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N95 masks could soon be rechargeable instead of disposable - TechCrunch
Sep 14, 2020 48 secs

The combination of these two methods makes N95 masks very effective, but the electrostatic charge, like any charge, dissipates after time as air and moisture pass over it.

“We find that the total charge deposited on the masks depends strongly on the charging time… with the pristine value almost reattained after a 60 min charge at 1000 V,” write the researchers in their paper.

We tested a technique by which the filter material maintains its charge and thus its filtration efficiency… Since the currents required are extremely small, a large battery is not required, and it is possible that a small compact and practical solution may be feasible.

Though it won’t be in hospitals tomorrow or next week, the team notes that “crucially, our method can be performed using readily available equipment and materials and so can be employed both in urban and rural settings.” So once it’s thoroughly tested it’s possible these rechargeable masks could start showing up everywhere

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