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Homemade mask from two layers of fabric of different type, for example, cotton and silk, a delay of from 80 to 99% of particles of aerosols and almost equal in the effectiveness of the respirator class N95 approved for the medical staff of the United States. To this conclusion, as reported in the journal ACS Nano, came physicists from Argonne national laboratory in the United States.
The researchers created a special spray installation, which explored how holding one or the other mask harmful particles. The system is sprayed in the air, the liquid and particles of solid matter, after which it was checked at the masks of different materials.
The results of the experiments the worst performance of the protection was from single-layer masks. Although they did fine with the particles of some types of aerosols, but freely conceded most small particles.
The researchers emphasized that it is important a tight seal of mask to face and no damage. Otherwise, the effectiveness of wear reduced at least twice.
Outbreaks of coronavirus occurred in almost all countries of the world. In early March, the world health organization declared the pandemic COVID-19. According to the latest data of the who, has infected more than 2.6 million people, almost 182 thousand died.
Relevant data on the situation of COVID-19 in Russia and the world presented on the portal stopmanager.of the Russian Federation.
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