无针熔体电纺PLA纳米纤维捻线的制备

Preparation of Needleness Melt Electrospinning PLA Nanofibers Twisting

环保无溶剂的熔体静电纺丝法可制备热塑性生物可降解材料的超细纤维,前期研究已在高效过滤、生物医药领域获得应用,利用该方法实现超细捻线的制备更有望将其应用拓展到高性能可穿戴的织物中。采用热塑性生物降解材料聚乳酸(PLA)为原料,通过自制多射流无针熔体电纺装置制备了纳米捻线,基于加捻原理探究了不同工艺参数对捻线中纤维的取向度和捻线捻度的影响。实验结果表明:在达到击穿电压前,电压越大,泰勒锥个数越多;当收集辊子旋转线速度与气流速度相接近时,纤维的取向性最好;旋风发生器气流速度越大,纤维越聚集成束,纤维捻角越大,最大捻角为36°。

The method of environmentally friendly solvent-free melt electrospinning can prepare superfine fiber of thermoplastic biodegradable material. Previous research had applied to efficient filtering and biomedicine. Using this method to achieve ultrafine twisting was expected to make its application extend to high performance wearable fabric. Thermal plastic biodegradable material poly lactic acid（PLA）as raw materials was prepared nano twisting by a self-made jets without needle melt electrospinning device,based on the principle of twisting to explore the effects of different process parameters on fiber orientation and twisting twist. The experimental Tesults showed that the larger the voltage, the more Taylor cone before reaching breakdown voltage; when the speed of swirl air intake was close to the rotating line speed, the orientation of fiber was exceedingly good;When the gas flow rate of vortex generator was higher,the fibers gathered into a bundle,the fiber twist angle was larger,the maximum twist angle was 36 degrees.