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. 2021 Sep 11;279:119625. doi: 10.1016/j.seppur.2021.119625

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Fig. 5 — (a) Filtration efficiency of nanofibrous air filter membrane based on hydrophobic PVDF and amphiphilic PVDF-g-POEM double comb copolymer as a function of pressure drop, (b) Filtration efficiency and pressure drop of hydrophobic PVDF based nanofibrous air filter membrane as a function of basis weights, (c) amphiphilic PVDF-g-POEM double comb copolymer based nanofibrous air filter membrane as a function of basis weights and (d) quality factor of nanofibrous air filter membrane based on hydrophobic PVDF and amphiphilic PVDF-g-POEM double comb copolymer as a function of mass area.