Biomimetic bone-like apatite coating on anodised titanium in simulated body fluid under UV irradiation

Lee, T.C. and Koshy, P. and Abdullah, H.Z. and Idris, M.I. (2017) Biomimetic bone-like apatite coating on anodised titanium in simulated body fluid under UV irradiation. Materials Science Forum, 888. pp. 251-255. ISSN 1662-9752

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Abstract

Low temperature deposition techniques of bioceramics coatings are now being researched and developed to avoid deficiencies inherent in high temperature techniques. Biomimetic coatings are a solution-based method conducted at ambient temperature to deposit bioactive coatings on the surface. The current study aims to investigate the effect of ultraviolet (UV) irradiation on the coating of bone-like apatite on the anodised surface. High purity titanium foils were anodised with an applied voltage of 350 V, current density of 70 mA.cm-2 in mixture of 0.04 M β-glycerophosphate disodium salt pentahydrate (β-GP) and 0.4 M calcium acetate (CA) for 10 min. After anodic oxidation, UV light treatment was conducted in pH-adjusted distilled water for 12 h with ultraviolet light A (UVA) irradiation. Subsequently, the UV-treated anodised titanium foils were soaked in SBF for 7 days with/without UVA irradiation. After SBF immersion for 7 days, anodised titanium with combination of UV light treatment and UV irradiation during in vitro testing was fully covered by highly crystalline bone-like apatite at maximal thickness of 2.8 μm. This occurred mainly due to the formation of large amounts of Ti-OH groups which act as nucleation sites for bone-like apatite. This study also revealed that UV irradiation during in vitro testing is superior in promoting growth of bone-like apatite compared to UV light treatment. The suggested mechanism for bone-like apatite formation on anodised titanium under different UV irradiation conditions is illustrated in this article. The findings of this study indicated that biomimetic bone-like apatite coating with assistance of UV irradiation is an effective method in accelerating the formation of bone-like apatite.

Item Type:	Article
Uncontrolled Keywords:	Biomimetic coating; Anodic oxidation; Simulated body fluid; UV irradiation; Glancing angle X-ray diffraction
Subjects:	T Technology > TP Chemical technology > TP155-156 Chemical engineering
Divisions:	Faculty of Technology Management and Business > Department of Production and Operation Management
Depositing User:	Mrs. Siti Noraida Miskan
Date Deposited:	17 Nov 2021 03:40
Last Modified:	17 Nov 2021 03:40
URI:	http://eprints.uthm.edu.my/id/eprint/3400

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