Effects of Surrounding Temperature on Antimicrobial Air Filters Coated with Sophora flavescens Nanoparticles
- Effects of Surrounding Temperature on Antimicrobial Air Filters Coated with Sophora flavescens Nanoparticles
- 심경미; 이희주; 노주원; 배귀남; 정재희
- antimicrobial; filter; natural product; temperature; sophora flavescens
- Issue Date
- Aerosol science and technology
- VOL 48, NO 3, 323-331
- Bioaerosols, such as bacterial and fungal cells and their spores,
are components of indoor airborne particulate matter and have
been associated with human health problems as well as various environmental
issues. Natural antimicrobial products have been used
in air filters for bioaerosol control. However, natural products may
lose some function due to their sensitivity to environmental factors
such as temperature and humidity. In this study, we investigated
the effects of temperature on antimicrobial fiber filters coated with
nanoparticles of a natural product, namely, Sophora flavescens
extract. Inactivation efficiency decreased with increasing temperature
and treatment time. A quantitative chemical analysis of the
filters revealed that the quantities of antimicrobial compounds decreased
noticeably, with a consequent decrease in antimicrobial activity.
In addition, the S. flavescens nanoparticles on the filter fiber
surface melted gradually as treatment time increased at temperatures
>100.C. This change in nanoparticle morphology in turn
affected the pressure and filtration efficiency of filters, both of
which decreased with increasing temperature and treatment time.
These results could provide a scientific basis for the improvement
of indoor air-quality control using antimicrobial air filters coated
with S. flavescens nanoparticles.
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