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Polyethylene/Polypropylene Bicomponent Spunbond Air Filtration Materials Containing Magnesium Stearate for Efficient Fine Particle Capture
journal contribution
posted on 2019-10-18, 19:13 authored by Jinxin Liu, Haifeng Zhang, Hugh Gong, Xing Zhang, Yuxiao Wang, Xiangyu JinParticulate
matter (PM) poses a threat to people’s living environment.
Fresh air ventilation systems can filter particulate matter and play
an important role in enhancing indoor air quality. A high filtration
efficiency material with low pressure drop prolongs the service life
of the filters and reduces energy consumption. However, maintaining
the long-term storage of charge in electret materials remains a challenge.
Herein, we report a novel sheath/core bicomponent spunbond (BCS) electret
material with low pressure drop and improved charge stability using
polyethylene/polypropylene (PE/PP) as the matrix polymer and magnesium
stearate (MgSt) as the charge enhancer. Benefiting from the three-dimensional
(3D) fluffy structure created by the spunbond technique and through-air
reinforcement, the resulting electret materials exhibit a low pressure
drop of 37.92 Pa, excellent dust holding capacity of 10.87 g m–2, and high filtration efficiency of 98.94%. Moreover,
due to the introduction of MgSt, the filtration efficiency only decreased
by 4.1% in 90 days. The successful fabrication of PE/PP BCS materials
with MgSt not only provided a promising medium for particle capture
but also developed a new approach for the design of fresh air filtration
materials.