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首页> 外文期刊>Journal of Applied Polymer Science >Preparation, characterization, and biodegradability of renewable resource-based composites from recycled polylactide bioplastic and sisal fibers
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Preparation, characterization, and biodegradability of renewable resource-based composites from recycled polylactide bioplastic and sisal fibers

机译：再生聚乳酸生物塑料和剑麻纤维的可再生资源基复合材料的制备，表征和生物降解性

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摘要

The biodegradability, morphology, and mechanical thermal properties of composite materials composed of polylactide (PLA) and sisal fibers (SFs) were evaluated. Composites containing acrylic acid-grafted PLA (PLA-g-AA/SF) exhibited noticeably superior mechanical properties because of greater compatibility between the two components. The dispersion of SF in the PLA-g-AA matrix was highly homogeneous as a result of ester formation and the consequent creation of branched and crosslinked macromolecules between the carboxyl groups of PLA-g-AA and hydroxyl groups in SF. Furthermore, with a lower melt temperature, the PLA-g-AA/SF composite is more readily processed than PLA/SF. Both composites were buried in soil to assess biodegradability. Both the PLA and the PLA-g-AA/SF composite films were eventually completely degraded, and severe disruption of film structure was observed after 6-10 weeks of incubation. Although the degree of weight loss after burial indicated that both materials were biodegradable even with high levels of SF, the higher water resistance of PLA-g-AA/SF films indicates that they were more biodegradable than those made of PLA.
机译：评价了由聚丙交酯（PLA）和剑麻纤维（SFs）组成的复合材料的生物降解性，形态和机械热性能。包含丙烯酸接枝的PLA（PLA-g-AA / SF）的复合材料表现出明显的优异机械性能，因为这两种组分之间具有更大的相容性。 SF在PLA-g-AA基质中的分散是高度均匀的，这是由于形成了酯以及随后在PLA-g-AA的羧基和SF中的羟基之间产生了支链和交联的大分子。此外，在较低的熔融温度下，PLA-g-AA / SF复合材料比PLA / SF更易于加工。将两种复合材料都埋在土壤中以评估其生物降解性。 PLA和PLA-g-AA / SF复合膜最终都完全降解，孵育6-10周后观察到膜结构严重破坏。尽管埋葬后的失重程度表明两种材料即使在高含量的SF下也可生物降解，但PLA-g-AA / SF膜的较高耐水性表明它们比PLA膜具有更高的生物降解性。

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