"Roll-to-Roll Transfer of Electrospun Nanofiber Film for High-Efficiency Transparent Air Filter"

Jinwei Xu: Chong Liu, Po-Chun Hsu, Kai Liu, Rufan Zhang, Yayuan Liu, and Yi Cui; Nano Letters, 01/20/16.

Additional Authors: Chong Liu, Po-Chun Hsu, Kai Liu, Rufan Zhang, Yayuan Liu, and Yi Cui

Abstract:

Abstract Image

Particulate matter (PM) pollution in air has become a serious environmental issue calling for new type of filter technologies. Recently, we have demonstrated a highly efficient air filter by direct electrospinning of polymer fibers onto supporting mesh although its throughput is limited. Here, we demonstrate a high throughput method based on fast transfer of electrospun nanofiber film from roughed metal foil to a receiving mesh substrate. Compared with the direct electrospinning method, the transfer method is 10 times faster and has better filtration performance at the same transmittance, owing to the uniformity of transferred nanofiber film (>99.97% removal of PM2.5 at ∼73% of transmittance). With these advantages, large area freestanding nanofiber film and roll-to-roll production of air filter are demonstrated.