Development of Electrospun Nanofibrous Filters for Controlling Coronavirus Aerosols,Environmental Science & Technology Letters

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Development of Electrospun Nanofibrous Filters for Controlling Coronavirus Aerosols
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-05-17 , DOI: 10.1021/acs.estlett.1c00337
Hongchen Shen ₁ , Zhe Zhou ₁ , Haihuan Wang _{1,

2} , Mengyang Zhang ₁ , Minghao Han ₂ , David P Durkin ₃ , Danmeng Shuai ₁ , Yun Shen ₂

Affiliation

Airborne transmission of SARS-CoV-2 plays a critical role in spreading COVID-19. To protect public health, we designed and fabricated electrospun nanofibrous air filters that hold promise for applications in personal protective equipment (PPE) and the indoor environment. Due to ultrafine nanofibers (∼300 nm), the electrospun air filters had a much smaller pore size in comparison to the surgical mask and cloth masks (a couple of micrometers versus tens to hundreds of micrometers). A coronavirus strain served as a SARS-CoV-2 surrogate and was used to generate aerosols for filtration efficiency tests, which can better represent SARS-CoV-2 in comparison to other agents used for aerosol generation in previous studies. The electrospun air filters showed excellent performance by capturing up to 99.9% of coronavirus aerosols, which outperformed many commercial face masks. In addition, we observed that the same electrospun air filter or face mask removed NaCl aerosols equivalently or less effectively in comparison to the coronavirus aerosols when both aerosols were generated from the same system. Our work paves a new avenue for advancing air filtration by developing electrospun nanofibrous air filters for controlling SARS-CoV-2 airborne transmission.

中文翻译：

开发用于控制冠状病毒气溶胶的电纺纳米纤维过滤器

SARS-CoV-2 的空气传播在 COVID-19 的传播中发挥着关键作用。为了保护公众健康，我们设计并制造了静电纺丝纳米纤维空气过滤器，有望在个人防护装备 (PPE) 和室内环境中得到应用。由于采用超细纳米纤维（~300 nm），静电纺空气过滤器的孔径比外科口罩和布口罩小得多（几微米对几十到几百微米）。冠状病毒株作为 SARS-CoV-2 的替代品，用于产生用于过滤效率测试的气溶胶，与之前研究中用于产生气溶胶的其他试剂相比，它可以更好地代表 SARS-CoV-2。静电纺丝空气过滤器表现出优异的性能，可捕获高达 99.9% 的冠状病毒气溶胶，其性能优于许多商用口罩。此外，我们观察到，当两种气溶胶由同一系统产生时，与冠状病毒气溶胶相比，相同的电纺空气过滤器或面罩去除氯化钠气溶胶的效果相同或较差。我们的工作通过开发电纺纳米纤维空气过滤器来控制 SARS-CoV-2 空气传播，为推进空气过滤开辟了一条新途径。

更新日期：2021-07-13

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