This study show influence of alkaline treatment on sisal fiber (SF) in different composites of starch matrices (SM) and cellulose acetate matrices (CAM). SF were modified with an aqueous 0.5M NaOH solution. Composites were prepared in proportion of 3% fiber/matrix (m/m) using casting method. The samples were characterized by Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy by Attenuated Total Reflection (FTIR-ATR), Thermogravimetric Analysis (TGA) and Dynamic-mechanical thermal analysis (DMA). Through results obtained in FTIR and TGA, it was possible to verify that alkaline treatment partially removed hemicellulose and SF lignin. With SEM, best fiber/matrix adhesion in composites prepared with modified fiber (TSF) has been proven to change fibre morphology. Through DMA analysis it was possible to observe that after addition of SF and TSF, SM composites showed improvements in mechanical properties, while TGA showed an increase in initial temperature of thermal degradation in CAM composites with addition of fiber.

这项研究显示了碱性处理对淀粉基质（SM）和醋酸纤维素基质（CAM）不同复合物中的剑麻纤维（SF）的影响。SF用0.5M NaOH水溶液改性。使用浇铸法以3％的纤维/基质（m / m）的比例制备复合材料。通过扫描电子显微镜（SEM），通过衰减全反射的傅立叶变换红外光谱（FTIR-ATR），热重分析（TGA）和动态机械热分析（DMA）对样品进行表征。通过FTIR和TGA获得的结果，可以验证碱性处理部分去除了半纤维素和SF木质素。使用SEM，已证明使用改性纤维（TSF）制备的复合材料中最佳的纤维/基体粘合性可以改变纤维形态。