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首页> 外文期刊>Journal of Polymers and the Environment >Effect of Maleated PLA on the Properties of Rotomolded PLA-Agave Fiber Biocomposites
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Effect of Maleated PLA on the Properties of Rotomolded PLA-Agave Fiber Biocomposites

机译：马来酸化PLA对滚塑PLA龙舌兰纤维生物复合材料性能的影响

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摘要

In this work, agave fibers were surface treated using maleated PLA (MAPLA) in order to increase the fiber content (from 10 up to 40% wt.) in polylactic acid (PLA) biocomposites produced by rotational molding and to study the effect of the agave fiber and its treatment on the physical, mechanical and thermal properties of the biocomposites. This chemical modification between agave fibers and MAPLA was evaluated by FTIR spectroscopy. In general the results indicate that MAPLA surface treatment produces a more homogeneous morphology with lower interfacial gaps and overall porosity, especially at higher agave contents. This improved compatibility promoted better stress transfer leading to increased mechanical properties. For example, the tensile strength and modulus of treated fiber composites increased by up to 68% (from 25 to 41 MPa) and 32% (from 1.30 to 1.74 GPa) respectively, in comparison with untreated fiber composites. Fiber surface treatment also decreases hydrophilicity, lowering water absorption and diffusion coefficient. From thermo-mechanical analyses, the damping behavior of the biocomposites decreased with MAPLA treatment since a stronger interface is able to sustain higher stresses and dissipates less energy. Finally, the thermal stability was also improved as a result of better interfacial chemical bonding leading to a 12 A degrees C increase in thermal stability (from 254 to 266 A degrees C).
机译：在这项工作中，使用马来酸化的PLA（MAPLA）对龙舌兰纤维进行表面处理，以增加通过旋转成型生产的聚乳酸（PLA）生物复合材料中的纤维含量（从10％到40％wt。），并研究其作用。龙舌兰纤维及其对生物复合材料的物理，机械和热性能的处理。龙舌兰纤维和MAPLA之间的这种化学修饰通过FTIR光谱进行了评估。一般而言，结果表明，MAPLA表面处理产生的界面形态更均匀，界面间隙和总孔隙率更低，尤其是在龙舌兰含量更高的情况下。这种改善的相容性促进了更好的应力传递，从而提高了机械性能。例如，与未处理的纤维复合材料相比，处理过的纤维复合材料的拉伸强度和模量分别提高了68％（从25到41 MPa）和32％（从1.30到1.74 GPa）。纤维表面处理还会降低亲水性，降低吸水率和扩散系数。从热力学分析来看，MAPLA处理降低了生物复合材料的阻尼性能，因为更牢固的界面能够承受更高的应力并消耗更少的能量。最后，由于更好的界面化学键合导致热稳定性提高了12 A摄氏度（从254 A升高至266 A摄氏度），因此热稳定性也得到了改善。

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