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首页> 外文期刊>Biotechnology Progress >New Biocomposites Based on Bioplastic Flax Fibers and Biodegradable Polymers
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New Biocomposites Based on Bioplastic Flax Fibers and Biodegradable Polymers

机译：基于生物塑料亚麻纤维和可降解聚合物的新型生物复合材料

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摘要

A new generation of entirely biodegradable and bioactive composites with polylactic acid (PLA) or poly-ε-caprolactone (PCL) as the matrix and bioplastic flax fibers as reinforcement were analyzed. Bioplastic fibers contain polyhydroxybutyrate and were obtained from transgenic flax. Biochemical analysis of fibers revealed presence of several antioxidative compounds of hydrophilic (phenolics) and hydrophobic [cannabidiol (CBD), lutein] nature, indicating their high antioxidant potential. The presence of CBD and lutein in flax fibers is reported for the first time. FTIR analysis showed intermolecular hydrogen bonds between the constituents in composite PLA+flax fibers which were not detected in PCL-based composite. Mechanical analysis of prepared composites revealed improved stiffness and a decrease in tensile strength. The viability of human dermal fibroblasts on the surface of composites made of PLA and transgenic flax fibers was the same as for cells cultured without composites and only slightly lower (to 9%) for PCL-based composites. The amount of platelets and Escherichia coli cells aggregated on the surface of the PLA based composites was significantly lower than for pure polymer. Thus, composites made of PLA and transgenic flax fibers seem to have bacteriostatic, platelet anti-aggregated, and non-cytotoxic effect.
机译：分析了以聚乳酸（PLA）或聚ε-己内酯（PCL）为基质并以生物塑料亚麻纤维为增强材料的新一代完全可生物降解的生物活性复合材料。生物塑料纤维包含多羟基丁酸酯，并从转基因亚麻获得。纤维的生化分析表明，存在几种亲水性（酚醛）和疏水性[大麻二酚（CBD），叶黄素]性质的抗氧化化合物，表明它们具有很高的抗氧化潜力。首次报道了亚麻纤维中CBD和叶黄素的存在。 FTIR分析表明，复合PLA +亚麻纤维中各成分之间的分子间氢键在基于PCL的复合物中未检测到。制备的复合材料的力学分析表明，刚度得到改善，拉伸强度降低。在由PLA和转基因亚麻纤维制成的复合材料表面上，人类真皮成纤维细胞的活力与无复合材料培养的细胞相同，而基于PCL的复合材料仅稍低（至9％）。在基于PLA的复合材料表面聚集的血小板和大肠杆菌细胞数量明显低于纯聚合物。因此，由PLA和转基因亚麻纤维制成的复合材料似乎具有抑菌，抗血小板聚集和无细胞毒性的作用。

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