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《工程(英文)》 >> 2022年 第9卷 第2期 doi: 10.1016/j.eng.2021.07.022

应对新冠肺炎疫情的高性能可重复使用平面口罩的制备

a State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
b Dawn Polymer (Beijing) Technology Co., Ltd., Beijing 101599, China
c Beijing Municipal Institute of Labor Protection, Beijing 100054, China
d Beijing Institute of Medical Device Testing, Beijing 101111, China
e School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China

收稿日期: 2021-01-18 修回日期: 2021-07-21 录用日期: 2021-07-21 发布日期: 2021-11-03

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摘要

新冠病毒肺炎(COVID-19)疫情已导致全球对口罩的需求激增。然而,口罩的大量消耗也引起人们对环境污染和资源浪费问题的担忧。本研究制备了一种基于聚丙烯熔喷布(mb-PP)的高性能可重复使用平面口罩,并测试了6 种常用消毒方法和口罩佩戴时长对其可重复使用性能的影响。结果表明,使用其中最易行的消毒方法(70 ℃热水浸泡30 min)进行三个消毒循环处理后,口罩的颗粒过滤效率(PFE)几乎不变。进一步研究表明,对于佩戴时长累计达24 h 并经三次热水消毒法处理后的口罩,其PFE 仍高达91.3%,平均细菌检出菌落数和真菌检出菌落数分别为9.2 CFU∙g−1和51.6 CFU∙g−1,未检出大肠杆菌和化脓性致病菌,口罩的滤效和微生物指标均优于《可重复使用民用口罩》的团体标准(T/B JFX 0001—2020)。此外,纹影摄影技术对在佩戴口罩过程中气流散播范围的研究也表明,经佩戴和消毒处理后的可重复使用口罩仍可高效降低呼出气体的散播范围。

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