ABSTRACT The effect of sodium carbonate (Na2CO3) treatment of short bamboo fibres on mechanical properties and water absorption character of polyester composite is investigated. Treatment time and Na2CO3 concentration were optimised to 6 h and 5 wt-% respectively. Microscopy of the treated fibres showed a significant change in surface texture whereas; FTIR suggested the removal of amorphous compounds from the fibres that resulted in enhanced interfacial bonding between fibres and the polyester matrix. Removal of amorphous compounds was also confirmed by TGA where material loss for untreated fibres was 15% higher than the treated fibres. Composites were prepared using 10, 20 and 30 wt-% of treated and untreated fibres. Good interfacial bonding, achieved by the fibre treatment, enhanced the strength (∼24 MPa),( decreased the impact energy (from ∼36×10−3 KJ/m2 to ∼33×10−3 KJ/m2) and improved the water absorption resistance (∼2%) in case of 20 wt-% fibres composite.

中文翻译：

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碳酸钠处理纤维以改善短竹天然纤维增强聚酯复合材料的机械和吸水特性

摘要 研究了碳酸钠 (Na2CO3) 处理竹短纤维对聚酯复合材料力学性能和吸水性能的影响。处理时间和 Na2CO3 浓度分别优化为 6 小时和 5 重量％。处理过的纤维的显微镜显示表面纹理发生了显着变化，而; FTIR 建议从纤维中去除无定形化合物，从而增强纤维和聚酯基体之间的界面结合。TGA 也证实了无定形化合物的去除，其中未经处理的纤维的材料损失比处理过的纤维高 15%。使用 10、20 和 30 重量％的处理和未处理纤维制备复合材料。通过纤维处理实现良好的界面结合，提高了强度（~24 MPa），