Micron poly-L-lactide fibers fabricated by melt direct writing

Huichao Liu, Jingxin Kang, Yong Liu*

Abstract：Through three-dimensional (3D) printing pen methods on the high-voltage electrostatic field with a needle shaped collector, the refined poly-L-lactide (PLA) finished product has been achieved. Through orthogonal experimental methods, We found that optimal conditions at 180℃, a nozzle-to-needle shaped collector of 7 mm, and applied voltage at 45 kV with narrow variance distribution produce an average silk diameter reaching 517.1±24.9μm. 3D printed in a high voltage electrostatic field fibers are 0.5 times thinner than direct 3D printed fibers. Four polymer patterns have been precisely printed. It can be used to make ordered micron fiber pattern, such as the micro sensor, air ultrafiltration membrane, Proton exchange membrane. In this report, the morphology, structural changes of the fibers are characterized

Figure 1. Schematic diagram of a 3D printing pen on the high-voltage electrostatic field

Figure 2. The photos of (a) fibers written by a 3D printing pen; (b) multiple patterns printed by 3D printing pen on high-voltage electrostatic field.