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 journalArticlepeer-review

12 Citations (Scopus)


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
Issue number7
Publication statusPublished - 2019 Jul

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (NRF-2018R1A2A1A05020683).

Publisher Copyright:
© Taiwan Association for Aerosol Research.

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution


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