Wearing masks scientifically is an important method to prevent the threat of particulate matters and aerosols on humans,and the performance of masks determines the protective effect. Twelve different types of commonly used masks were collected,and the structural characteristics of different masks were analyzed. By setting three different flow rates to simulated human low-speed breathing, normal breathing, and high-speed breathing states, the filtration efficiency and resistance of different types of masks to particulate matters were analyzed. The results showed that the filtration efficiency of masks on particulate matters decreased with the increase of test flow rates. Among the 12 types of masks, KN95 masks, N95 masks and KN90 masks demonstrated more stable filtration performance, which could be used in places with higher protection requirements. The protective effect of activated carbon masks and 2-layer cotton masks was poor, and they were not suitable to be used as protective masks in the medical field. The research results can provide references for the public to choose masks reasonably.
维普
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