In this paper, the elaboration process of a new composite material based on polyester resin reinforced with long Alfa fibres is described. The used Alfa fibres have been obtained using the chemical method of extraction based on alkali treatment with different percentage of sodium hydroxide (NaOH). The obtained average diameters of fibres treated with 9%, 10%, 11% and 14% NaOH concentrations are about 145 ± 35 µm, 90 ± 15 µm, 83 ± 15 µm and 75 ± 15 µm, respectively. The composite was elaborated with impregnation of the fabric Alfa fibres in polyester resin. Besides, an experimental characterization using tensile tests has been conducted to determine the mechanical properties of the fibres obtained with the different NaOH concentrations. The results show that the composite made of polyester resin reinforced with fibres treated with 9% concentration of NaOH presents the greatest tensile strength.

中文翻译：

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天然阿尔法纤维增强聚酯树脂复合材料的制备和力学性能分析

在本文中，描述了一种基于长阿尔法纤维增强聚酯树脂的新型复合材料的制备过程。使用过的阿尔法纤维是通过化学提取方法获得的，该方法基于用不同百分比的氢氧化钠 (NaOH) 进行碱处理。用 9%、10%、11% 和 14% NaOH 浓度处理的纤维的平均直径分别约为 145 ± 35 µm、90 ± 15 µm、83 ± 15 µm 和 75 ± 15 µm。该复合材料是通过将织物阿尔法纤维浸渍在聚酯树脂中制成的。此外，还进行了使用拉伸试验的实验表征，以确定用不同 NaOH 浓度获得的纤维的机械性能。