Superhydrophobic, Anti-Freezing and Multi-Cross-Linked Wearable Hydrogel Strain Sensor for Underwater Gesture Recognition,ACS Sensors

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Superhydrophobic, Anti-Freezing and Multi-Cross-Linked Wearable Hydrogel Strain Sensor for Underwater Gesture Recognition
ACS Sensors ( IF 8.2 ) Pub Date : 2024-08-28 , DOI: 10.1021/acssensors.4c00799
Yubing Liu ₁ , He Yu ₁ , Guanya Zhou ₁ , Mugen Peng ₁

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Conductive hydrogel is considered to be one of the most potential sensing materials for wearable strain sensors. However, both the hydrophilicity of polymer chains and high water content severely inhibit the potential applications of hydrogel-based sensors in extreme conditions. In this study, a multicross-linked hydrogel was prepared by simultaneously introducing a double-network matrix, multiple conductive fillers, and free-moving ions, which can withstand an ultralow temperature below −80 °C. A superhydrophobic Ecoflex layer with a water contact angle of 159.1° was coated on the hydrogel using simple spraying and laser engraving methods. Additionally, the smart glove integrating five hydrogel strain sensors with a microprocessor was developed to recognize 12 types of diving gestures and synchronously transmit recognition results to smartphones. The superhydrophobic and antifreezing hydrogel strain sensor proposed in this study emerges promising potentials in wearable electronics, human-machine interfaces, and underwater applications.

中文翻译：

用于水下手势识别的超疏水、防冻、多交联可穿戴水凝胶应变传感器

导电水凝胶被认为是可穿戴应变传感器最有潜力的传感材料之一。然而，聚合物链的亲水性和高含水量严重抑制了基于水凝胶的传感器在极端条件下的潜在应用。在这项研究中，通过同时引入双网络基质、多种导电填料和自由移动离子制备了多重交联水凝胶，该水凝胶可以承受-80℃以下的超低温。使用简单的喷涂和激光雕刻方法将水接触角为159.1°的超疏水Ecoflex层涂覆在水凝胶上。此外，还开发了集成五个水凝胶应变传感器和微处理器的智能手套，可以识别12种潜水手势，并将识别结果同步传输到智能手机。本研究提出的超疏水和防冻水凝胶应变传感器在可穿戴电子产品、人机界面和水下应用中展现出广阔的前景。

更新日期：2024-08-28

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