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疫情期间口罩和自制呼吸防护设备的尺寸和时间依赖性颗粒物去除效率。

Size- and Time-Dependent Particle Removal Efficiency of Face Masks and Improvised Respiratory Protection Equipment Used during the COVID-19 Pandemic.

机构信息

Jožef Stefan Institute, Jamova Cesta 39, 1000 Ljubljana, Slovenia.

Novo Mesto General Hospital, Šmihelska Cesta 1, 8000 Novo Mesto, Slovenia.

出版信息

Sensors (Basel). 2021 Feb 24;21(5):1567. doi: 10.3390/s21051567.

DOI:10.3390/s21051567
PMID:33668141
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7956512/
Abstract

Size- and time-dependent particle removal efficiency (PRE) of different protective respiratory masks were determined using a standard aerosol powder with the size of particles in the range of an uncoated SARS-CoV-2 virus and small respiratory droplets. Number concentration of particles was measured by a scanning mobility particle sizer. Respiratory protective half-masks, surgical masks, and cotton washable masks were tested. The results show high filtration efficiency of FFP2, FFP3, and certified surgical masks for all sizes of tested particles, while protection efficiency of washable masks depends on their constituent fabrics. Measurements showed decreasing PRE of all masks over time due to transmission of nanoparticles through the mask-face interface. On the other hand, the PRE of the fabric is governed by deposition of the aerosols, consequently increasing the PRE.

摘要

采用标准气溶胶粉末，研究了不同防护口罩的粒径和时间依赖性颗粒去除效率（PRE），该粉末中颗粒的粒径范围为未涂层的 SARS-CoV-2 病毒和小呼吸飞沫。通过扫描迁移率颗粒分析仪测量颗粒的数浓度。测试了半面罩、外科口罩和可清洗棉质口罩。结果表明，FFP2、FFP3 和经过认证的外科口罩对所有测试粒径的颗粒均具有高过滤效率，而可清洗口罩的保护效率取决于其组成织物。测量结果表明，由于纳米颗粒通过口罩-面部界面的传输，所有口罩的 PRE 随时间降低。另一方面，织物的 PRE 受气溶胶沉积的控制，因此 PRE 增加。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/4a8d4727c654/sensors-21-01567-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/91f731b3571a/sensors-21-01567-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/93bfe4797a54/sensors-21-01567-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/518bd564c1d3/sensors-21-01567-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/e9584caf3a02/sensors-21-01567-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/038e906a35f2/sensors-21-01567-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/b963b4c47bfa/sensors-21-01567-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/b7cc9f0d5b8e/sensors-21-01567-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/ac9cdc63470d/sensors-21-01567-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/d83731680cc1/sensors-21-01567-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/217f3ae2e215/sensors-21-01567-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/06c5cdbaad4c/sensors-21-01567-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/4a8d4727c654/sensors-21-01567-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/91f731b3571a/sensors-21-01567-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/93bfe4797a54/sensors-21-01567-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/518bd564c1d3/sensors-21-01567-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/e9584caf3a02/sensors-21-01567-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/038e906a35f2/sensors-21-01567-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/b963b4c47bfa/sensors-21-01567-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/b7cc9f0d5b8e/sensors-21-01567-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/ac9cdc63470d/sensors-21-01567-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/d83731680cc1/sensors-21-01567-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/217f3ae2e215/sensors-21-01567-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/06c5cdbaad4c/sensors-21-01567-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f9a/7956512/4a8d4727c654/sensors-21-01567-g012.jpg

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