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Nano-dry-salt deposition on electret nonwoven confers anticoronaviral effect while retaining aerosol filtration performance
Environmental Science: Nano ( IF 7.3 ) Pub Date : 2021-08-24 , DOI: 10.1039/d1en00369k
Dae Hoon Park 1 , Jisoo Choi 1 , Amin Piri 1 , Jungho Hwang 1 , Jeong Hoon Byeon 2
Affiliation  

Safe-by-design concepts for anticoronaviral functions are important in the production of air filters, face masks, and touch substrates because these interventions may be effective in allowing continued socioeconomic activity and alleviation of the global recession. Recent attempts to provide anticoronaviral functions have involved alternative compositions and architectures aimed at producing nanoscale compounds for highly effective anticoronaviral activities. However, translating the nanocompounds to the field requires considerable investment and time as well as actual trials; thus, they may not be a viable option for timely deployment during the COVID-19 pandemic. With these considerations in mind, we have used sodium chloride, which is generally recognized as safe (GRAS), to functionalize nonwoven sheets as frequently touched surfaces. Specifically, we produced nano-dry-salt (NDS) particles through Collison-type atomization and subsequent diffusion drying, and these NDS particles were finally deposited on electret meltblown nonwovens in a single-pass air flow. The resulting GRAS NDS deposited electret nonwovens were examined for effectiveness in anticoronaviral function and aerosol filtration with pressure drop. The treated nonwovens exhibited significant inactivation of airborne human coronaviruses (surrogates of SARS-CoV-2) while retaining the original filtration performance, even under saliva droplet and dust exposures. Several realizable platforms can thus be presented to quickly incorporate NDS deposition in conventional nonwoven production.

中文翻译:

驻极体非织造布上的纳米干盐沉积具有抗冠状病毒作用,同时保持气溶胶过滤性能

抗冠状病毒功能的安全设计概念在空气过滤器、口罩和触摸基板的生产中很重要,因为这些干预措施可能有效地促进社会经济活动的持续和缓解全球经济衰退。最近提供抗冠状病毒功能的尝试涉及替代组合物和结构,旨在生产用于高效抗冠状病毒活性的纳米级化合物。然而,将纳米化合物应用于该领域需要大量投资和时间以及实际试验;因此,它们可能不是在 COVID-19 大流行期间及时部署的可行选择。考虑到这些因素,我们使用公认安全 (GRAS) 的氯化钠将无纺布片材作为经常接触的表面进行功能化。具体来说,我们通过 Collison 型雾化和随后的扩散干燥生产纳米干盐 (NDS) 颗粒,这些 NDS 颗粒最终在单程气流中沉积在驻极体熔喷非织造布上。检查所得的 GRAS NDS 沉积驻极体非织造布在抗冠状病毒功能和带压降的气溶胶过滤方面的有效性。处理过的非织造布对空气传播的人类冠状病毒(SARS-CoV-2 的替代物)表现出显着的灭活,同时保持原始的过滤性能,即使在唾液和灰尘暴露下也是如此。因此,可以提供几个可实现的平台,以在传统的非织造布生产中快速整合 NDS 沉积。这些 NDS 颗粒最终在单程气流中沉积在驻极体熔喷非织造布上。检查所得的 GRAS NDS 沉积驻极体非织造布在抗冠状病毒功能和带压降的气溶胶过滤方面的有效性。处理过的非织造布对空气传播的人类冠状病毒(SARS-CoV-2 的替代物)表现出显着的灭活,同时保持原始的过滤性能,即使在唾液和灰尘暴露下也是如此。因此,可以提供几个可实现的平台,以在传统的非织造布生产中快速整合 NDS 沉积。这些 NDS 颗粒最终在单程气流中沉积在驻极体熔喷非织造布上。检查所得的 GRAS NDS 沉积驻极体非织造布在抗冠状病毒功能和带压降的气溶胶过滤方面的有效性。处理过的非织造布对空气传播的人类冠状病毒(SARS-CoV-2 的替代物)表现出显着的灭活,同时保持原始的过滤性能,即使在唾液和灰尘暴露下也是如此。因此,可以提供几个可实现的平台,以在传统的非织造布生产中快速整合 NDS 沉积。处理过的非织造布对空气传播的人类冠状病毒(SARS-CoV-2 的替代物)表现出显着的灭活,同时保持原始的过滤性能,即使在唾液和灰尘暴露下也是如此。因此,可以提供几个可实现的平台,以在传统的非织造布生产中快速整合 NDS 沉积。处理过的非织造布对空气传播的人类冠状病毒(SARS-CoV-2 的替代物)表现出显着的灭活,同时保持原始的过滤性能,即使在唾液和灰尘暴露下也是如此。因此,可以提供几个可实现的平台,以在传统的非织造布生产中快速整合 NDS 沉积。
更新日期:2021-08-27
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