Rozdziały

Stały URI dla kolekcjihttp://hdl.handle.net/11652/4411

Przeglądaj

Filtry

20222

Ustawienia

Ma przypisane plikisearch.filters.applied.operator.equals: TakTematsearch.filters.applied.operator.equals: search.filters.subject.bacterial filtration efficiency

collection.search.results.head

Teraz wyświetlane 1 - 2 z 2
  • Pozycja
    Design and development of a nanofiber reinforced multilayered cloth face mask
    (Wydawnictwo Politechniki Łódzkiej, 2022) Palak, Handan; Kayaoglu, Burcak Karagüzel
    The use of medical masks in daily life has become inevitable due to the Covid-19 pandemic. Especially at the beginning of the pandemic, the supply of face masks was unable to meet the demand. Also, medical masks are causing plastic waste since they are not sustainable. Accordingly, cloth masks have the potential to be an environmentally friendly and sustainable alternative to medical masks. In this study, it was aimed to develop two and three layered cloth masks, and investigate the effects of fabric parameters of the masks on the bacterial filtration efficiency (BFE). Four fabrics with different cover factors were woven. The raising finishing was applied to the outer layer to increase the filtration by closing the pores on the surface. An electrospun nanofiber layer was also used as a mid-layer to improve bacterial filtration. All BFE results were higher than the minimum standard BFE of 90%. The results showed that an electrospun mid-layer was more effective for increasing the BFE compared to raising finishing onto the outer layer of the masks. The BFE improved slightly when the cover factor of the fabric increased.
  • Pozycja
    A study on barrier performance of medical face masks
    (Wydawnictwo Politechniki Łódzkiej, 2022) Munir, Muhammad Usman; Mikučionienė, Daiva
    The sudden outbreak and rapid transmission of SARS-Covid-19 virus has urged people around the world to adopt safety measures to help stop the spread of this infectious disease. Thus, there comes a sudden increase in demand for PPEs such as face masks and gowns. This increase in demand has paved the way for low-quality medical face masks to the public, causing a serious threat to the contamination of the Covid-19 virus. Therefore, to verify the real picture of the performance quality of medical face masks, we carried out a study to check their barrier performance as per the requirements of International Standards EN 14683 and ASTM F2100. We conducted the bacterial filtration efficiency, particle filtration efficiency and differential pressure tests on all the medical face masks samples and found that almost all the masks fall under 95% filtration to bacterial aerosol requirement, 95% filtration efficiency to latex sphere, and had differential pressure in limits. Our study has also concluded a correlation between these performance criteria, and it would be a great help and time saving if we adopted the findings of this research. The out has helped to create public confidence in their quality performance.