Temperature sensors have great potential applications for the body temperature monitoring, it's a big challenge to prepare sensors with high sensitivity and maintaining adaptive properties for the long-term applications. In this study, an organohydrogel for the temperature sensor is achieved via glycerol solvent replacement of water in the poly-N-acryloyl glycinamide (PNAGA)/carrageenans double network (DN) hydrogel. Owing to successful construction of strong multiple hydrogen bonding (H-bonding) interactions among PNAGA chains and carrageenans, the PNAGA-based glycerol gel (Gly-gel) sensor exhibits excellent thermal stabilities, possesses high sensitivities (2% °C) resulted from the acceleration of mobility of ions at high temperature and shows high tensile strength of about 4 MPa without chemical crosslinkers (higher than most reported organohydrogel-based temperature sensor) with self-healable performance. In addition, the double network of Gly-gel enables it excellent dual and triple shape memory performance with high fixing ratio (R_f, 88%), recovery ratio (R_r, 95%) under large deformations (above 80%) that are beneficial to the potential application in wearable devices. Different from previous temperature sensors, this work provides a facile approach to prepare overly sensitive temperature sensors with the combination of excellent thermal stability, high tensile strength and adaptive properties via the solvent replacement of hydrogel.

中文翻译：

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双网络甘油凝胶：一种坚固、高灵敏度和自适应的温度传感器

温度传感器在体温监测方面具有巨大的潜在应用，制备具有高灵敏度和长期应用的自适应特性的传感器是一个很大的挑战。在这项研究中，温度传感器的有机水凝胶是通过甘油溶剂替代聚N 中的水来实现的。-丙烯酰甘氨酰胺（PNAGA）/角叉菜胶双网络（DN）水凝胶。由于成功构建了 PNAGA 链和角叉菜胶之间的强多重氢键 (H-键) 相互作用，基于 PNAGA 的甘油凝胶 (Gly-gel) 传感器表现出优异的热稳定性，具有高灵敏度 (2% °C)离子在高温下的迁移加速，并在没有化学交联剂的情况下显示出约 4 MPa 的高拉伸强度（高于大多数报道的基于有机水凝胶的温度传感器），具有自愈性能。此外，Gly-gel 的双网络使其具有优异的双重和三重形状记忆性能，具有高固定率 ( R _f , 88%)、恢复率 ( R _r, 95%) 在大变形（80% 以上）下有利于可穿戴设备的潜在应用。与以前的温度传感器不同，这项工作提供了一种简便的方法来制备具有优异热稳定性、高拉伸强度和适应性特性的过度敏感的温度传感器，通过水凝胶的溶剂替代。