Open AccessAl-Coated Conductive Fibrous Filter with Low Pressure Drop for Efficient Electrostatic Capture of Ultrafine Particulate Pollutants
Author(s) -
Dong Yun Choi,
Sunggoo Jung,
Dong Keun Song,
Eun Jeong An,
Duckshin Park,
TaeOh Kim,
Jae Hee Jung,
Hye Moon Lee
Publication year - 2017
Publication title -
acs applied materials and interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.535
H-Index - 228
eISSN - 1944-8252
pISSN - 1944-8244
DOI - 10.1021/acsami.7b03047
Subject(s) - materials science , electrical conductor , pressure drop , drop (telecommunication) , polyester , filtration (mathematics) , composite material , air filter , particulates , durability , filter (signal processing) , chemical engineering , mechanical engineering , telecommunications , ecology , statistics , physics , mathematics , biology , computer science , engineering , inlet , thermodynamics , computer vision
Here, we demonstrate a new strategy of air filtration based on an Al-coated conductive fibrous filter for high efficient nanoparticulate removals. The conductive fibrous filter was fabricated by a direct decomposition of Al precursor ink, AlH 3 {O(C 4 H 9 ) 2 }, onto surfaces of a polyester air filter via a cost-effective and scalable solution-dipping process. The prepared conductive filters showed a low sheet resistance (<1.0 Ω sq -1 ), robust mechanical durability and high oxidative stability. By electrostatic force between the charged fibers and particles, the ultrafine particles of 30-400 nm in size were captured with a removal efficiency of ∼99.99%. Moreover, the conductive filters exhibited excellent performances in terms of the pressure drop (∼4.9 Pa at 10 cm s -1 ), quality factor (∼2.2 Pa -1 at 10 cm s -1 ), and dust holding capacity (12.5 μg mm -2 ). After being cleaned by water, the filtration efficiency and pressure drop of the conductive filter was perfectly recovered, which indicates its good recyclability. It is expected that these promising features make the conductive fibrous filter have a great potential for use in low-cost and energy-efficient air cleaning devices as well as other relevant research areas.