| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.84 |
| 발표분야 | 유ㆍ무기 나노섬유 소재 |
| 제목 | Filtration Characteristics of Electrospun Nanofiber Filter Media |
| 초록 | In air filtration, the fiber size plays a key role in determining filtration properties of filter media. Generally, finer fibers lead to lower air resistance and higher collection efficiency of fibrous filters. Therefore electrospun nanofiber materials have many advantages as a filter media attributed to the nano-scale fiber size in diameter. In this work, the filtration characteristics of electrospun nanofiber webs were systematically examined. Nanofiber webs were manufactured with various spinning conditions by a lab-scale electrospinning apparatus. The effect of processing variables of electrospinning on fiber size distribution and pore size distribution of the nanofiber webs was analyzed, and the filtration properties of the electrospun webs were measured and compared with a commercial air filter media composed of glass fibers. Fig. 1(a) is the fractional collection efficiency of electrospun filters made at various spinning voltages. As can be seen, the efficiency of electrospun filters is increased with increasing applied voltage. The collection efficiency of a filter is related to the fiber size, pore size, thickness of the filter. Since a filter electrospun at higher voltage has finer fibers and smaller pores, the collection efficiency of the filter becomes higher than that of filters made at lower spinning voltages. In Fig. 1(b), the collection efficiency of an electrospun filter media was compared with that of a glass fiber HEPA filter (tentative collection efficiency: 98% for 0.3 mm particles at filtration velocity of 5 cm/s). The pressure drops of the two filters at filtration velocity of 5 cm/s are 29.6 mmH2O for electrospun filter and 41.4 mmH2O for glass fiber filter, respectively. The collection efficiency of the electrospun filter media is almost same with that of the glass fiber HEPA filter media, but the pressure drop of the electrospun filter is only 75 % of that of the glass fiber filter. These results show the excellent filtration performance of electrospun nanofiber filters. (a) Effect of spinning voltage (b) Comparison with HEPA filter media Fig. 1. Collection efficiency of electrospun nanofiber filters. |
| 저자 | 박현설 |
| 소속 | 한국에너지기술(연) |
| 키워드 | Electrospinning; Nanofiber; Air Filter; Filtration |
