During the COVID-19 pandemic, all of us wore masks. Generally, what material are they made of? What is the role of these masks?
Masks are generally made of cotton cloth or non-woven fabric with multiple layers. Some masks also contain a middle layer of melt-blown polymer that acts as an additional filter.
The role of masks is to act as a barrier that filters out droplets, particles, and germs from the air we breathe. Masks trap respiratory droplets from the wearer and also filter out harmful particles from the surrounding air, similar to the filtration process. The multiple layers and fine pores in the mask material prevent the passage of virus-containing droplets, thus reducing the spread of infections like COVID-19.
Explanation
The chapter explains that filtration can be used to separate insoluble solid components from a liquid. Different materials like cotton, charcoal, and filter paper can be used as filters depending on the size of particles to be removed. Masks work on the same principle of filtration, where the fabric acts as a filter with small pores that trap particles while allowing air to pass through.
Solution Steps
Masks are made of cotton cloth or non-woven fabric with multiple layers, sometimes including a melt-blown polymer filter.
They act as a barrier to filter out droplets, particles, and germs from the air.
Masks trap respiratory droplets from the wearer and filter harmful particles from the surrounding air.
Multiple layers and fine pores prevent the passage of virus-containing droplets to reduce the spread of infection.