Dry aerosol coating of anti-viral particles on commercial air filters using a high-volume flow atomizer

Dae Hoon Park, Yun Haeng Joe, Jungho Hwang

Research output: Contribution to journalArticle

Abstract

Filtration is a common air cleaning technique used to remove airborne particulates. However, microorganisms can survive and multiply on the filter’s surface in heating, ventilation, and air-conditioning systems. These multiplied microorganisms eventually disperse in the air. The most conventional method of coating pristine air filter media with anti-viral material involves applying a wet coating via solution processing, wherein the filter media needs to be soaked in a solution containing a large amount of dispersed anti-viral material, and then drying the coated filter using a heated air flow. However, the latter step requires additional time and energy and often causes the deformation of the filter material. By contrast, applying an aerosolized coating is a dry process, wherein aerosolized anti-viral material is directly deposited on the filter at atmospheric pressure and room temperature. In this work, we design a laboratory-made atomizer to generate highly concentrated aerosolized particles at a high flow rate (> 200 L min–1). The generated anti-viral material (SiO2-Ag nanoparticles), which includes liquid droplets, is dried by a sheath air flow and directly applied to a commercial air filter unit. The coated anti-viral filter is evaluated for filtration efficiency and anti-viral activity against aerosolized MS2 bacteriophage.

Original languageEnglish
Pages (from-to)1636-1644
Number of pages9
JournalAerosol and Air Quality Research
Volume19
Issue number7
DOIs
Publication statusPublished - 2019 Jul

Fingerprint

Air filters
Atomizers
Aerosols
Particles (particulate matter)
coating
aerosol
filter
Coatings
air
Air
Microorganisms
Filters (for fluids)
Bacteriophages
airflow
Air conditioning
microorganism
Atmospheric pressure
Ventilation
Cleaning
Drying

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution

Cite this

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abstract = "Filtration is a common air cleaning technique used to remove airborne particulates. However, microorganisms can survive and multiply on the filter’s surface in heating, ventilation, and air-conditioning systems. These multiplied microorganisms eventually disperse in the air. The most conventional method of coating pristine air filter media with anti-viral material involves applying a wet coating via solution processing, wherein the filter media needs to be soaked in a solution containing a large amount of dispersed anti-viral material, and then drying the coated filter using a heated air flow. However, the latter step requires additional time and energy and often causes the deformation of the filter material. By contrast, applying an aerosolized coating is a dry process, wherein aerosolized anti-viral material is directly deposited on the filter at atmospheric pressure and room temperature. In this work, we design a laboratory-made atomizer to generate highly concentrated aerosolized particles at a high flow rate (> 200 L min–1). The generated anti-viral material (SiO2-Ag nanoparticles), which includes liquid droplets, is dried by a sheath air flow and directly applied to a commercial air filter unit. The coated anti-viral filter is evaluated for filtration efficiency and anti-viral activity against aerosolized MS2 bacteriophage.",
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Dry aerosol coating of anti-viral particles on commercial air filters using a high-volume flow atomizer. / Park, Dae Hoon; Joe, Yun Haeng; Hwang, Jungho.

In: Aerosol and Air Quality Research, Vol. 19, No. 7, 07.2019, p. 1636-1644.

Research output: Contribution to journalArticle

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