Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 9, Issue 40, Pages 13545-13558Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c04530
Keywords
face mask materials; COVID-19; SARS-CoV-2; scanning electron microscopy; contact angle; X-ray diffraction; X-ray photoelectron spectroscopy; Raman spectroscopy
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Funding
- DOE Office of Science through the National Virtual Biotechnology Laboratory
- Coronavirus Aid, Relief, and Economic Security (CARES) Act
- DOE Office of Science by Brookhaven National Laboratory [DE-SC0012704]
- U.S. DOE Office of Science Facility, at Brookhaven National Laboratory [DE-SC0012704]
- NIH Institutional Research and Academic Career Development Award
- New York Consortium for the Advancement of Postdoctoral Scholars (IRACDA-NYCAPS) [K12-GM102778]
- William and Jane Knapp Chair in Energy and the Environment
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The COVID-19 pandemic has led to shortages of personal protective equipment such as face masks. New sterilization procedures like dry heat and steam are being developed to address the shortage, potentially easing the increasing need for protective masks globally. Studies are using advanced techniques like synchrotron-based spectroscopy to investigate the impact of heat treatment on commercially available respirators and surgical masks.
The COVID-19 pandemic resulted in imminent shortages of personal protective equipment such as face masks. To address the shortage, new sterilization or decontamination procedures for masks are quickly being developed and employed. Dry heat and steam sterilization processes are easily scalable and allow treatment of large sample sizes, thus potentially presenting fast and efficient decontamination routes, which could significantly ease the rapidly increasing need for protective masks globally during a pandemic like COVID-19. In this study, a suite of structural and chemical characterization techniques, including scanning electron microscopy (SEM), contact angle, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman were utilized to probe the heat treatment impact on commercially available 3M 8210 N95 Particulate Respirator and VWR Advanced Protection surgical mask. Unique to this study is the use of the synchrotron-based In situ and Operando Soft X-ray Spectroscopy (IOS) beamline (23-ID-2) housed at the National Synchrotron Light Source II at Brookhaven National Laboratory for near-edge X-ray absorption spectroscopy (NEXAFS).
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