The surface of Curauá (Ananas Erectifolius) fibers was successfully modified, characterized and applied as reinforcement on polypropylene composites through two different techniques: in situ polymerization and melt mixture. The best results in terms of mechanical performance were obtained for composites prepared through melt mixture technique with fibers submitted to moderate hydrolysis conditions (H₂SO₄ 10 %, 1 h, 40 °C, Ultrasound 30 min) and further acetylation with the incorporation of compatibilizing agent PPMA as well as for the fiber with further silanization without PPMA. Those fibers caused more than 100 % of elastic module improvement with respect to pristine polymer. Glass transition temperature also was increased with the incorporation of A. Erectifolius fibers as well as degradation temperature. Scanning electron microscopy permitted to verify that most of the mechanical properties is lost because of high ratio of empty spaces (mainly in the case of in situ composites).

通过两种不同的技术，成功地对Curauá（Ananas Erectifolius）纤维的表面进行了改性，表征并作为增强材料应用于聚丙烯复合材料：原位聚合和熔融混合物。在机械性能方面，采用熔融混合技术制备的复合材料在纤维处于中等水解条件（H ₂ SO ₄10％，1 h，40°C，超声30分钟），并加入相容剂PPMA进一步乙酰化，以及在没有PPMA的情况下进一步硅烷化的纤维。相对于原始聚合物，这些纤维引起了超过100％的弹性模量改善。玻璃纤维转变温度也随着掺入直立芽孢杆菌纤维以及降解温度而升高。扫描电子显微镜可以验证大多数机械性能由于空位率高而损失（主要是在原位复合材料的情况下）。