中文摘要：

采用蒸馏水、NaOH溶液、干法接枝马来酸酐（MAH）、酰化接枝月桂酸（GML）四种方式处理剑麻纤维（SF），用压制成型法制备纤维／聚乳酸（PLA）复合材料。利用红外光谱表征处理后的剑麻纤维。通过力学性能测试和扫描电镜分析表明，复合材料随着纤维含量的增多、层数增加，冲击强度与拉伸强度明显提高。加人70％的同向交错四层纤维时，SF／PLA复合材料的拉伸强度提高到104．5MPa、冲击强度提高到135．86J／m。纤维表面处理可以明显改善复合材料的界面相容性。

英文摘要：

Sisal fiber （SF） was treated by distilled water, NaOH solution, dry grafted maleic anhydride （MAH） and acylation grafted Laurate （GML） respectively. Then the SF/polylactic acid （PLA） composites were produced by press molding. Fourier transform infrared spectroscopy （FTIR） characterization was used to characterize the treated SF. The results show that with the increase in fiber content and layer number, the impact and tensile strength of the composites increase significantly through mechanical testing and scanning electron microscopy （SEM）. Adding 70wt% of two direction staggered four-layered fiber, the tensile strength of the SF/PLA composites increases to 104.5 MPa and the impact strength increases to 135.86 J/m. Fiber surface treatment can obviously improve the interface compatibility of the composites.