with properties, including freezing resistance against −30 °C moisture retention 4% relative humidity high temperature 60 °C. Moreover, series organohydrogel-based array device are achieve highly sensitive strain, temperature, responses exhibit gauge factor 10.79 strain-sensitive test. This work develops universal ionic organohydrogels be applied health monitoring.