This study aims to investigate the viability of untreated sisal fibers (N.F.), NaOH-treated sisal fibers (NaOH.F.) and cellulose extracted from sisal (CELL.F.) as an alternative to synthetic materials to produce biocomposites. The main objective was to conduct an in-depth study of the properties of these fibers whose aim is to limit matrix/fiber slippage and improve adhesion by modifying reinforcement surfaces, and to improve the efficiency of sisal fibers as reinforcements for composite materials using various analytical techniques including Fourier transform infrared spectroscopy, scanning electron microscopy, x-ray diffraction, and thermogravimetric analysis. In addition, the study aimed to produce a composite material by reinforcing plaster with the aforementioned fibers and then compare the mechanical and physical properties of the resulting material. The results showed that cellulose fibers exhibited higher mechanical strength and better compatibility with the plaster-matrix compared to sisal fibers by an increse of 324% in their tensil strength compared to natural sial fibers. In particular, the flexural strength showed a significant increase of 35% in the cellulose fiber reinforced composite. The reinforced composite material exhibited improved properties such as better flexural strength, increased absorption by 12.8% and descres the density by 21.3%, highlighting the promising prospects of cellulose fibers in advancing biocomposite technology.

中文翻译：

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从剑麻纤维中提取的纤维素的力学和形态分析及其对生物基复合材料力学性能的影响

本研究旨在研究未经处理的剑麻纤维 (NF)、经 NaOH 处理的剑麻纤维 (NaOH.F.) 和从剑麻中提取的纤维素 (CELL.F.) 作为合成材料替代品生产生物复合材料的可行性。主要目标是对这些纤维的性能进行深入研究，其目的是通过改性增强材料表面来限制基体/纤维滑移并提高粘合力，并使用各种分析方法提高剑麻纤维作为复合材料增强材料的效率。技术包括傅里叶变换红外光谱、扫描电子显微镜、X 射线衍射和热重分析。此外，该研究旨在通过用上述纤维增强石膏来生产复合材料，然后比较所得材料的机械和物理性能。结果表明，与剑麻纤维相比，纤维素纤维表现出更高的机械强度和与石膏基质更好的相容性，与天然剑麻纤维相比，其拉伸强度增加了 324%。特别是，纤维素纤维增强复合材料的弯曲强度显着提高了35%。增强复合材料表现出更好的性能，例如更好的弯曲强度、吸收率提高12.8%、密度降低21.3%，凸显了纤维素纤维在推进生物复合材料技术方面的广阔前景。