Soft, Stretchable, and Conductive Hydrogel Based on Liquid Metal for Accurately Facial Expression Monitoring,Advanced Materials Technologies

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Soft, Stretchable, and Conductive Hydrogel Based on Liquid Metal for Accurately Facial Expression Monitoring
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2023-06-21 , DOI: 10.1002/admt.202300406
Haiyang Qin _{1,

2} , Mengmeng Sun _{1,

2} , Peiyi Li _{1,

2} , Junye Li ₃ , Zhilin Zhang ₄ , Shuqi Dai ₅ , Mingjun Huang ₅ , Baoyang Lu ₄ , Xiaofang Pan ₃ , Lidong Wu _{1,

2}

Affiliation

Soft electronics have emerged as a prominent research domain, with diverse applications from medical monitoring to soft robotics. Liquid metal (LM) has emerged as a promising material for soft electronics due to its high electrical conductivity (3.4 × 10⁶ S m⁻¹) and fluidity at room temperature. However, the dispersion of LM nanoparticles and the performance of LM composites in soft electronics applications have not been extensively explored. In this study, a novel approach for the direct dispersion of LM nanoparticles in biocompatible hyaluronic acid (HA) to create multifunctional LM/HA hydrogels is presented. The LM/HA hydrogel displays remarkable electromechanical properties, including high stretchability (2,700%) and conductivity (116 S m⁻¹), as well as excellent sensitivity (GF = 4.8) as a sensing material. Specifically, a facial expression monitoring system is developed utilizing the LM/HA hydrogel as the sensing material, along with a microcontroller, signal-processing circuits, and a Bluetooth transceiver. The LM/HA hydrogel adheres closely to the skin surface to ensure the accuracy of facial expression monitoring. In summary, this study not only advances the understanding of the properties of LM but also expands the potential application scenarios of multifunctional LM hydrogels in soft robotics and implantable sensors.

中文翻译：

基于液态金属的柔软、可拉伸、导电的水凝胶，用于精确的面部表情监测

软电子学已成为一个重要的研究领域，具有从医疗监测到软机器人的多种应用。液态金属（LM）由于其高电导率（3.4 × 10 6 ^S m ^-1）和室温下的流动性，已成为一种有前途的软电子材料。然而，LM纳米粒子的分散性和LM复合材料在软电子应用中的性能尚未得到广泛探索。在这项研究中，提出了一种将 LM 纳米粒子直接分散在生物相容性透明质酸 (HA) 中以创建多功能 LM/HA 水凝胶的新方法。LM/HA 水凝胶表现出卓越的机电性能，包括高拉伸性 (2,700%) 和电导率 (116 S m ⁻¹），以及作为传感材料的优异灵敏度（GF = 4.8）。具体来说，利用 LM/HA 水凝胶作为传感材料，以及微控制器、信号处理电路和蓝牙收发器开发了面部表情监测系统。LM/HA水凝胶紧密贴合皮肤表面，保证面部表情监测的准确性。总之，这项研究不仅增进了对LM特性的理解，而且拓展了多功能LM水凝胶在软机器人和植入式传感器中的潜在应用场景。

更新日期：2023-06-21

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