The Incredible And Clever Method that Makes N95 Masks Good at Filtering Particles

N95 Masks

N95 masks have many smart methods for filtering airborne particles. The most impressive method is the electrostatic charging of N95 masks, which is a significant contributor to their filtration performance, increasing it at least 10-fold over the uncharged fabric.

An electret (formed of electr- from “electricity” and -et from “magnet”) is a dielectric material that has a quasi-permanent electric charge or dipole polarisation. An electret generates internal and external electric fields and is the electrostatic equivalent of a permanent magnet.

The name originates from “electron” and “magnet”; drawing an analogy to the development of a magnet by the alignment of magnetic fields in a piece of iron. [source]

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