A Portable High-Efficiency Multi-Material Electrospinning Device with Low Environmental Dependence

The emergence of handheld in situ electrospinning systems provides an effective method to broaden the applications of electrospinning in areas such as emergency rescue, disaster relief, and pollution prevention. However, their further development is significantly hindered by low efficiency and the considerable impact of external environmental factors. Furthermore, their functionality is restricted due to the use of single-material electrospinning. Here, a low environment-dependent, portable, high-speed multi-material electrospinning device (LEPHE) is proposed based on a gas-electric coupling field. With an internal electric field and airfield, LEPHE can decouple the electrospinning process into two stages: jet formation and delivery. This design eliminates the effects of environmental factors on film formation, which are common challenges in traditional electrospinning. By utilizing a multi-needle gas-electric coupling field head with alternating bifurcated channels inside, LEPHE significantly improves efficiency and allows for in situ composite film preparation. Experimental results demonstrate the system's excellent environment adaptability, high spinning efficiency, and good uniformity in film formation. Additionally, LEPHE is capable of achieving uniformly mixed deposition of multi-material fibers. It allows for the on-demand stacking of various material layers and the adjustment of material proportions in single layers to create composite films.