用于可穿戴和自供电温度-压缩应变双参数传感的废棉纤维热电气凝胶

工程（英文） ›› 2024, Vol. 39 ›› Issue (8) : 250 -258. DOI: 10.1016/j.eng.2024.01.015

研究论文

何昕阳 ^a ,
刘明远 ^a ,
蔡佳欣 ^a ,
李臻 ^a ,
滕志霖 ^a ,
郝云娜 ^a ,
崔一帆 ^b ,
俞建勇 ^c ,
王黎明 ^a^,^* ,
覃小红 ^a^,^*

作者信息 +

Waste Cotton-Derived Fiber-Based Thermoelectric Aerogel for Wearable and Self-Powered Temperature-Compression Strain Dual-Parameter Sensing

Xinyang He ^a^,^# ,
Mingyuan Liu ^a^,^# ,
Jiaxin Cai ^a ,
Zhen Li ^a ,
Zhilin Teng ^a ,
Yunna Hao ^a ,
Yifan Cui ^b ,
Jianyong Yu ^c ,
Liming Wang ^a^,^* ,
Xiaohong Qin ^a^,^*

Author information +

文章历史 +

Received	Accepted	Published
2023-07-23	2024-01-02
Issue Date
2024-06-14

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摘要

随着全球经济的快速发展和人口的增长，废旧纺织品的数量急剧增加。这不仅造成了有限资源的浪费，还因不当处置引发了严重的环境污染问题。因此，探索将废弃纺织品转化为高附加值产品（如智能可穿戴设备）具有重要的现实意义。本研究提出了一种创新的一步冻干工艺，将废棉织物转化为三维弹性纤维基热电气凝胶。该气凝胶具备解耦的自供电温度-压缩应变双参数传感功能，其压缩响应时间仅为0.2 s，塞贝克系数达到43 μV∙K^-1，导热系数低于0.04 W∙m^-1∙K^-1。通过三甲氧基（甲基）硅烷（MTMS）与纤维素的交联，气凝胶表现出优异的弹性，适用于猜谜游戏和面部表情识别等压缩应变传感应用。此外，基于热电效应，气凝胶可在自供电模式下通过输出热电压实现温度检测与区分。进一步将气凝胶阵列设备与无线传输模块集成，可构建可穿戴系统，在手机应用程序中实现温度警报功能，且不受抓握过程中压缩应变的信号干扰。这一策略不仅对缓解全球环境污染具有深远意义，还为废旧纺织品向高附加值智能可穿戴产品的转化提供了创新思路。

Abstract

The rapid development of the global economy and population growth are accompanied by the production of numerous waste textiles. This leads to a waste of limited resources and serious environmental pollution problems caused by improper disposal. The rational recycling of wasted textiles and their transformation into high-value-added emerging products, such as smart wearable devices, is fascinating. Here, we propose a novel roadmap for turning waste cotton fabrics into three-dimensional elastic fiber-based thermoelectric aerogels by a one-step lyophilization process with decoupled self-powered temperature-compression strain dual-parameter sensing properties. The thermoelectric aerogel exhibits a fast compression response time of $0.2 s$ , a relatively high Seebeck coefficient of $43 μ V ⋅ K - 1$ , and an ultralow thermal conductivity of less than $0.04 W ⋅ m - 1 ⋅ K - 1$ . The cross-linking of trimethoxy(methyl)silane (MTMS) and cellulose endowed the aerogel with excellent elasticity, allowing it to be used as a compressive strain sensor for guessing games and facial expression recognition. In addition, based on the thermoelectric effect, the aerogel can perform temperature detection and differentiation in self-powered mode with the output thermal voltage as the stimulus signal. Furthermore, the wearable system, prepared by connecting the aerogel-prepared array device with a wireless transmission module, allows for temperature alerts in a mobile phone application without signal interference due to the compressive strains generated during gripping. Hence, our strategy is significant for reducing global environmental pollution and provides a revelatory path for transforming waste textiles into high-value-added smart wearable devices.