2/18/2023 0 Comments Coolest army of two masksIf the liquid wets the fabric, it can move viral material through it. One of the most important aspects of how to lay fabric that can block viral particles is to combine materials that have enough fibers to increase their chances of trapping, or absorbing, germs.Īnother key part of that puzzle is to use at least one layer with hydrophobic properties, which would repel aqueous substances such as respiratory droplets from someone’s airway and prevent them from passing through the mask. “But no one had really asked the question of how many layers it would take for cotton, for example, to be as good as an N95.” ![]() “Most fabrics aren’t as good as the official, certified N95 respirators.” Lustig says. The trick, Lustig says, is that the fabrics must be layered tactically. And Lustig, an associate professor of chemical engineering at Northeastern, trusts it because he and his team tested those materials in the lab.Īfter testing how nanoparticles penetrated more than 70 combinations of fabrics, the team found several combinations of common materials that can be as effective at blocking coronavirus particles as N95s-or better. His mask consists of a pair of layers of terry cloth. Photo by Matthew Modoono/Northeastern Universityīut when Steve Lustig goes out for a walk, he covers his face with a homemade mask that has the same ability to stop viral particles as an N95. Steve Lustig is an associate professor and the associate chair of research in chemical engineering at the College of Engineering at Northeastern.
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