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In Vitro Electrochemical Behavior of Sol‐Gel Derived Hydroxyapatite/Graphene Oxide Composite Coatings on 316L SS for Biomedical Applications
Author(s) -
Sebastin Arul Xavier Stango,
Uthirapathy Vijayalakshmi
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202003368
Subject(s) - materials science , bioceramic , graphene , oxide , composite number , corrosion , simulated body fluid , ceramic , layer (electronics) , composite material , crystallite , coating , chemical engineering , metallurgy , scanning electron microscope , nanotechnology , engineering
Abstract Development of bioceramic coatings on the metallic implant surface with superior properties such as good bonding strength, better corrosion resistance and bioactivity was one of the key tasks for the present biomaterial scientists. Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) was one of the hopeful calcium phosphate‐based ceramic biomaterials which can be enforced as a layer on the metallic substrate due to its resemblance with the human bone in chemical composition. Current effort defines the in‐situ blending of HAP/graphene oxide composite by the sol‐gel process. The prepared HAP/GO composites were characterized using FT‐IR, XRD, SEM and TEM analysis. A triple‐layered composite coating was attained at the spin speed of 3000 rpm/min further sintered at 600 °C for 2 hrs. In‐vitro corrosion resistance behavior of the coatings on 316 L SS implant were studied on simulated body fluid. The average crystallite size of the synthesized powders was reduced from 40.58 to 21.08 nm with the addition of graphene oxide, anti‐bacterial study for the HAP/GO composite powder competently inhibits the growth of pathogens. Electrochemical studies and adhesion studies showed increased corrosion resistance with superior bonding strength on 316 L SS surface, which results its use for long term biomedical applications.