| Popis: |
Nanofibrous filter media used for filtration of nanoparticles dispersed in air can be produced by electrospinning of polymer solutions. However, this process is influenced by many operating variables, including the solution feed conditions. In this work, a 2³ factorial design was used to evaluate the influence of electrospinning variables on the morphology and performance characteristics of filter media composed of polyvinyl alcohol (PVA) nanofibers. The variables considered were needle-collector distance, collector rotation speed, and spinning time. The dependent variables were the median and geometric standard deviation of the fiber diameter distribution, the overall efficiency for collection of NaCl particles (5.94–224.7 nm), and the initial pressure drop. It was found that the needle-collector distance had the most significant influence on the output variables, especially for the median fiber diameter and the initial pressure drop. For these variables, the fitted curves provided coefficient of determination (R²) values of 0.98 and 0.96, respectively. |
