TY - JOUR
T1 - Preparation of electrospun polyurethane filter media and their collection mechanisms for ultrafine particles
AU - Choi, Hyun Jin
AU - Kim, Sang Bum
AU - Kim, Sung Hyun
AU - Lee, Myong Hwa
N1 - Funding Information:
This research was financially supported by the Eco-innovation Project (Project number: 2012-00011-0002) through the Ministry of Environment, Republic of Korea.
PY - 2014
Y1 - 2014
N2 - Electrospinning is a simple and versatile process to produce polymer nanofibers, which are useful for ultrafine particle filtration. In this study, a polyurethane filter with an average fiber diameter of 150-250 nm was prepared through the electrospinning process and its filtration characteristics were investigated. We found that the electrospun fiber diameter was highly dependent on the polyurethane concentration, electric field, and tip-to-collector distance. As the polyurethane concentration, electric field, and tip-to-collector distance under the same electric field increased, the fiber diameter increased. We also found that the produced filter media had a minimum collection efficiency at particles sizes from 80 to 100 nm, which implies an electrostatic attraction between the filter and the test particles. Furthermore, we observed that interception was a predominant collection mechanism at Peclet numbers higher than 10 in nanofiber filtration for ultrafine particles. A polyurethane nanofiber filter with excellent mechanical properties was prepared, and the effect of operating conditions on fiber morphology was examined. The filter fabricated by an electrospinning process is charged and has high filtration efficiency due to electrostatic force. Therefore, it can be a good alternative to control hazardous ultrafine particles.
AB - Electrospinning is a simple and versatile process to produce polymer nanofibers, which are useful for ultrafine particle filtration. In this study, a polyurethane filter with an average fiber diameter of 150-250 nm was prepared through the electrospinning process and its filtration characteristics were investigated. We found that the electrospun fiber diameter was highly dependent on the polyurethane concentration, electric field, and tip-to-collector distance. As the polyurethane concentration, electric field, and tip-to-collector distance under the same electric field increased, the fiber diameter increased. We also found that the produced filter media had a minimum collection efficiency at particles sizes from 80 to 100 nm, which implies an electrostatic attraction between the filter and the test particles. Furthermore, we observed that interception was a predominant collection mechanism at Peclet numbers higher than 10 in nanofiber filtration for ultrafine particles. A polyurethane nanofiber filter with excellent mechanical properties was prepared, and the effect of operating conditions on fiber morphology was examined. The filter fabricated by an electrospinning process is charged and has high filtration efficiency due to electrostatic force. Therefore, it can be a good alternative to control hazardous ultrafine particles.
UR - http://www.scopus.com/inward/record.url?scp=84894057258&partnerID=8YFLogxK
U2 - 10.1080/10962247.2013.858652
DO - 10.1080/10962247.2013.858652
M3 - Article
C2 - 24701690
AN - SCOPUS:84894057258
SN - 1096-2247
VL - 64
SP - 322
EP - 329
JO - Journal of the Air and Waste Management Association
JF - Journal of the Air and Waste Management Association
IS - 3
ER -