基于水力充电技术的智能纺织品可洗透气驻极体传感器,ACS Applied Materials & Interfaces

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基于水力充电技术的智能纺织品可洗透气驻极体传感器
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-12-30 , DOI: 10.1021/acsami.2c19224
Jianfeng Zhang ₁ , Gangjin Chen _{1,

2} , Kaijun Zhang ₃ , Dazhe Zhao ₃ , Zhaoyang Li ₃ , Junwen Zhong ₃

Affiliation

基于驻极体材料的柔性机电传感器在可穿戴电子产品中显示出巨大的应用潜力。然而，实现良好的透气性同时保持良好的耐洗性仍然是传统驻极体传感器面临的挑战。在此，我们报告了一种基于水力充电技术的可洗透气驻极体传感器，即水力充电驻极体传感器（HCES）。熔喷聚丙烯（MBPP）驻极体织物可以在水洗时带电。通过优化水的种类、水压、水温、干燥温度、干燥时间、环境气压和环境相对湿度，可以提高MBPP驻极体织物的表面电位。提出单根纤维因与水接触带电而在上下表面具有不同极性的电荷，从而在纤维之间形成电偶极子，比传统的电晕充电方法具有更好的表面电位稳定性。HCES可实现~215 mm/s的高透气性和高达~0.21 V/Pa的灵敏度，输出电压在超过36,000次工作循环和多次水洗后保持稳定。作为演示示例，HCES 集成到胸带中以监测人体呼吸状况。

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Washable and Breathable Electret Sensors Based on a Hydro-Charging Technique for Smart Textiles

Flexible electromechanical sensors based on electret materials have shown great application potential in wearable electronics. However, achieving great breathability yet maintaining good washability is still a challenge for traditional electret sensors. Herein, we report a washable and breathable electret sensor based on a hydro-charging technique, namely, hydro-charged electret sensor (HCES). The melt-blown polypropylene (MBPP) electret fabric can be charged while washing with water. The surface potential of MBPP electret fabric can be improved by optimizing the type of water, water pressure, water temperature, drying temperature, drying time, ambient air pressure, and ambient relative humidity. It is proposed that the single fiber has charges of different polarities on the upper and lower surfaces due to contact electrification with water, thereby forming electric dipoles between fibers, which can lead to better surface potential stability than the traditional corona-charging method. The HCES can achieve a high air permeability of ∼215 mm/s and sensitivity up to ∼0.21 V/Pa, with output voltage remaining stable after over 36,000 working cycles and multiple times of water washing. As a demonstration example, the HCES is integrated into a chest strap to monitor human respiration conditions.

更新日期：2022-12-30

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