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 μV·K and an ultralow thermal conductivity of less than 0.04 W·m·K. 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.

中文翻译：

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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基热电气凝胶

全球经济的快速发展和人口的增长，伴随着大量废旧纺织品的产生。这导致了有限资源的浪费以及因处置不当造成严重的环境污染问题。废旧纺织品的合理回收并转化为智能可穿戴设备等高附加值新兴产品，令人着迷。在这里，我们提出了一种新颖的路线图，通过具有解耦自供电温度-压缩应变双参数传感特性的一步冻干工艺，将废弃棉织物转化为三维弹性纤维基热电气凝胶。该热电气凝胶具有0.2 s的快速压缩响应时间、43 μV·K的较高塞贝克系数和小于0.04 W·m·K的超低导热系数。三甲氧基（甲基）硅烷（MTMS）和纤维素的交联赋予气凝胶优异的弹性，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，气凝胶可以以输出热电压作为刺激信号，在自供电模式下进行温度检测和区分。此外，通过将气凝胶制备的阵列装置与无线传输模块连接而制备的可穿戴系统允许在手机应用中发出温度警报，而不会因握持过程中产生的压缩应变而造成信号干扰。因此，我们的战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启示性途径。