Eficiência de filtragem de partículas em materiais têxteis utilizados em máscaras faciais caseiras
This scientific study aims to evaluate the filtering efficiency of particles in different textile materials used for the production of homemade face masks, and compare them with face protection masks already on the market. The efficiency of twelve types of masks for nonprofessional use, produced f...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/52713 |
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| Resumo: | This scientific study aims to evaluate the filtering efficiency of particles in different textile
materials used for the production of homemade face masks, and compare them with face
protection masks already on the market. The efficiency of twelve types of masks for nonprofessional use, produced from TNT (Non Woven Fabric) with different weights, 100%
cotton fabric and mesh, was evaluated and compared with commercial
3M/KN95/PFF2/surgical masks. The masks were made with double and triple layers of
fabric, in order to analyze the effect and suitability of hybrid multilayer approaches for
homemade masks, in order to establish a more efficient combination between the materials
studied. The samples produced were characterized via weight analysis and the correlation
between the permeability of textiles and their retention power of aerosol particles were
evaluated through the absorption of various sizes of monodisperse aerosol spheres by the
Salt Particle Filtration Efficiency test. (EFS). These results were compared with the
reference results of commercial masks with particulate filters, which meet the N95
standard. For each tissue analyzed, the types of substrate, weight and number of layers
were factors that significantly influenced the filtration efficiency (EF) of aerosol particles
and may be related to protection against particles that transmit the SARS-CoV-2 virus.
Homemade face protection masks produced with tricoline fabric and 100% cotton mesh
showed EF below 60% for particle size of 100 nm. On the other hand, TNT masks with
different layers (one, two and three layers) presented EF greater than 80% compared to
hospital surgical masks, N95 and PFF2 S (hospital mask PFF2 without filter). Therefore,
homemade masks provide less protection for the population, but their use can prevent
against the high transmissibility of the SARS-CoV-2 virus, which causes the COVID-19
disease, as well as other viruses. |
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