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Article

Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants

1
Department of the Built Environment, Aalborg University, DK-2450 Copenhagen, Denmark
2
Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen, Denmark
3
Department of Materials and Production, Aalborg University, DK-9220 Aalborg, Denmark
*
Author to whom correspondence should be addressed.
Academic Editor: Luca Stabile
Sustainability 2021, 13(12), 6553; https://doi.org/10.3390/su13126553
Received: 23 March 2021 / Revised: 1 June 2021 / Accepted: 4 June 2021 / Published: 8 June 2021
(This article belongs to the Special Issue Sustainable Building and Sustainable Indoor Environment)
Nanofibre filters may offer new properties not available in commercial fibre filters. These include a higher surface area and the ability to include novel materials within the fibres. In addition the small size allows potential gains in performance due to the slip-flow phenomenon in which normal gas viscosity does not apply to objects smaller than the mean free path of the gas. We tested the properties of novel electrospun fibre filters generated from polyvinyl alcohol solutions, optionally embedded with nano-grains of photocatalytic TiO2 and activated charcoal. The tested materials exhibited pressure drops in the range of 195 Pa to 2693 Pa for a face velocity of 5.3 cm/s and a removal efficiency greater than 97% for 12–480 nm particles. Basis weights for the filters ranged from 16.6 to 67.6 g/m2 and specific surface areas ranged from 1.4 to 17.4 m2/g. Reactivity towards volatile organic compounds (VOCs) was achieved by irradiating the photocatalytic filters with ultraviolet light. It is necessary to solve the problems connected to the absorbance of VOCs and further reduce the resistance to airflow in order for these filters to achieve widespread use. The incorporation of reactive air filtration into building ventilation systems will contribute to improved indoor air quality. View Full-Text
Keywords: poly(vinyl alcohol); electrospinning; nanofibres; air filters; titanium dioxide; activated charcoal poly(vinyl alcohol); electrospinning; nanofibres; air filters; titanium dioxide; activated charcoal
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MDPI and ACS Style

Orlando, R.; Polat, M.; Afshari, A.; Johnson, M.S.; Fojan, P. Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants. Sustainability 2021, 13, 6553. https://doi.org/10.3390/su13126553

AMA Style

Orlando R, Polat M, Afshari A, Johnson MS, Fojan P. Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants. Sustainability. 2021; 13(12):6553. https://doi.org/10.3390/su13126553

Chicago/Turabian Style

Orlando, Roberta, Merve Polat, Alireza Afshari, Matthew S. Johnson, and Peter Fojan. 2021. "Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants" Sustainability 13, no. 12: 6553. https://doi.org/10.3390/su13126553

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