Polylactic acid matrix composites are widely used in packagings and biomaterials. The specific surface area, flexibility and degradation efficiency of the material are the key factors to determine its application in these fields. In this study, a series of poly(L-lactic acid) (PLLA)/graphene oxide (GO) composite nanofiber webs were prepared using electrospinning technique. The scanning electron microscope (SEM) image of PLLA/GO nanofibers showed a rougher surface and a smaller average diameter compared with that of pure PLLA nanofibers, and the nanofibers with 6 wt% GO in PLLA matrix looked like flatter ribbon. Accordingly, the tensile stress test of the electrospun webs with different GO contents showed high performance, 400% increment in the tensile stress at presence of 6 wt% GO. The hydrolytic degradation behavior of composite the nanofiber webs exhibited that the presence of GOs greatly improved the degradation rate, after 9 days, the degradation ratio of PLLA/GO can reach 16.83%. of the PLLA matrix, resulting from the better hydrophilic property and absorbability. Using GO to improve the preparation of new biocompatible materials from PLLA can provide a reference for problems in the field of packaging materials.

中文翻译：

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扁平带状电纺聚（L-乳酸）/氧化石墨烯纳米纤维网的结构和性能分析

聚乳酸基复合材料广泛用于包装和生物材料。材料的比表面积、柔韧性和降解效率是决定其在这些领域应用的关键因素。在这项研究中，使用静电纺丝技术制备了一系列聚（L-乳酸）（PLLA）/氧化石墨烯（GO）复合纳米纤维网。与纯 PLLA 纳米纤维相比，PLLA/GO 纳米纤维的扫描电子显微镜 (SEM) 图像显示出更粗糙的表面和更小的平均直径，并且在 PLLA 基质中含有 6 wt% GO 的纳米纤维看起来更平坦。因此，具有不同 GO 含量的静电纺丝网的拉伸应力测试显示出高性能，在 6 wt% GO 存在下拉伸应力增加了 400%。复合纳米纤维网的水解降解行为表明，GOs的存在大大提高了降解率，9天后，PLLA/GO的降解率可达16.83%。PLLA 基质具有更好的亲水性和吸收性。利用GO改进PLLA制备新型生物相容性材料可为包装材料领域的问题提供参考。