High-Stretchability, Ultralow-Hysteresis ConductingPolymer Hydrogel Strain Sensors for Soft Machines,Advanced Materials

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High-Stretchability, Ultralow-Hysteresis ConductingPolymer Hydrogel Strain Sensors for Soft Machines
Advanced Materials ( IF 27.4 ) Pub Date : 2022-06-20 , DOI: 10.1002/adma.202203650
Zequn Shen _{1,

2} , Zhilin Zhang ₃ , Ningbin Zhang _{1,

2} , Jinhao Li _{1,

2} , Peiwei Zhou _{1,

2} , Faqi Hu ₃ , Yu Rong _{1,

2} , Baoyang Lu ₃ , Guoying Gu _{1,

2,

4}

Affiliation

Highly stretchable strain sensors based on conducting polymer hydrogel are rapidly emerging as a promising candidate toward diverse wearable skins and sensing devices for soft machines. However, due to the intrinsic limitations of low stretchability and large hysteresis, existing strain sensors cannot fully exploit their potential when used in wearable or robotic systems. Here, a conducting polymer hydrogel strain sensor exhibiting both ultimate strain (300%) and negligible hysteresis (<1.5%) is presented. This is achieved through a unique microphase semiseparated network design by compositing poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) nanofibers with poly(vinyl alcohol) (PVA) and facile fabrication by combining 3D printing and successive freeze-thawing. The overall superior performances of the strain sensor including stretchability, linearity, cyclic stability, and robustness against mechanical twisting and pressing are systematically characterized. The integration and application of such strain sensor with electronic skins are further demonstrated to measure various physiological signals, identify hand gestures, enable a soft gripper for objection recognition, and remote control of an industrial robot. This work may offer both promising conducting polymer hydrogels with enhanced sensing functionalities and technical platforms toward stretchable electronic skins and intelligent robotic systems.

中文翻译：

用于软机械的高拉伸性、超低滞后导电聚合物水凝胶应变传感器

基于导电聚合物水凝胶的高度可拉伸应变传感器正迅速成为各种可穿戴皮肤和软机器传感设备的有希望的候选者。然而，由于低拉伸性和大滞后的内在限制，现有的应变传感器在可穿戴或机器人系统中使用时无法充分发挥其潜力。在这里，提出了一种导电聚合物水凝胶应变传感器，该传感器同时表现出极限应变 (300%) 和可忽略的滞后 (<1.5%)。这是通过将聚 (3,4-乙烯二氧噻吩): 聚苯乙烯磺酸盐 (PEDOT:PSS) 纳米纤维与聚乙烯醇 (PVA) 复合而成的独特微相半分离网络设计实现的，并通过结合 3D 打印和连续冻融来轻松制造. 系统地表征了应变传感器的整体优越性能，包括可拉伸性、线性度、循环稳定性以及对机械扭曲和挤压的鲁棒性。进一步展示了这种应变传感器与电子皮肤的集成和应用，以测量各种生理信号、识别手势、实现物体识别的软抓手和工业机器人的远程控制。这项工作可以提供具有增强传感功能的有前途的导电聚合物水凝胶，以及可拉伸电子皮肤和智能机器人系统的技术平台。进一步展示了这种应变传感器与电子皮肤的集成和应用，以测量各种生理信号、识别手势、实现物体识别的软抓手和工业机器人的远程控制。这项工作可以提供具有增强传感功能的有前途的导电聚合物水凝胶，以及可拉伸电子皮肤和智能机器人系统的技术平台。进一步展示了这种应变传感器与电子皮肤的集成和应用，以测量各种生理信号、识别手势、实现物体识别的软抓手和工业机器人的远程控制。这项工作可以提供具有增强传感功能的有前途的导电聚合物水凝胶，以及可拉伸电子皮肤和智能机器人系统的技术平台。

更新日期：2022-06-20

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