Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 29, Pages 24332-24338Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b07203
Keywords
air filtering material; in situ active poling; active-poled nanofibers; filtration efficiency; dust holding capacity
Funding
- National Key R&D Project from Ministry of Science and Technology, China [2016YFA0202701, 2016YFA0202703]
- National Science Foundation of China [51572030]
- Beijing Natural Science Foundation [2162047]
- China Thousand Talents Program
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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 PM2.5 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.
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