CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems , Chinese Academy of Sciences , Beijing 100083 , China.
School of Nanoscience and Technology , University of Chinese Academy of Sciences , Beijing 100049 , China.
ACS Appl Mater Interfaces. 2018 Jul 25;10(29):24332-24338. doi: 10.1021/acsami.8b07203. Epub 2018 Jul 10.
Enhancing the filtration efficiency of air filtering material without increasing its airflow resistance is a major challenge and of great significance. In this work, we report a type of active-poled nanofiber onto which in situ active poling is applied. It results in significantly enhanced filtration efficiency as well as dust holding capacity while keeping the airflow resistance constant. Owing to the in situ applied electric field, the nanofibers as well as the particulates are polarized. As a result, at a poling voltage of 2 kV, the removal efficiency and the quality factor for PM are enhanced by 17% and 130%, respectively. More importantly, the dust holding capacity represents a 3.5-fold enhancement over normal nanofibers. The approach reported in this work has the potential of being practically utilized in air purification purposes because it can bring about not only promoted filtration performance but also lowered noise and reduced power consumption.
在不增加空气过滤材料气流阻力的情况下提高其过滤效率是一项重大挑战，具有重要意义。在这项工作中，我们报告了一种主动极化纳米纤维，对其进行了原位主动极化。它在保持气流阻力不变的情况下，显著提高了过滤效率和容尘量。由于施加了原位电场，纳米纤维和颗粒都被极化了。结果，在极化电压为 2 kV 时，PM 的去除效率和质量因子分别提高了 17%和 130%。更重要的是，与普通纳米纤维相比，容尘量提高了 3.5 倍。本工作中报道的方法具有在空气净化方面实际应用的潜力，因为它不仅可以提高过滤性能，而且可以降低噪音和减少功耗。
