Efficient removal of particulate matter (PM) is the major goal for various air cleaning technologies due to its huge impact on human health. Here, a washable high‐efficiency triboelectric air filter (TAF) that can be used multiple times is presented. The TAF consists of five layers of the polytetrafluoroethylene (PTFE) and nylon fabrics. Compared with traditional electrostatic precipitator, which requires a high‐voltage power supply, the TAF can be charged by simply rubbing the PTFE and nylon fabrics against each other. The electrical properties of the TAF are evaluated through the periodic contacting–separating of the PTFE and nylon fabrics using a linear motor, and an open‐circuit voltage of 190 V is achieved. After charging, the TAF has a removal efficiency of 84.7% for PM_0.5, 96.0% for PM_2.5, which are 3.22 and 1.39 times as large as the uncharged one. Most importantly, after washing several times, the removal efficiency of the TAF maintains almost the same, while the commercial face mask drops to 70% of its original efficiency. Furthermore, the removal efficiency of the PM_2.5 is very stable under high relative humidity. Therefore, the TAF is promising for fabricating a reusable and high‐efficiency face mask.

中文翻译：

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可清洗的多层摩擦式电动空气滤清器，用于高效去除颗粒物PM2.5

由于其对人体健康的巨大影响，有效去除颗粒物（PM）是各种空气净化技术的主要目标。在此，提出了一种可多次使用的可清洗高效摩擦式电动空气滤清器（TAF）。TAF由五层聚四氟乙烯（PTFE）和尼龙织物组成。与需要高压电源的传统静电除尘器相比，只需将PTFE和尼龙织物相互摩擦即可为TAF充电。通过使用线性电动机定期接触－分离PTFE和尼龙织物来评估TAF的电性能，并获得190 V的开路电压。充电后，TAF对PM _0.5的去除效率为84.7％，对PM _2.5的去除效率为96.0％，它们是未充电的三倍，分别是其的3.22和1.39倍。最重要的是，清洗几次后，TAF的去除效率几乎保持不变，而商用口罩则下降到其原始效率的70％。此外，PM _2.5的去除效率在高相对湿度下非常稳定。因此，TAF有望用于制造可重复使用的高效面罩。