Accademia La Maison de la Danse Srld Italy

Filter paper usually removes particles based on five physical effects: gravity, collision, screening, diffusion, and

static electricity.6 The removal efficiency of filter paper is closely related to the relative size of the particle diameter

and the paper pore size. Smaller pore sizes of the paper correspond to smaller sizes of the particles that it can intercept

under the same filtration efficiency.7,8 Adjusting the structure of the filter paper to improve the air flow resistance can

increase the residence time of the pollutant particles in the filter paper, resulting in a higher removal efficiency.9,10

However, the filter filtration resistance directly affects the energy consumption of the pressure leaf filter, such that extremely high

filtration resistances are not recommended.11 The filtration efficiency has exhibited dependence on the fiber coarseness.

Specifically, finer fibers have exhibited higher filtration efficiencies at a constant pressure drop.12 However, air filter

paper must maintain a certain porosity to allow air flow. Nanofibers can increase the specific surface area of the filter

paper to generate filter papers with small pore sizes, high filtration efficiencies, and high porosities.