This work aimed to determine filtration performance of polypropylene hollow-fibre membranes (HFMs) for removing submicron particles from air. Experiments were performed in a glass chamber supplied with a nanoaerosol particles formed by burning incense sticks. Three types of HFMs varying in packing density, active filtration area and pore-size distribution were tested in an outside-in configuration. By measuring the number of particles upstream and downstream of the HFM, the filtration efficiency was determined. Three permeate velocities (5, 10 and 15 cm/s) were used to compare the velocity effect on filtration efficiency. Particle counting was carried out using a TSI 3075 condensation particle counter connected to a TSI 3080 scanning mobility particle sizer in 48 particle size channels from 18.1 to 100 nm. The results show high efficiency, mostly higher than 99% for particles above 60 nm size. The most penetrating particle sizes (MPPS) were between 35.9 and 40 nm at 5 cm/s with an efficiency of 82–86%. At permeate velocity of 10 and 15 cm/s, MPPS slightly decreased to range of 34.6–40 nm, with efficiency decreasing to 72–84% and 69–83%, respectively. The quality factor of HFMs was within the 2–28 kPa⁻¹ range.

这项工作旨在确定聚丙烯中空纤维膜（HFM）用于从空气中去除亚微米颗粒的过滤性能。在装有通过燃烧香棒形成的纳米气溶胶颗粒的玻璃室中进行实验。在由内而外的配置下测试了三种堆积密度，有效过滤面积和孔径分布不同的HFM。通过测量HFM上游和下游的颗粒数，可以确定过滤效率。使用三个渗透速度（5、10和15 cm / s）来比较速度对过滤效率的影响。使用连接到TSI 3080扫描迁移率粒度仪的TSI 3075冷凝颗粒计数器在48个粒径为18.1到100 nm的通道中进行颗粒计数。结果表明效率高，对于尺寸大于60 nm的粒子，大多数情况下高于99％。在5 cm / s时，最具穿透力的粒径（MPPS）在35.9至40 nm之间，效率为82–86％。在渗透速度为10和15 cm / s时，MPPS略微下降至34.6–40 nm的范围，效率分别下降至72–84％和69–83％。HFM的品质因数在2–28 kPa之内^-1范围。