Large-Scale Nanofiber Manufacturing| Ultralight Electrospun Composite Filters with Vertical TernarySpatial Network for High-Performance PMo: Purification

Professor Qin Xiaohong et al. from Donghua University: Ultralight Electrospun Composite Filters for High-Performance PM0.3 Purification

Challenge: Due to extensive consumption of filtration media, air pollutants - particularly highly permeable particulate matter (PM) - threaten public health and environmental sustainability. Existing melt-blown nonwoven filters face challenges in removing PM0.3, energy consumption, and processing burdens.

Approach: Professor Qin Xiaohong from Donghua University and Professor Tan Swee Ching from National University of Singapore collaborated to develop an ultralight composite filter with vertical ternary spatial network (TSN) structure using combined electrospinning and electrospraying. This approach saved approximately 98% of raw material usage and reduced manufacturing time by 99.4%, while achieving high-efficiency PM0.3 removal (≥99.92%) and eco-friendly regeneration.

Innovation 1: The TSN filter consists of a hybrid layer of microspheres (average diameter ≈1 μm)/ultrafine nanofibers (≈20 nm). This structure features high porosity (≈85%), ultralow areal density (<1 g m−2), and low airflow resistance (<90 Pa), ensuring excellent thermal comfort.

Innovation 2: Using scalable one-step free-surface electrospinning technology, TSN mats can be mass-produced at 60 meters per hour (1.6-meter width).