Bamboo Cellulose Modified Nanofiber Membrane and Its Effect on the Performance of Air Filtration Materials

ABSTRACT Fibrous air filtration materials are crucial for protecting the human body from particulate matter contamination. In this paper, BC/PAN nanofibrous membranes (BPM) were prepared using electrostatic spinning, employing bamboo cellulose (BC) modified polyacrylonitrile (PAN) nanofilter membranes to enhance their filtration and mechanical properties. The addition of BC led to a significant refinement of the PAN fibers, reducing fiber diameter. The mechanical properties of BC/PAN first improved and then declined as BC concentration increased, with BPM‐1.25 showing the best performance, exhibiting a tensile strength 1.94 times higher than BPM‐0. BC/BPM has a significantly higher filtration efficiency for all sizes of particles (BPM‐1.0 has a filtration efficiency of 96.23% for PM1.0, which is higher than the 88.25% under BPM‐0 conditions). BPM‐0 broke after 5000 blows, whereas BPM‐1.0 maintained good filtration efficiency after 10,000 blows. The analysis concluded that an optimal amount of BC could promote entanglement between BC and PAN molecules and refine electrostatically spun fiber diameter, improving nanofiber membrane mechanical properties and air filtration performance. This study offers valuable insights for developing new air filtration materials.