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Effect of Nitrate Acid Treated Dolomite on the Tensile Properties of Ultra-High Molecular Weight Polyethylene (UHMWPE) Composites

Abdullah Siti Fatimah Azzahran, Saleh Siti Shuhadah Md, Mohammad Nur Farahiyah, Mahamud Syarifah Nuraqmar Syed, Omar Mohd Firdaus, Akil Hazizan Md, Chang Boon Peng, Saliu Hafsat Ronke, Rostam Nurizatul Husna, Gondro Joanna

Archives of Metallurgy and Materials

2024

Vol. 69, iss. 1

281--288

Ultra-High Molecular Weight Polyethylene (UHMWPE) polymers have been used in biomedical applications due to its biocompatibility, durability, toughness and high wear resistance. To enhance the mechanical properties, various types of minerals are commonly utilized as fillers in UHMWPE. One of the minerals is dolomite, which has been recognized as a valuable mineral with versatile applications, particularly in the field of biomedical applications. This paper presents the tensile properties of UHMWPE composites that filled with dolomite and treated-dolomite at various filler loading (i.e., 1-5 wt.%). Nitric acid and diammonium phosphate were used to treat the dolomite. From the results, the peaks of the FTIR spectrum displays carbonate (CO3-2), phosphate (PO4-3) and hydroxyl (OH-) groups in the ct-dolomite powder sample while the XRD pattern reveals that using dolomite treated with 1M nitric acid resulted in the presence of calcium hydroxide phosphate (Ca10(PO4)5(OH)) and MgO. For tensile strength, UHMWPE/ct-dolomite composites show better tensile strength than the pure UHMWPE composites. Treated improve the dolomite filler and resulted in significantly better matrix-filler interfacial interactions and improve the properties.

A Review of Tensile Properties of Natural Fibres for Geotechnical Applications

Yahya Nur Faezah, Ismail Tuan Noor Hasanah Tuan, Yusop Fatimah Mohamed, Mahani Norul Ahsanah Aulia Mohamad, Malik Alia Farhana, Sofri Liyana Ahmad, Gondro Joanna

Archives of Metallurgy and Materials

2023

Vol. 68, iss. 4

1617--1621

Natural fibres have recently gained attention as an alternative sustainable material for civil engineering applications due to natural fibres’ exceptional performance, including high strength, and their environmental-friendliness and cost-effectiveness. However, there are disadvantages to using natural fibres in extreme environments. Therefore, this paper reviewed the effect of moisture content and temperature on the tensile strength of potential natural fibres for engineering purposes. Furthermore, this paper also critically reviewed the influence of alkaline treatment on natural fibres’ tensile strength. This is significant because alkaline treatment enhances surface friction and the fraction of the revealed cellulose on the fibres’ surface, resulting in better mechanical interlocking. In conclusion, natural fibres demonstrate their potential for geotechnical applications due to the materials’ strong tensile properties after being subjected to treatment processes.