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Influence of applied coating time on nano hydroxyapatite/ chitosan coating on 316L stainless steel alloy using electrophoretic deposition for biomedical application

Hazber Aya Muhsun, Jassim Ayad Naseef, Gattmah Jabbar Qassim, Kutm Jaber Kasem, Poorsalehi Fatemeh

Advances in Science and Technology. Research Journal

2025

Vol. 19, no. 5

1--13

In this work, an electrophoretic deposition (EPD) method was utilized to cover a biocompatible stainless steel medical grid type 316L with nanoparticles of hydroxyapatite (HA). ln conjunction with the biopolymer chitosan (CHT), as a binder, it enhances the adhesive capabilities of a substrate. The chosen bio-coating method is the EPD process of 316L Stainless Steel alloy due to its ease of use, low cost, and capacity to coat intricate items. Consequently, this research studied different concentrations of the materials utilized, the most significant variables, and their effects in order to acquire the optimal attributes for the coating layer, using voltage applied and deposition time. The coating periods were 2, 4 and 6 minutes, and the concentrations were 4, 7 and 10 g/L, while the voltages were modulated between 20, 40, and 60 volts. In spite of the fact that the metallic medical applications and bone replacement have made substantial and fruitful progress, difficulties still persist. The coating procedures have a significant impact on how well the composite materials work in the biological devices. To improve the properties of composites used in biomedicine, coating them is an essential step. X-ray diffraction (XRD) spectroscopy and scanning electron microscopy (SEM) were used to examine the deposited coatings, and the Zeta potential for suspensions was computed.

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.