April 24, 2020
After the COVID-19 pandemic, the US Centers for Disease Control and Prevention recommended that people wear masks in public places. Since N95 and surgical masks are scarce and should be reserved for medical staff to use, many people are covering their own duvets. Now, the researchers are
The combination of cotton and natural silk or chiffon can effectively filter out aerosol particles (if appropriate).
SARS-CoV-2 is a new type of coronavirus that causes COVID-19. It is believed to be spread mainly through the following channels
When an infected person coughs, sneezes, speaks or breathes. These droplets form a wide range, but the smallest droplets are called aerosols. They can easily slip out of the openings between the fibers of certain fabrics, causing some people to question whether the fabrics
It can actually help prevent disease. Therefore, Supratik Guha of the University of Chicago and colleagues hope to study the ability of ordinary fabrics used alone or in combination to filter out aerosols that are similar in size to respiratory droplets.
The researchers used an aerosol mixing chamber to produce particles ranging in diameter from 10 nm to 6 μm. The fan blows the aerosol through various cloth samples at an airflow rate corresponding to the static breathing of a person. The research team measured the number and size of particles in the air before and after passing through the fabric. A layer of tightly woven cotton and two layers of polyester spandex chiffon (a transparent fabric commonly used in evening dresses) are combined to filter out the most water.
(80-99%, depending on
), its performance is close to N95 mask material. Replace chiffon with
Or flannel, or simply using quilts and cotton-polyester cotton quilts, can produce similar results. The researchers pointed out that tightly woven fabrics (such as cotton) can act as a mechanical barrier to particles, while fabrics with electrostatic charges (such as certain types of chiffon and natural silk) can act as an electrostatic barrier. However, a gap of 1% will reduce the filtration efficiency of all masks by half or more, thus emphasizing the importance of correct mask installation.
Feedback to the editor
15 hours ago
16 hours ago
March 19, 2021
9 hours ago
10 hours ago
1 hour ago
3 hours ago
5 hours ago
7 hours ago
8 hours ago
March 21, 2021
April 7, 2020
April 16, 2020
April 6, 2020
April 22, 2020
April 17, 2020
Your feedback will be sent directly to the Science X editor.
Thank you for taking the time to send your valuable comments to Science X editors.
You can rest assured that our editors will closely monitor every feedback sent and will take appropriate action. Your opinion is very important to us.
Due to excessive communication volume, we do not guarantee a personal answer.
Your email address has already been used
Let the recipient know who sent the email. Neither your address nor the recipient's address will be used for any other purpose. The information you enter will appear in your email, but Phys.org will not keep them in any form.
Get weekly and/or daily updates sent to your inbox. You can unsubscribe at any time, and we will never share your details with third parties.
Medical research progress and health news
The latest engineering, electronic and technological developments
The most comprehensive technology news report on the Internet