Ultrafine polyamide-۶ nanofiber/nets membrane for effective air filtration

Particulate matter and spread of COVID-۱۹ caused by SARS-CoV-۲ are two of the most serious problems because of their significant threat to human health. Ultrafine and bimodal structured polyamide-۶ nanofiber/nets (PA-۶ NFN) membrane via one-step electrospinning/netting.The PA-۶ NFN membranes are combined of ultrafine (~۷۰ nm) nanofibers and covered two-dimensional (۲D) ultrathin (~۲۰ nm) nanonets which are optimized by facilely regulating the solution concentration, ionization of the solution by adding NaCl and applying a high voltage of ۲۲ kV are effective in forming this specific structure. With integrated properties of small pore size, high porosity, and high specific surface area, the resulting PA-۶ NFN membranes exhibit robust mechanical strength of ۱۲.۳۲ MPa, high filtration efficiency of ۹۹.۱۱% for the ۱۰۰ nm aerosol particles, low pressure drop of ۸۱Pa, higher quality factor compared to two standard commercial masks including Three-Ply surgical mask and respirator face mask, combined with large particle holding capacity of ۱۰۸ g/m۲ and ability to maintain conditions ۵ filtration cycles for filtrating ultrafine airborne particles. The diameter of the SARS-CoV-۲ ranged from ۶۰ to ۱۴۰ nm is considered, therefore PA-۶ NFN membranes could preventing dispersal of droplets and reduce the spread of COVID-۱۹ caused by SARS-CoV-۲. In addition, the filtration efficiency calculation results show that the good agreement with the measurement results. The fabrication of PA-۶ NFN medium makes it a promising candidate for PM۰.۳ governance at applications including face mask, protective clothing, clean room and engine intake.

کلیدواژه ها:

Nano fibers ، air filtration ، SARS-CoV-۲ ، Filtration fabrics ، Engineered textiles ، Technical textiles