Large-scale preparation of polylactic acid/polyethylene glycol micro/nanofiber fabrics with aligned fibers via a post-drafting melt blown process

Polylactic acid (PLA) micro/nanofiber fabrics with good biodegradability and biocompatibility have wide applications in the medical protective field. However, poor flexibility, high brittleness, insufficient mechanical properties of PLA remain challenging. Herein, a polylactic acid/polyethylene glycol (PLA/PEG) fabric aligned fibers was successfully prepared by an inexpensive straightforward post-drafting melt blown process. The experimental results showed that PEG can reduce Tg PLA, improve mobility molecular chains, complex viscosity PLA/PEG blends, play role plasticization. had micro/nanofibrous structure, average fiber diameter easily adjusted from 10.7 to 4.9 ?m tailoring process parameters, i.e., die temperature hot air temperature. Moreover, breaking tensile strength increased 45.06 78.73 N machine direction (MD), while it 11.87 21.89 cross (CD), which means enhanced significantly adjusting Furthermore, samples softness score 82.7, large synthetic blood contact angle 125.7°, excellent bursting 58.5 N. These are ideal candidates for such as surgical gowns, protection suits, masks, bandages.