A COVID-19 NO BRASIL: ciência, inovação tecnológica e políticas públicas - Volume 1

Domínguez, Ángeles; Santos, Aline Rocha; Valladares, A Camblor; Dias, Beatriz; Areda, Camila Alves; Gillo, C.; Souza, Carlos Dornels Freire de; Avila, Cassandra; Amorim, Cláudia Naves David; Galato, Dayani; Carvalho, de; Lago, Diane M. S. K; Hamann, Emmanuelle; Martins, Eliane; Silva, Emilia V; Reis, Fátima De Carvalho Madeira; Chaves, Gisele de Lorena Diniz; Silva, G. V; Joanitti, G. A; Ramos, H. M. P; Martins, Henrique; Costa, Joseph; Barrios, J.A.S; Oliveira, Karla Caroline; Soares, L. S; Paulino, Luís Antônio; Machado, Maíra Rocha; Carneiro, Murilo; Alves, Marcelo; Pires, Marcos Cordeiro; Montagner, M. I; Umana-Rivas, Mariel; Rivas, Mariel Umana; Montagner, Marcia; Saavedra, Patricio; Medeiros-Souza, P; Silva, Paulo Eugênio.; Andrade, P. A; Oliveira, Raphael Santos de; Mateus, S. R. M; Guimarães, Silvana Mangeon Mereilles; Rosa, S. S. R. F.; Cruvinel, V. R. N; Arraes, V. C; Lima, Viviane Vanessa Rodrigues da Silva Santana; Pinheiro, Weiss

doi:10.24824/978655578433.6

2020

DOI: 10.24824/978655578433.6

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A COVID-19 NO BRASIL: ciência, inovação tecnológica e políticas públicas - Volume 1

Ángeles Domínguez¹,

Aline Rocha Santos²,

A Camblor Valladares³

et al.

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A novel N95 respirator with chitosan nanoparticles: mechanical, antiviral, microbiological and cytotoxicity evaluations

Landim,

Carneiro,

Joanitti

et al. 2023

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Background It is known that some sectors of hospitals have high bacteria and virus loads that can remain as aerosols in the air and represent a significant health threat for patients and mainly professionals that work in the place daily. Therefore, the need for a respirator able to improve the filtration barrier of N95 masks and even inactivating airborne virus and bacteria becomes apparent. Such a fact motivated the creation of a new N95 respirator which employs chitosan nanoparticles on its intermediate layer (SN95 + CNP). Results The average chitosan nanoparticle size obtained was 165.20 ± 35.00 nm, with a polydispersity index of 0.36 ± 0.03 and a zeta potential of 47.50 ± 1.70 mV. Mechanical tests demonstrate that the SN95 + CNP respirator is more resistant and meets the safety requisites of aerosol penetration, resistance to breath and flammability, presenting higher potential to filtrate microbial and viral particles when compared to conventional SN95 respirators. Furthermore, biological in vitro tests on bacteria, fungi and mammalian cell lines (HaCat, Vero E6 and CCL-81) corroborate the hypothesis that our SN95 + CNP respirator presents strong antimicrobial activity and is safe for human use. There was a reduction of 96.83% of the alphacoronavirus virus and 99% of H1N1 virus and MHV-3 betacoronavirus after 120 min of contact compared to the conventional respirator (SN95), demonstrating that SN95 + CNP have a relevant potential as personal protection equipment. Conclusions Due to chitosan nanotechnology, our novel N95 respirator presents improved mechanical, antimicrobial and antiviral characteristics.

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A novel N95 respirator with chitosan nanoparticles: mechanical, antiviral, microbiological and cytotoxicity evaluations

Landim,

Carneiro,

Joanitti

et al. 2023

Discover Nano

View full text Add to dashboard Cite

show abstract

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A COVID-19 NO BRASIL: ciência, inovação tecnológica e políticas públicas - Volume 1

Cited by 1 publication

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A novel N95 respirator with chitosan nanoparticles: mechanical, antiviral, microbiological and cytotoxicity evaluations

A novel N95 respirator with chitosan nanoparticles: mechanical, antiviral, microbiological and cytotoxicity evaluations

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