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首页> 外文期刊>RSC Advances >Biocomposite consisting of miscanthus fiber and biodegradable binary blend matrix: compatibilization and performance evaluation
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Biocomposite consisting of miscanthus fiber and biodegradable binary blend matrix: compatibilization and performance evaluation

机译：由猕猴桃纤维和可生物降解的二元共混物组成的生物复合材料：相容性和性能评估

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Biocomposites were fabricated from miscanthus fibers and a blend composed of poly(butylene succinate) (PBS)/poly(butylene adipate-co-terephthalate) (PBAT) matrix by extrusion and injection molding. Due to the reinforcing effect of miscanthus fibers, the tensile, flexural, and storage modulus of the composites were increased with increasing fiber content from 30 to 50 wt%. Young's modulus of the composite was evaluated by parallel, series, Hirsch and Halpin–Tsai models. It was found that the Hirsch model has good agreement with the experimental modulus of the composites. There was a sharp reduction in tensile strength and impact strength after the incorporation of miscanthus fibers into PBS/PBAT blend matrix. These reductions were due to the incompatibility between the fibers and the matrix. Therefore, maleic anhydride (MAH) functionalized PBS/PBAT blend was prepared and used as compatibilizer to improve the compatibility between the fibers and the matrix. The composites prepared with 5 wt% MAH functionalized compatibilizer showed significant improvement in mechanical properties compared to their uncompatibilized counterparts. The morphological analysis of the composites displayed good fiber–matrix interaction in the presence of compatibilizer whereas composites showed poor interface between the phases without compatibilizer. The shear thinning behavior of the composites was increased compared to neat PBS/PBAT blend. The increased shear thinning behavior of the composite was attributed to the reduced polymer chain entanglement in the presence of fibers. The miscanthus fibers reinforced PBS/PBAT composites can offer significant benefit in terms of economic competitiveness and functional performances.
机译：由菊苣纤维和由聚丁二酸丁二酯（PBS）/聚己二酸丁二酯-对苯二甲酸对苯二甲酸酯（PBAT）基质（PBAT）组成的共混物，通过挤出和注塑成型制成。由于虎杖纤维的增强作用，随着纤维含量从30 wt％增加到50 wt％，复合材料的拉伸，弯曲和储能模量增加。复合材料的杨氏模量通过平行，串联，Hirsch和Halpin-Tsai模型进行评估。发现Hirsch模型与复合材料的实验模量具有良好的一致性。将桔属纤维掺入PBS / PBAT共混基质后，抗张强度和冲击强度急剧降低。这些减少是由于纤维与基质之间的不相容性。因此，制备了顺丁烯二酸酐（MAH）官能化的PBS / PBAT共混物，并用作增容剂以改善纤维与基质之间的相容性。与不相容的对应物相比，用5 wt％MAH官能化的增容剂制备的复合材料的机械性能显着改善。在存在增容剂的情况下，复合材料的形态分析显示出良好的纤维-基质相互作用，而在没有增容剂的情况下，复合材料的相间界面较差。与纯PBS / PBAT共混物相比，复合材料的剪切稀化行为有所增加。复合材料剪切稀化行为的增加归因于在纤维存在下聚合物链缠结的减少。猕猴桃纤维增强的PBS / PBAT复合材料可以在经济竞争力和功能性能方面提供显着的优势。

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