| خلاصه مقاله | Abstract:
Air pollution is a growing worldwide concern due to its adverse effects on human health and the
environment. The enhanced filtration performance, low resistance, low cost, and high surface-tovolume ratio make nanofibers an attractive material for many applications such as healthcare,
energy, and air filtration. Recently, electrospun nanomembranes have been used for effective air
filtration owing to their potential for active surface modification. The purpose of this study was to
synthesize polyurethane (PU) nanofiber membrane incorporated with different amounts of β–
cyclodextrin (β-CD) to capture Volatile Organic Compounds (VOCs) along with aerosol filtration
from the air. The utilized VOC for evaluating the capturing efficiency was toluene. The PU was
based on 4, 4- Methylene diphenyl diisocyanate (MDI) as the hard segment and 1, 4 butanediol
and polytetetramethylene ether glycol (PTMG) as the soft segment. The membranes were
fabricated by electrospinning in N, N-dimethylformamide solutions to form nano-sized fibers. The
chemical structure and morphology of the produced samples were assessed by FTIR and SEM,
respectively. The highest filtration performance was observed for PU with 1 wt% β-CD nanofiber.
Due to high efficiency (83.13%) and low-pressure drop (∆P =19 pa), this sample had a
considerable quality parameter. The results demonstrated that the membrane which was loaded
with β-CD was able to adsorb hazardous and carcinogenic VOCs. It was confirmed that adding β-
CD into PU improves the absorption capacity due to forming π complex and having a different
tendency against capturing the variety of VOCs. The PU with 3 wt% β-CD nanofiber sample was
recognized with the highest absorption efficiency against Toluene. Overall, the outputs of study
revealed that the selectivity of the PU fibers toward VOC vapors, along with the ease of
regeneration, can make them attractive for VOC filtration |