Abstract
• Fabrication of PVA/CNCs filter was effectively optimized via RSM. • Removal efficiency of 94% was achieved, while pressure drop was only 34.9 Pa. • Integral effect of electrospinning suspension on filter performance was studied. • More integrate and accurate results were provided by RSM. • RSM saves experimental runs and costs. A Poly(vinyl alcohol) (PVA)/cellulose nanocrystals (CNCs) composite nanofibrous air filter was fabricated via electrospinning. CNCs were added to improve the overall filtration performance for particulate matter (PM) removal. The integral effect of different properties of electrospinning suspension on the PM 2.5 removal efficiency and pressure drops were studied. To optimize the fabrication parameters, variables such as suspension concertation and CNCs percentage at different levels were systematically investigated using response surface methodology. The feasible operating space, where the suspension concentration and CNCs percentage were varied from 6 to 8% and 5 to 20%, respectively, was evaluated with reduced experimental runs using a face-centered central composite design. Our results indicate the quadratic models developed for predicting responses were adequate. The optimum filtration performance for PM 2.5 was achieved with 7.34% of suspension concentration and 20% of CNCs percentage, where the removal efficiency was 94% and the pressure drop was only 34.9 Pa.
Published Version
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