Safe-by-design concepts for anticoronaviral functions are important in the production of air filters, face masks, and touch substrates because these interventions may be effective in allowing continued socioeconomic activity and alleviation of the global recession. Recent attempts to provide anticoronaviral functions have involved alternative compositions and architectures aimed at producing nanoscale compounds for highly effective anticoronaviral activities. However, translating the nanocompounds to the field requires considerable investment and time as well as actual trials; thus, they may not be a viable option for timely deployment during the COVID-19 pandemic. With these considerations in mind, we have used sodium chloride, which is generally recognized as safe (GRAS), to functionalize nonwoven sheets as frequently touched surfaces. Specifically, we produced nano-dry-salt (NDS) particles through Collison-type atomization and subsequent diffusion drying, and these NDS particles were finally deposited on electret meltblown nonwovens in a single-pass air flow. The resulting GRAS NDS deposited electret nonwovens were examined for effectiveness in anticoronaviral function and aerosol filtration with pressure drop. The treated nonwovens exhibited significant inactivation of airborne human coronaviruses (surrogates of SARS-CoV-2) while retaining the original filtration performance, even under saliva droplet and dust exposures. Several realizable platforms can thus be presented to quickly incorporate NDS deposition in conventional nonwoven production.
|Number of pages||12|
|Journal||Environmental Science: Nano|
|Publication status||Published - 2021 Oct|
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Program (NRF-2018R1A2A1A05020683) of the National Research Foundation of Korea (NRF) and Bio-Nano HealthGuard Research Program (HGUARD_2013M3A6B2078959) of the Global Frontier Project funded by the Ministry of Science, ICT and future Planning of Korea.
© The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Materials Science (miscellaneous)
- Environmental Science(all)