Advanced developments of design and structure industries require modern material which both complies with green environment issues to reduce non-renewable resources, and also has the prospect to be fundamental material. The aim of the research was to investigate the interaction between alkali treated of Salacca Zalacca Fiber (SZF) and High Density Polyethylene (HDPE) by using microscopic examination, chemical analysis, contact angle test, interfacial shear strength and flexural tests of composites. SZF was chemically treated using a 5% NaOH solution for 0, 1, 2,3, 4, and 5 h to modify the fiber's properties. Chemical analysis shows that hemicellulose was decomposed after alkalization-ray diffraction found that the crystalline index (CrI) was changed as a result of alkalization. Micrograph observations by scanning electron microscope (SEM) show the complete impurities removal and revealed the parallelly aligned cellulose microfibrils, while atomic force microscopy (AFM) result shows the decrease of surface roughness as seen in 2D roughness and 3D surface topography. Contact angle measurement was found that the contact angle decreases with increased treatment time which indicated the improvement on SZF wettability. From the IFSS test, it was found that the overall fiber-matrix adhesion of the composite was improved with peak adhesion obtained after 5-hour treatment.

设计和建筑行业的先进发展需要现代材料，既要符合绿色环境问题以减少不可再生资源，又有可能成为基础材料。该研究的目的是通过显微镜检查，化学分析，接触角测试，界面剪切强度和挠曲测试，研究Salacca Zalacca纤维（SZF）的碱处理与高密度聚乙烯（HDPE）之间的相互作用。使用5％NaOH溶液对SZF进行了0、1、2、3、4和5小时的化学处理，以改变纤维的性能。化学分析表明，半纤维素在碱化射线衍射后分解，发现结晶指数（CrI）因碱化而改变。扫描电子显微镜（SEM）的显微照片观察显示，杂质已完全清除，并显示出平行排列的纤维素微纤维，而原子力显微镜（AFM）结果显示，表面粗糙度的降低如2D粗糙度和3D表面形貌所示。接触角测量发现，接触角随着处理时间的增加而减小，这表明SZF润湿性的改善。从IFSS测试中，发现复合物的总纤维-基质粘合性随着5小时处理后获得的峰值粘合性而得到改善。接触角测量发现，接触角随着处理时间的增加而减小，这表明SZF润湿性的改善。从IFSS测试中发现，复合物的总纤维-基质粘合力随着5小时处理后获得的峰值粘合力而得到改善。接触角测量发现，接触角随着处理时间的增加而减小，这表明SZF润湿性的改善。从IFSS测试中发现，复合物的总纤维-基质粘合力随着5小时处理后获得的峰值粘合力而得到改善。