The objective of the present study is to develop an environment friendly alternative material based on available and local bio-source from the wastes of Algerian date palm trees, date palm twigs fiber (DPF) was selected as an effective reinforcing material for high density polyethylene (HDPE) biocomposite. Two types of treatments have been used including sodium hydroxide (NaOH) treatment to obtain DPF1 followed by potassium permanganate (KMnO₄) treatment to obtain DPF2 for aim to improve fiber-matrix compatibility, HDPE biocomposite reinforced with different ratios of DPF1 and DPF2 varying from 10 to 30 wt% were elaborated, characterized, and compared to select the preferred treatment and percent of DPF which can be used with high properties. The results obtained indicates that the incorporating of 30 wt% of DPF2 in HDPE biocomposite led to an improve in the mechanical and morphological properties. In fact, the improvement in interfacial properties improve ultimate biocomposite performance, and thus qualified its use in different industrial application. The maleic anhydride grafted high-density polyethylene (HDPE-g-MA) was incorporated as a coupling agent to the reinforced biocomposite of 30 wt% DPF2/HDPE with two different loading (7 and 10 wt%), Also, the treatments were seen to enhance the tensile strength and elastic modulus. Additionally, the biocomposites observation by scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed more intimate contact between the fibers and HDEP matrix after surface modification. The results suggested that the successful sample with best characteristics which can be advised is 30 wt% DPF2/HDPE/10 wt% HDPE-g-MA, that offer their use in many applications particularly in the automotive industry.

中文翻译：

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碱表面处理和相容剂对椰枣纤维基高密度聚乙烯生物复合材料拉伸和形态性能的影响

本研究的目的是开发一种基于阿尔及利亚枣椰树废料的可用和当地生物源的环保替代材料，枣椰树树枝纤维（DPF）被选为高密度聚乙烯的有效增强材料。 HDPE) 生物复合材料。已使用两种处理方法，包括氢氧化钠 (NaOH) 处理以获得 DPF1，然后是高锰酸钾 (KMnO ₄) 处理以获得 DPF2 以提高纤维与基体的相容性，对不同比例的 DPF1 和 DPF2 增强的 HDPE 生物复合材料进行了详细阐述、表征和比较，以选择优选的处理方法和 DPF 的百分比，这可以与高属性一起使用。获得的结果表明，在 HDPE 生物复合材料中加入 30 wt% 的 DPF2 可以改善机械和形态性能。事实上，界面性能的改善提高了生物复合材料的最终性能，从而使其在不同的工业应用中得到了应用。马来酸酐接枝高密度聚乙烯 (HDPE-g-MA) 作为偶联剂加入到具有两种不同负载量（7 和 10 wt%）的 30 wt% DPF2/HDPE 的增强生物复合材料中，此外，这些处理可以提高拉伸强度和弹性模量。此外，通过扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 对生物复合材料的观察表明，表面改性后纤维和 HDEP 基质之间的接触更加紧密。结果表明，可以建议的具有最佳特性的成功样品是 30 wt% DPF2/HDPE/10 wt% HDPE-g-MA，它们可用于许多应用，尤其是汽车行业。