A new Oxford Open Materials Science article, published by Oxford University Press, presents low-cost modifications to existing N95 masks that extend their effectiveness and improve their reusability after disinfectants.
The COVID-19 crisis has increased demand for respiratory masks, with various models of DIY masks becoming popular alongside the commercially available N95. The usefulness of these masks is primarily based on the size of the aerosols they are able to filter and how long they can do so effectively.
Conventional masks like the N95 use a layered system and have a 95% effectiveness rate. Yet that rate starts to drop after someone wears them for more more than eight hours. This is because the N95 masks were designed for single use. The high demand caused by COVID-19 has led people to disinfect them for reuse. As such, a team of scientists has developed various techniques for decontamination and reuse of respiratory masks based on data and guidelines published by the Center for Disease Control.
The researchers here come up with a low-cost ($ 1) three-layer mask design that contains nylon, modified polypropylene, and non-woven cotton fabrics. While the…
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