Powder and Ceramics Division, Korea Institute of Materials and Science, Changwondaero 797, Seongsan-gu, Changwon, 51508, Republic of Korea.
Center for Environment, Health, and Welfare Research, Korea Institute of Science and Technology (KIST), Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea; Aerosol and Bioengineering Laboratory, Department of Engineering, Konkuk University, Neungdong-ro 120, Gwangjin-gu, Seoul, 05029, Republic of Korea.
J Hazard Mater. 2018 Jun 5;351:29-37. doi: 10.1016/j.jhazmat.2018.02.043. Epub 2018 Feb 24.
Here, we introduce a reusable bifunctional polyester/aluminum (PET/Al) air filter for the high efficiency simultaneous capture and inactivation of airborne microorganisms. Both bacteria of Escherichia coli and Staphylococcus epidermidis were collected on the PET/Al filter with a high efficiency rate (∼99.99%) via the electrostatic interactions between the charged bacteria and fibers without sacrificing pressure drop. The PET/Al filter experienced a pressure drop approximately 10 times lower per thickness compared with a commercial high-efficiency particulate air filter. As the Al nanograins grew on the fibers, the antimicrobial activity against airborne E. coli and S. epidermidis improved to ∼94.8% and ∼96.9%, respectively, due to the reinforced hydrophobicity and surface roughness of the filter. Moreover, the capture and antimicrobial performances were stably maintained during a cyclic washing test of the PET/Al filter, indicative of its reusability. The PET/Al filter shows great potential for use in energy-efficient bioaerosol control systems suitable for indoor environments.
在这里，我们介绍了一种可重复使用的多功能聚酯/铝（PET/Al）空气过滤器，用于高效同时捕获和灭活空气中的微生物。带电荷的细菌与纤维之间的静电相互作用使大肠杆菌和表皮葡萄球菌这两种细菌高效地（99.99%）收集在 PET/Al 过滤器上，而不会牺牲压降。与商业高效空气过滤器相比，PET/Al 过滤器的每单位厚度的压降约低 10 倍。随着纤维上 Al 纳米颗粒的生长，对空气中大肠杆菌和表皮葡萄球菌的抗菌活性分别提高到94.8%和~96.9%，这归因于过滤器增强的疏水性和表面粗糙度。此外，在 PET/Al 过滤器的循环清洗测试中，捕获和抗菌性能稳定保持，表明其可重复使用。该 PET/Al 过滤器在适用于室内环境的节能生物气溶胶控制系统中有很大的应用潜力。
