Abstract The objective of this work was to prepare the mechanically stable hydrophobic biocomposites by incorporating the cellulose fibers into the polymer matrices for their applications in biomedical and food packaging. Herein, two different types of biocomposites were prepared by mixing polylactic acid (PLA) and polyhydroxybutyrate (PHB) with the agro-extracted cellulose, separately at 170 °C. The influence of the cellulose fibers on the thermal, mechanical, and barrier properties of polymer matrices (PLA and PHB) was observed. With an increase in the cellulose content in PLA and PHB, the tensile strength of the biocomposite materials significantly improved with the enhancement of 24.45% and 32.08%, respectively, compared with the pure PLA and PHB. Furthermore, a decrease of 74.16% and 73.49% in the water vapor transmission rate and oxygen transmission rate, respectively, was observed for cellulose/PHB biocomposites. This study highlights that adding cellulose fibers significantly improves the mechanical and the barrier properties of PLA and PHB, suggesting their biocomposites for use in biodegradable polymer industries.

中文翻译：

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机械增强的农业提取纤维素生物复合材料的有效阻隔性能

摘要 这项工作的目的是通过将纤维素纤维掺入聚合物基质中来制备机械稳定的疏水生物复合材料，用于生物医学和食品包装。在此，通过将聚乳酸 (PLA) 和聚羟基丁酸酯 (PHB) 与农业提取的纤维素分别在 170 °C 下混合，制备了两种不同类型的生物复合材料。观察到纤维素纤维对聚合物基质（PLA 和 PHB）的热、机械和阻隔性能的影响。随着PLA和PHB中纤维素含量的增加，与纯PLA和PHB相比，生物复合材料的拉伸强度显着提高，分别提高了24.45%和32.08%。此外，下降了 74.16% 和 73。观察到纤维素/PHB 生物复合材料的水蒸气透过率和氧气透过率分别为 49%。该研究强调，添加纤维素纤维显着改善了 PLA 和 PHB 的机械性能和阻隔性能，表明它们的生物复合材料可用于可生物降解的聚合物行业。