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The formation of ultrafine polyamide 6 nanofiber membranes with needleless electrospinning for air filtration
Author(s) -
Yan Shaole,
Yu Yuxi,
Ma Rui,
Fang Jiyu
Publication year - 2019
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4594
Subject(s) - nanofiber , materials science , polyamide , membrane , electrospinning , filtration (mathematics) , electrode , air filter , porosity , relative humidity , composite material , chemical engineering , polymer , chemistry , biochemistry , statistics , mathematics , engineering , mechanical engineering , physics , inlet , thermodynamics
Particulate matter (PM) is a major air pollutant, which has a significant impact on public health. Filtration of PM through filters is a common method to protect the environment. However, the effective removal of PM with conventional filters still remains a challenge because of its small sizes. Here, we reported the formation of ultrafine polyamide 6 (PA‐6) nanofiber membranes formed with needleless electrospinning, in which both relative humidity condition and electrode type were included in the discussion. The PA‐6S nanofibers formed by using spiral electrode as a spinneret at 60% RH had the diameter of 33 nm, while the PA‐6C nanofibers formed by using cylindrical electrode had the diameter of 120 nm. With the integration of fine diameter, small pore size, and high porosity, the resultant PA‐6S nanofiber membrane exhibits high filtration efficiency of 99.42% and low pressure drop of 85.5 Pa under a face velocity of 85 L/min. Besides, it took only 10 minutes to reduce the concentration of PM 2.5 from 999 to 34.1 μg/m 3 when used to filter real PM particles.