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Double Network Hydrogel Sensors with High Sensitivity in Large Strain Range
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-08-24 , DOI: 10.1002/mame.202100486 Jingfei Zhang 1 , Wei Xue 2 , Yongqiang Dai 1 , Lian Wu 1 , Bing Liao 1 , Wei Zeng 1 , Xiaoming Tao 3
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-08-24 , DOI: 10.1002/mame.202100486 Jingfei Zhang 1 , Wei Xue 2 , Yongqiang Dai 1 , Lian Wu 1 , Bing Liao 1 , Wei Zeng 1 , Xiaoming Tao 3
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Owing to their preferable flexibility and facilitation to integrate with various apparel products, flexible sensors with high sensitivity are highly favored in the fields of environmental monitoring, health diagnosis, and wearable electronics. However, great challenges still remain in integrating high sensitivity with wide sensing range in one single flexible strain sensor. Herein, a new stretchable conductive gel-based sensor exhibiting remarkable properties regarding stretchability and sensitivity is developed via improving the ionic conductivity of the PVA/P(AM-AANa) double network hydrogel. Specifically, the strain sensor developed exhibits an excellent elongation of 549%, good fatigue resistance, and recovery performance. Simultaneously, the hydrogel strain sensor shows a high conductivity of 25 mS cm−1, fast response time of 360 ms, and a linear response (gauge factor = 4.75) to external strain (≈400%), which endow the sensor with accurate and reliable capacities to detect various human movements. Integrating the merits of flexibility, environment friendliness, and high sensitivity, the conductive gel-based sensor has promising application prospects in human–machine interfaces, touchpads, biosensors, electronic skin, wearable electronic devices, and so on.
中文翻译：
在大应变范围内具有高灵敏度的双网络水凝胶传感器
高灵敏度的柔性传感器由于其优越的灵活性和易于与各种服装产品的集成，在环境监测、健康诊断和可穿戴电子领域备受青睐。然而，在单个柔性应变传感器中集成高灵敏度和宽传感范围仍然存在巨大挑战。在此，通过提高 PVA/P(AM-AANa) 双网络水凝胶的离子电导率，开发了一种新型可拉伸导电凝胶传感器，该传感器在可拉伸性和灵敏度方面表现出卓越的性能。具体而言，开发的应变传感器表现出549%的优异伸长率、良好的抗疲劳性和恢复性能。同时，水凝胶应变传感器显示出 25 mS cm -1的高电导率, 360 ms 的快速响应时间，以及对外部应变 (≈400%) 的线性响应（应变系数 = 4.75），这使传感器具有准确可靠的能力来检测各种人体运动。基于导电凝胶的传感器集灵活性、环境友好性和高灵敏度等优点于一体，在人机界面、触摸板、生物传感器、电子皮肤、可穿戴电子设备等方面具有广阔的应用前景。
更新日期：2021-08-24
中文翻译：
在大应变范围内具有高灵敏度的双网络水凝胶传感器
高灵敏度的柔性传感器由于其优越的灵活性和易于与各种服装产品的集成，在环境监测、健康诊断和可穿戴电子领域备受青睐。然而，在单个柔性应变传感器中集成高灵敏度和宽传感范围仍然存在巨大挑战。在此，通过提高 PVA/P(AM-AANa) 双网络水凝胶的离子电导率，开发了一种新型可拉伸导电凝胶传感器，该传感器在可拉伸性和灵敏度方面表现出卓越的性能。具体而言，开发的应变传感器表现出549%的优异伸长率、良好的抗疲劳性和恢复性能。同时，水凝胶应变传感器显示出 25 mS cm -1的高电导率, 360 ms 的快速响应时间，以及对外部应变 (≈400%) 的线性响应（应变系数 = 4.75），这使传感器具有准确可靠的能力来检测各种人体运动。基于导电凝胶的传感器集灵活性、环境友好性和高灵敏度等优点于一体，在人机界面、触摸板、生物传感器、电子皮肤、可穿戴电子设备等方面具有广阔的应用前景。
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