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首页> 外文期刊>Journal of natural fibers >Effects of Coir Fiber and Maleic Anhydride Modification on the Properties of Thermoplastic Starch/PLA Composite Laminates
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Effects of Coir Fiber and Maleic Anhydride Modification on the Properties of Thermoplastic Starch/PLA Composite Laminates

机译：椰壳纤维和顺丁烯二酸酐改性对热塑性淀粉/ PLA复合层合板性能的影响

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摘要

Coir fiber reinforced composite laminates made of poly(lactic acid) (PLA) with a thermoplastic starch (TPS) were fabricated. Modified thermoplastic starch (MTPS) was prepared by reactive blending of TPS with maleic anhydride (MA). The effect of coir fibers was of our main interest. The tensile properties, water absorption, and morphological properties of the fabricated composite laminates were investigated. The composite laminates between PLA and starch TPS were prepared using coir fiber as reinforcing core, and the physical, mechanical, and morphological properties were studied. The results suggested that the optimum fiber contents for maximum tensile strength for TPS/PLA and MTPS/PLA composites were 20 and 30 wt%, respectively. Using MA for chemical modification of TPS for PLA composites could reduce the PLA content of about 10 wt%, and improve the tensile about 20%. The volume swelling for the MTPS/PLA composites was much lower than that for the TPS/PLA composites, and the swelling reduced with increasing coir fiber content. Based on compressive strength, the pallets produced using MTPS/PLA composites showed a high potential to replace the commercial urea-formaldehyde/PLA composites. It clearly appeared that MA modification to TPS not only improve the mechanical properties of fiber reinforced PLA composites, but also made the PLA composites bio-degrade more quickly.
机译：制备了由聚乳酸（PLA）和热塑性淀粉（TPS）制成的椰壳纤维增强复合层压板。通过将TPS与马来酸酐（MA）反应共混来制备改性热塑性淀粉（MTPS）。椰壳纤维的作用是我们的主要兴趣。研究了制备的复合层压板的拉伸性能，吸水率和形态性能。以椰壳纤维为增强芯，制备了PLA与淀粉TPS复合层压板，研究了其物理，机械和形态学性能。结果表明，TPS / PLA和MTPS / PLA复合材料的最大拉伸强度的最佳纤维含量分别为20和30 wt％。将MA用于PLA复合材料的TPS的化学改性可将PLA含量降低约10 wt％，并将拉伸强度提高约20％。 MTPS / PLA复合材料的体积溶胀比TPS / PLA复合材料的体积溶胀低得多，并且溶胀随着椰壳纤维含量的增加而降低。基于抗压强度，使用MTPS / PLA复合材料生产的托盘显示出替代商用尿素-甲醛/ PLA复合材料的巨大潜力。显然，MA对TPS的改性不仅改善了纤维增强PLA复合材料的机械性能，而且使PLA复合材料的生物降解速度更快。

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