Electrospinning Machine | Ultralight Electrospun Composite Filters with Vertical Ternary Spatial Network for High-Performance PM0.3 Purification

Challenge: Due to the extensive consumption of filter media, air pollutants, especially highly permeable particulate matter (PM), threaten public health and environmental sustainability. Traditional melt-blown filters struggle to efficiently remove PM0.3, and have high raw material consumption and high manufacturing energy consumption. 

Method: Professor Qin Xiaohong from Donghua University and Professor Tan Swee Ching from the National University of Singapore, among others, collaborated to use a combination of electrospinning and electrospraying to develop an ultra-light composite filter with a vertical ternary spatial network (TSN) structure, saving about 98% of raw material usage and reducing manufacturing time by 99.4%, while achieving efficient removal of PM0.3 (≥99.92%), and environmentally friendly regeneration. 

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

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

 https://doi.org/10.1002/adma.202419389