Park Kyu-Tae, Hwang Jungho
Mechanical Engineering Department, Yonsei University, Seoul, Republic of Korea.
Carbon N Y. 2014 Aug;75:401-410. doi: 10.1016/j.carbon.2014.04.019. Epub 2014 Apr 13.
Carbon nanotubes (CNTs) were coated on a sample of glass fiber air filter medium at atmospheric pressure and room temperature using electro-aerodynamic deposition (EAD). In the EAD method, CNTs (diameter: 50 nm, length: 2-3 μm) were aerosolized, electrically charged, and injected through a nozzle. A voltage was applied externally between the ground nozzle and a planar electrode on which the sample was located. The charged CNTs were deposited on the sample in a vertically standing posture even at a low flow velocity. Before the deposition experiment, a calculation was performed to determine the applied voltage by simulating the electric field, flow field, and particle trajectory. Using CNT-coated filter samples, virus aerosol filtration and anti-viral tests were carried out using the aerosol number counting method and the plaque counting method, respectively. For this purpose, bacteriophage MS2 was aerosolized with an atomizer. The particle filtration efficiency was increased to 33.3% in the most penetration particle size zone (100 nm) and the antiviral efficiency of the CNT filter was 92% when the coating areal density was 1.5 × 10 #/cm. The susceptibility constant of virus to CNTs was 0.2 cm/μg.
在大气压力和室温下，使用电空气动力学沉积（EAD）法将碳纳米管（CNT）涂覆在玻璃纤维空气过滤介质样品上。在EAD法中，碳纳米管（直径：50纳米，长度：2 - 3微米）被雾化、充电，并通过喷嘴注入。在接地喷嘴和放置样品的平面电极之间外部施加电压。即使在低流速下，带电的碳纳米管也会以垂直站立的姿势沉积在样品上。在沉积实验之前，通过模拟电场、流场和粒子轨迹进行计算以确定施加电压。使用涂覆有碳纳米管的过滤样品，分别采用气溶胶数计数法和噬菌斑计数法进行病毒气溶胶过滤和抗病毒测试。为此，用雾化器将噬菌体MS2雾化。在最易穿透粒径区（100纳米），颗粒过滤效率提高到33.3%，当涂层面密度为1.5×10#/厘米时，碳纳米管过滤器的抗病毒效率为92%。病毒对碳纳米管的敏感性常数为0.2厘米/微克。
