Abstract

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.
Original languageEnglish
Article number6553
JournalSustainability
Volume13
Issue number12
Number of pages18
ISSN2071-1050
DOIs
Publication statusPublished - 8 Jun 2021

Keywords

  • Polyvinyl alcohol (PVA)
  • Electrospinning
  • Nanofibres
  • Air filters
  • Titanium dioxide (TiO)
  • Activated charcoal

Fingerprint

Dive into the research topics of 'Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants'. Together they form a unique fingerprint.

Cite this