ABSTRACT

Epoxy-bamboo long natural fibres composites were prepared by hand lay-up method to study the influence of fibre’s treatment on their characteristics. SEM showed increased surface roughness due to the removal of amorphous compounds from the treated fibre as confirmed by the disappearance of certain peaks in FTIR spectroscopy. Resultantly, ∼52% increase in crystallinity was observed by XRD analysis. TGA results also showed the effectiveness of the treatment as mass loss for treated fibres was ∼15% lesser than the untreated fibres. Moreover, thermogravimetric analysis of composites showed highest mass loss in untreated fibres composites and lowest in neat epoxy. The DSC-DTA curves indicated an early start of initiation temperature in treated fibre composite. Tension tests showed ∼12% and ~16% increase in tensile strength and modulus respectively for treated fibres composite due to increased interfacial strength caused by fibre treatment. Treatment also resulted in decreased impact energy and water absorption level.

摘要

采用手糊法制备环氧竹天然长纤维复合材料，研究纤维处理对其特性的影响。SEM 显示，由于从处理过的纤维中去除了无定形化合物，表面粗糙度增加，这由 FTIR 光谱中某些峰的消失所证实。结果，通过 XRD 分析观察到结晶度增加了约 52%。TGA 结果还表明处理的有效性，因为处理过的纤维的质量损失比未处理过的纤维少约 15%。此外，复合材料的热重分析表明，未经处理的纤维复合材料的质量损失最高，纯环氧树脂的质量损失最低。DSC-DTA 曲线表明处理过的纤维复合材料的起始温度提早开始。拉伸试验表明，由于纤维处理引起的界面强度增加，经处理的纤维复合材料的拉伸强度和模量分别增加了约 12% 和约 16%。处理还导致冲击能量和吸水水平降低。