In Situ Active Poling of Nanofiber Networks for Gigantically Enhanced Particulate Filtration

Chun Xiao Li; Shuang Yang Kuang; Yang Hui Chen; Zhong Lin Wang; Congju Li; Guang Zhu

doi:10.1021/acsami.8b07203

In Situ Active Poling of Nanofiber Networks for Gigantically Enhanced Particulate Filtration

ACS Appl Mater Interfaces. 2018 Jul 25;10(29):24332-24338. doi: 10.1021/acsami.8b07203. Epub 2018 Jul 10.

Authors

Chun Xiao Li^{1

2}, Shuang Yang Kuang^{1

2}, Yang Hui Chen^{1

2}, Zhong Lin Wang^{1

2

3

4}, Congju Li^{1

2}, Guang Zhu^{1

2

5

6}

Affiliations

¹ 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.
² School of Nanoscience and Technology , University of Chinese Academy of Sciences , Beijing 100049 , China.
³ Center on Nanoenergy Research, School of Physical Science and Technology , Guangxi University , Nanning 530004 , China.
⁴ School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States.
⁵ Department of Mechanical, Materials and Manufacturing Engineering , The University of Nottingham Ningbo China , Ningbo 315100 , China.
⁶ New Materials Institute , The University of Nottingham Ningbo China , Ningbo 315100 , China.

PMID: 29979875
DOI: 10.1021/acsami.8b07203

Abstract

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_2.5 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.

Keywords: active-poled nanofibers; air filtering material; dust holding capacity; filtration efficiency; in situ active poling.