Xiong, Zhenjun; Li, Xiuhong; Wang, Jie; Lin, Jinyou

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

2022, 219, 0141-8130

Xiong, Zhenjun; Li, Xiuhong; Wang, Jie; Lin, Jinyou

Particulate matter (PM) pollution poses a serious threat to public health, disposable and degradable filter ma-terials are expected to handle the problem in the future. Here, polyvinyl alcohol (PVA)/borax/cellulose nano -fibrils (CNF) aerogels were implanted on a biodegradable corrugated paper to form composite air filters for the first time via freeze-drying the coated composite hydrogels. The low content of CNF and PVA could be cross -linked by borax to form hydrogels, which enhanced its maneuverability for surface implanting on the sub-strate. More importantly, the addition of CNF greatly enriched the pore structure of aerogels, which provided a structural basis for PM capture. The as-prepared composite air filters exhibited excellent filtration efficiencies of 92 % and 96 % toward PM1.0 and PM3.0, respectively. Moreover, the addition of dimethylol-5,5-dimethylhydantoin endowed the filters with an antibacterial property. This work shows a new possibility for the design of degradable and functional filter materials.