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

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

工程（英文） ›› 2024, Vol. 39 ›› Issue (8) : 235-243.

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工程（英文） ›› 2024, Vol. 39 ›› Issue (8) : 235-243. DOI: 10.1016/j.eng.2024.01.015
研究论文
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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

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

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摘要

随着全球经济的快速发展和人口的增长，大量的废旧纺织品也随之产生。这导致了有限资源的浪费和由于处置不当而造成的环境污染问题。对废弃纺织品进行合理回收，并将其转化为高附加值的新兴产品，如智能可穿戴器件，这是令人着迷的。在这里，我们提出了一种新的路线，通过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，其具有解耦的自供电温度-压缩应变双参数传感的特性。热电气凝胶的压缩响应时间为0.2 s，塞贝克系数为43 μV·K−1，导热系数小于0.04 W·m−1·K−1。三甲氧基(甲基)硅烷(MTMS)和纤维素的交联使气凝胶具有优异的弹性，使其可以用作猜谜游戏和面部表情识别的压缩应变传感器。此外，基于热电效应，气凝胶可以在自供电模式下以输出的热电压作为刺激信号进行温度检测和区分。另外，将气凝胶制备的阵列器件与无线传输模块连接而制成的可穿戴系统，可以在手机应用程序中发出温度警报，而不会由于抓握过程中产生的压缩应变而产生信号干扰。因此，我们的策略对于减少全球环境污染具有重要意义，并为将废旧纺织品转化为高附加值的智能可穿戴设备提供了一条启发性的途径。

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.

关键词

废旧纺织品 / 高附加值回收 / 热电 / 弹性 / 解耦传感

Keywords

Waste textiles / High value-added recycling / Thermoelectrics / Elasticity / Decoupled sensing

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何昕阳, 刘明远, 蔡佳欣. 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. Engineering. 2024, 39(8): 235-243 https://doi.org/10.1016/j.eng.2024.01.015

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