In this paper flexible electrospun mats based on poly(lactic acid) (PLA) blended with 25 wt% of poly(hydroxibutyrate) (PHB) and further plasticized with three different concentration of oligomeric lactic acid (OLA) were developed. The morphological, structural, thermal and mechanical performance of electrospun mats was evaluated. OLA improves the crystallization rate of PLA presenting better interaction with PLA than with PHB. The incorporation of OLA to PLA-PHB blends produced a decrease on the viscosity of the polymeric solutions, leading to a reduction of the fibers diameters by increasing the amount of OLA plasticizer in the final blends. The highest amount of OLA of 20 wt% respect to PLA-PHB blend produced some bead defects in the fibers, which leads to a reduction of the mechanical performance of woven no-woven electrospun mats. Furthermore, all the electrospun mats were disintegrated in composting conditions showing their interest as compostable materials. The ternary system PLA-PHB-OLA15, showed the best results in term of structural and mechanical properties as well as appropriate disintegration in compost suggesting their potential applications as agricultural mulch films.

在本文中，开发了一种以聚乳酸（PLA）为基础的柔性电纺垫，该毡与25 wt％的聚羟基丁酸酯（PHB）混合，并进一步用三种不同浓度的低聚乳酸（OLA）进行增塑。评价了电纺垫的形态，结构，热性能和机械性能。OLA提高了PLA的结晶速率，与PLA的相互作用比与PHB的相互作用更好。将OLA掺入PLA-PHB共混物中会降低聚合物溶液的粘度，从而通过增加最终共混物中OLA增塑剂的量来降低纤维直径。相对于PLA-PHB共混物，最高含量的OLA含量为20 wt％，会在纤维中产生一些珠粒缺陷，从而导致编织无纺布电纺垫的机械性能下降。此外，所有的电纺垫都在堆肥条件下分解，显示出它们作为可堆肥材料的兴趣。三元体系PLA-PHB-OLA15在结构和机械性能以及堆肥中适当崩解方面显示出最佳结果，表明其作为农用覆盖膜的潜在应用。