高灵敏度,超宽响应范围,环境耐受性高的多模式离子凝胶基传感器

Highly sensitive,durable,environmentally tolerant and multimodal composite ionogel-based sensor with an ultrawide response range

近年来,离子类皮肤传感器因其高性能和良好的兼容性等优点而备受关注.然而,开发一种多功能、稳定、高灵敏度和耐用的离子类皮肤传感器仍面临挑战.本文通过简单的紫外引发聚合制备了具有良好耐用性、环境(抗冻、耐真空)稳定性、离子导电性、自愈性、高粘附性和拉伸性的复合离子凝胶.该离子凝胶可以组装为应变、压力和温度传感器,用于检测外部环境的变化.无论是作为应变传感器还是压力传感器,离子凝胶基传感器都具有高灵敏度(GF=14.7)、宽响应范围(1%-1600%)、快速响应时同(95.8 ms)、优异的稳定性和可重复性(1000次).因此,它不仅可以追踪关节运动,还可以监测细微的表情变化(皱眉).该离子凝胶还可以组装成敲击传感器和高精度书写板传感器,用于信息传递.此外,该传感器对温度变化具有较高的灵敏度,温度感知范围在0-120℃之间,且检测阈值较低(0.1℃).因此,基于离子凝胶的传感器有望应用于多功能电子和传感设备.

In recent years,skin-like ionic sensors have attracted considerable attention due to their excellent performance,feasibility,and biocompatibility.However,developing a multifunctional,stable,durable,highly sensitive skinlike ionic sensor is a challenge.Herein,a composite ionogel with good durability,environmental tolerance(freezing and vacuum resistance),ionic conductivity,self-healing capability,high adhesion and stretchability was fabricated via a simple UV initiated polymerization.The ionogel could be easily assembled into strain,pressure,and temperature sensors for detecting changes in the external environment.In strain and pressure sensing tests,the ionogel-based sensor exhibited high sensitivity(gauge factor GF=14.7),a wide response range(1%–1600%),rapid response time(95.8 ms),high stability,and repeatability(50%for 1000 cycles).Therefore,it could trace not only wide joint movements but also subtle changes in facial expressions(frowning).The sensor could also be assembled into a knock sensor and a high-precision touch pad sensor for message transmission.The ionogel-based sensor exhibited high sensitivity to temperature variations from 0 to 120°C and a low detection threshold(0.1°C).Thus,the proposed ionogel-based sensor has enormous potential in multifunctional electronic and sensory device applications.