Aligned and randomly oriented polylactic acid (PLA) biocomposite nanofiber mats filled with Graphene nanoplatelets (GnP) were prepared by electrospinning. The morphological analysis revealed the successful alignment of the fibers achieved by collecting the mats on a high-speed rotary drum. Furthermore, GnP addition on the polymeric solution leads to an increase of the viscosity with a consequent increment of the fiber diameter. Tensile tests demonstrated that the reinforcing effect of GnP when added to the PLA matrix was more than three times higher in the aligned systems if compared with the respective randomly oriented mats. DSC analysis showed that GnPs were able to slightly increase the crystallinity of the composites acting as nucleating agent. TGA measurements highlighted that the incorporation of GnP in PLA electrospun mats leads to an improved thermal stability of the composites. Both thermal analysis indicate that there is no significant effect of the orientation of the fibers.

通过静电纺丝制备了填充有石墨烯纳米片（GnP）的对齐和随机取向的聚乳酸（PLA）生物复合纳米纤维垫。形态分析表明，通过将垫子收集在高速转鼓上可以成功地对齐纤维。此外，在聚合物溶液中添加GnP会导致粘度增加，从而导致纤维直径增加。拉伸测试表明，与相应的随机取向的垫相比，在对齐系统中添加GnP的增强效果在对齐系统中要高出三倍以上。DSC分析表明，GnPs能够略微提高充当成核剂的复合材料的结晶度。TGA测量结果表明，将GnP掺入PLA电纺丝毡中可以改善复合材料的热稳定性。两种热分析均表明，纤维取向没有明显影响。