Abstract View
Fabrication of Silver Nanowire Coated Fibrous Air Filter Medium via a Two-Step Process of Electrospinning and Electrospray for Anti-Bioaerosol Treatment
KYUHYUN PARK, Jungho Hwang, Yonsei University, Republic of Korea
Abstract Number: 49
Working Group: Bioaerosols
Abstract
Airborne microorganisms have been lots of interesting issues in any environment than 20 years ago. Also, particle filtration field has been growing up together as airborne microorganism occurs problem as SARS or MERS. Therefore, various filters have been developed and invented for figuring out problems of airborne microorganism.
Electrospinning and electrospraying method are used for fabricating and coating the web. Electrospinning and electrospraying process stand to reason for making and coating the filter because two processes can be used by only replacing the solution in the syringe.
Silver nanowire coated nanofiber web’s filtration efficiency and pressure drop were measured to evaluate performance test. Aerosolizing prepared bacteria which were bacillus cereus, staphylococcus aureus, and micrococcus luteus and virus which was MS2 bacteriophage carried out for performance test of silver nanowire coated nanofiber web. Filtration efficiency of prepared nanofiber webs was measured upstream and downstream of the particle concentrations by aerosolizing prepared bacteria and virus. The concentration of bacteria and virus was measured by using an aerodynamic particle sizer (APS) and a scanning mobility particle sizer (SMPS). By using a differential pressure gauge, the pressure drop was measured between upstream and downstream.
For anti-microorganism test, pristine nanofiber filter and silver nanowire coated filter were used for comparison. Colony counting method and plaque counting method were used to get anti-bacterial efficiency and anti-viral efficiency. These efficiencies show a similar tendency which anti-microorganism was increased with increase of silver nanowire’s coating time.
Filtration test of silver nanowire coated electrospun nanofiber web is evaluated by using APS and SMPS. Anti-bacterial and anti-viral ability of the web are also evaluated by using CFU and PFU assay. The silver nanowire coated electrospun nanofiber web is evaluated to prove increase of the filtration efficiency and antimicrobial ability with increase of coating areal density of silver nanowire and slightly increase of pressure drop.