PLA/sugarcane bagasse fiber composites were prepared by injection molding from two fractions of fibers with different fiber characteristics, which were determined before and after processing. Interfacial adhesion was modified by a maleated PLA coupling agent. The mechanical properties of the composites were characterized by tensile and impact testing, while local deformation processes by acoustic emission testing and microscopy. The results showed that considerable attrition takes place during melt processing in both the length and diameter of the fibers. The originally different batches of short and long fibers have similar dimensions after processing. Interfacial adhesion between PLA and bagasse is inherently good, thus coupling does not improve properties. Shear yielding and fiber fracture consume sufficiently energy to increase the impact resistance. Sugarcane bagasse fibers considerably increase the stiffness of PLA, result in almost constant tensile strength and increase impact resistance yielding a material with reasonable combination of properties for structural applications.

PLA /蔗糖蔗渣纤维复合材料是通过注塑成型由具有不同纤维特性的两部分纤维制备的，这两种纤维是在加工前后确定的。界面附着力通过马来酸化的PLA偶联剂改性。复合材料的机械性能通过拉伸和冲击测试进行表征，而局部变形过程通过声发射测试和显微镜进行表征。结果表明，在熔融加工过程中，纤维的长度和直径均发生相当大的磨损。最初不同批次的短纤维和长纤维在加工后具有相似的尺寸。PLA和蔗渣之间的界面附着力固有良好，因此偶联不会改善性能。剪切屈服和纤维断裂消耗足够的能量以增加抗冲击性。甘蔗渣纤维极大地提高了PLA的刚度，导致几乎恒定的拉伸强度并提高了抗冲击性，从而产生了一种具有合理组合特性的材料，可用于结构应用。