Specificity of UV-C LED disinfection efficacy for three N95 respirators

Abstract The recent surge in the use of UV technology for personal protective equipment (PPE) has created a unique learning opportunity for the UV industry to deepen surface disinfection knowledge, especially on surfaces with complex geometries, such as the N95 filter facepiece respirators (FFR). Th...

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Autores principales:	C. Carolina Ontiveros, David C. Shoults, Sean MacIsaac, Kyle D. Rauch, Crystal L. Sweeney, Amina K. Stoddart, Graham A. Gagnon
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/926d08a5b7be4c4980d5ab1c66e8aece
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spelling	oai:doaj.org-article:926d08a5b7be4c4980d5ab1c66e8aece2021-12-02T18:46:54ZSpecificity of UV-C LED disinfection efficacy for three N95 respirators10.1038/s41598-021-94810-42045-2322https://doaj.org/article/926d08a5b7be4c4980d5ab1c66e8aece2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94810-4https://doaj.org/toc/2045-2322Abstract The recent surge in the use of UV technology for personal protective equipment (PPE) has created a unique learning opportunity for the UV industry to deepen surface disinfection knowledge, especially on surfaces with complex geometries, such as the N95 filter facepiece respirators (FFR). The work outlined in this study addresses the interconnectedness of independent variables (e.g., UV Fluence, respirator material) that require consideration when assessing UV light efficacy for disinfecting respirators. Through electron microscopy and Fourier-transform infrared (FTIR) spectroscopy, we characterized respirator filter layers and revealed that polymer type affects disinfection efficacy. Specifically, FFR layers made from polypropylene (PP) (hydrophobic in nature) resulted in higher disinfection efficiency than layers composed of polyethylene terephthalate (PET-P) (hygroscopic in nature). An analysis of elastic band materials on the respirators indicated that silicone rubber-based bands achieved higher disinfection efficiency than PET-P bands and have a woven, fabric-like texture. While there is a strong desire to repurpose respirators, through this work we demonstrated that the design of an appropriate UV system is essential and that only respirators meeting specific design criteria may be reasonable for repurposing via UV disinfection.C. Carolina OntiverosDavid C. ShoultsSean MacIsaacKyle D. RauchCrystal L. SweeneyAmina K. StoddartGraham A. GagnonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q C. Carolina Ontiveros David C. Shoults Sean MacIsaac Kyle D. Rauch Crystal L. Sweeney Amina K. Stoddart Graham A. Gagnon Specificity of UV-C LED disinfection efficacy for three N95 respirators
description	Abstract The recent surge in the use of UV technology for personal protective equipment (PPE) has created a unique learning opportunity for the UV industry to deepen surface disinfection knowledge, especially on surfaces with complex geometries, such as the N95 filter facepiece respirators (FFR). The work outlined in this study addresses the interconnectedness of independent variables (e.g., UV Fluence, respirator material) that require consideration when assessing UV light efficacy for disinfecting respirators. Through electron microscopy and Fourier-transform infrared (FTIR) spectroscopy, we characterized respirator filter layers and revealed that polymer type affects disinfection efficacy. Specifically, FFR layers made from polypropylene (PP) (hydrophobic in nature) resulted in higher disinfection efficiency than layers composed of polyethylene terephthalate (PET-P) (hygroscopic in nature). An analysis of elastic band materials on the respirators indicated that silicone rubber-based bands achieved higher disinfection efficiency than PET-P bands and have a woven, fabric-like texture. While there is a strong desire to repurpose respirators, through this work we demonstrated that the design of an appropriate UV system is essential and that only respirators meeting specific design criteria may be reasonable for repurposing via UV disinfection.
format	article
author	C. Carolina Ontiveros David C. Shoults Sean MacIsaac Kyle D. Rauch Crystal L. Sweeney Amina K. Stoddart Graham A. Gagnon
author_facet	C. Carolina Ontiveros David C. Shoults Sean MacIsaac Kyle D. Rauch Crystal L. Sweeney Amina K. Stoddart Graham A. Gagnon
author_sort	C. Carolina Ontiveros
title	Specificity of UV-C LED disinfection efficacy for three N95 respirators
title_short	Specificity of UV-C LED disinfection efficacy for three N95 respirators
title_full	Specificity of UV-C LED disinfection efficacy for three N95 respirators
title_fullStr	Specificity of UV-C LED disinfection efficacy for three N95 respirators
title_full_unstemmed	Specificity of UV-C LED disinfection efficacy for three N95 respirators
title_sort	specificity of uv-c led disinfection efficacy for three n95 respirators
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/926d08a5b7be4c4980d5ab1c66e8aece
work_keys_str_mv	AT ccarolinaontiveros specificityofuvcleddisinfectionefficacyforthreen95respirators AT davidcshoults specificityofuvcleddisinfectionefficacyforthreen95respirators AT seanmacisaac specificityofuvcleddisinfectionefficacyforthreen95respirators AT kyledrauch specificityofuvcleddisinfectionefficacyforthreen95respirators AT crystallsweeney specificityofuvcleddisinfectionefficacyforthreen95respirators AT aminakstoddart specificityofuvcleddisinfectionefficacyforthreen95respirators AT grahamagagnon specificityofuvcleddisinfectionefficacyforthreen95respirators
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Specificity of UV-C LED disinfection efficacy for three N95 respirators

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