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杀菌紫外线不会损坏或阻碍N95口罩在多次使用后的性能
Zhe Zhao1, Zhaobo Zhang2, Mariana Lanzarini-Lopes1
1NSF Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, Arizona 85287-3005, United States.
Environmental science & technology letters
|August 11, 2023
概括
紫外线辐射有效消毒N95和外科面罩,而不会影响颗粒过或材料完整性. 这项研究支持安全重复使用口罩,解决流行病期间严重的个人防护设备 (PPE) 短缺问题.
科学领域:
- 生物医学工程 生物医学工程
- 传染病控制和控制传染病
- 材料科学 材料科学 材料科学
背景情况:
- 随着COVID-19大流行,全球对个人防护设备 (PPE) 的需求激增,特别是N95和医护人员的手术口罩.
- 消毒和重复使用这些口罩是一个潜在的短期解决方案,以满足紧急需求.
- 杀菌性紫外线 (UV) 光是一种非化学方法,用于使表面上的病毒失活.
研究的目的:
- 评估UV-C辐射对N95和手术口罩的消毒和可重复使用的有效性和安全性.
- 评估UV-C处理对口罩材料物理和过性能的影响.
- 根据科学发现,开发一种面具处理和重复使用的实用系统.
主要方法:
- N95级和非N95级的手术口罩被辐射了254nm和265nm紫外线C光,剂量为1和10J/cm2.
- 在UV-C处理后,面具被测试了它们在去除气溶病毒大小颗粒的能力.
- 在辐射后分析了材料特性,包括聚合物结构,形态,表面疏水性,压力下降和拉伸强度.
- 使用了不同的紫外线光源,包括低压紫外线灯和发光二极管.
主要成果:
- 在测试的波长和剂量中,UV-C辐射不会对口罩的颗粒去除效率产生不利影响.
- 在面具材料的聚合物结构,形态或表面水性方面没有观察到任何显著的变化.
- 关键的机械性能,如压力下降和抗拉强度,在UV-C处理后保持不变.
- 在不同的紫外线光源和口罩类型中,结果一致.
结论:
- 紫外线辐射是一种可行的消毒技术,可以使N95和外科口罩在不损害其保护能力的情况下重复使用.
- 这些发现支持开发面具再利用的处理系统和操作协议,这对于管理卫生危机期间的个人防护设备供应至关重要.
- 这项研究提供了技术经济分析和个人防护设备废弃物减少策略的生命周期评估的数据.
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