Electrospinning Machine | Sustainable biomass-based filter forhigh-efficiency PM0.3filtration

Challenge: Current common air filter materials are mainly made from petrochemical-based materials such as polyester (PET) and polypropylene (PP). Although they have high filtration efficiency, they are difficult to degrade and pose a serious environmental burden. Converting agricultural waste into green, high-performance filter materials is of great practical significance for developing the rural economy and helping to achieve the dual-carbon goals. 

Method: Professors Guangping Han, Wanli Cheng, and Associate Professor Dong Wang from Northeast Forestry University, Professors Bin Ding and Shichao Zhang from Donghua University, Associate Professor Yiy-ing Yue from Nanjing Forestry University, and Professor Yan Wei from Tsinghua University collaborated to use agricultural residues (zein and corn straw cellulose) to construct a dual-network filter material with interwoven micro-nano fibers through electrospinning. 

Innovation 1: Generated micron-sized fibers with a grooved surface structure (average diameter about 2.6 ± 1.1 μm). Meanwhile, the added cellulose nanofibers (CNFs) significantly enhanced the system's viscoelasticity and shear response, promoting the splitting of the main jet to generate nanofibers with an average diameter of about 290 ± 180 nm. 

Innovation 2: This filter material does not rely on any petrochemical polymers or toxic solvents, achieves high PM0.3 removal efficiency (99.9994%) and low pressure drop (45 Pa), and can be completely degraded in the natural environment.

 https://doi.org/10.1038/s41467-025-61863-2