甘蔗渣的碱处理对其纤维增强全降解复合材料的影响

利用压制成型的方法制备了甘蔗渣纤维增强全降解复合材料, 探讨了碱处理对材料性能的影响。结果表明, 1 %碱液处理后材料的力学性能得到了提高。碱处理后纤维的分解细化和表面优化改善了纤维/ 基材的粘结性能, 从而使材料力学性能得到提高。而且, 处理后纤维拉伸强度和长径比的增大以及纤维缺陷的降低也会增强材料性能。

Effect of alkal i treated bagasse f ibres on f ibre-reinforced biodegradable composites

The biodegradable composites made from bagasse fibre and biodegraded resin were prepared by press forming, and the effects of alkali treatments on the fibres and composites were investigated. Compared with 3 % and 5% alkali solution, the composites reinforced with 1% alkali solution treated fibre show maximum improvement in mechanical properties. After alkali treatment, the fibrillation occurs and the surface of the fibres gets finer, which contributes to the improvement of fibre-matrix adhesion, and results in enhancing the mechanical properties of composites. Furthermore, the increase of strength and aspect ratio and the reduction of defect concentration in the treated fibres also improve the properties. In comparison with the untreated composites, approximately 13 % improvement in tensile strength, 14% in flexural strength and 30% in impact strength have been found, respectively. SEM observations on the fracture surface of the composites show that the fibre-matrix adhesion is improved after alkali treatments.