Preprint Article Version 1 This version is not peer-reviewed

Fabrication and Characterization of Ag-Sr Doped Hydroxyapatite/chitosan Coatings Deposited on 316L SS via Electrophoretic Deposition

Version 1 : Received: 14 May 2020 / Approved: 15 May 2020 / Online: 15 May 2020 (10:01:20 CEST)

How to cite: Wahaj, M.; Saleem, U.; Iqbal, F.; Yasir, M.; Wadood, A.; Ur Rehamn, M.A. Fabrication and Characterization of Ag-Sr Doped Hydroxyapatite/chitosan Coatings Deposited on 316L SS via Electrophoretic Deposition. Preprints 2020, 2020050252 (doi: 10.20944/preprints202005.0252.v1). Wahaj, M.; Saleem, U.; Iqbal, F.; Yasir, M.; Wadood, A.; Ur Rehamn, M.A. Fabrication and Characterization of Ag-Sr Doped Hydroxyapatite/chitosan Coatings Deposited on 316L SS via Electrophoretic Deposition. Preprints 2020, 2020050252 (doi: 10.20944/preprints202005.0252.v1).

Abstract

In this study, silver-strontium doped hydroxyapatite (AgSr-HA)/chitosan composite coatings were deposited on stainless steel (SS) substrate via electrophoretic deposition (EPD) technique. The EPD parameters such as the concentration of Ag Sr-HA particles in the suspension, applied voltage and deposition time were optimized on by the Taguchi Design of Experiment (DoE) approach. DOE approach elucidated that the “best” coating was obtained at; the deposition voltage of 20V, deposition time of 7 minutes, and at 5 g/L of Ag Sr-HA particles in the suspension. The optimum coatings were characterized by using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy. SEM images confirmed the deposition of chitosan/Ag Sr-HA on the SS substrate. The wettability studies indicated the hydrophilic nature of the chitosan/Ag Sr-HA coatings, which confirmed the suitability of the developed coatings for orthopedic applications. The average surface roughness of the chitosan/Ag Sr-HA coatings was in a suitable range for the attachment of bone marrow stromal cells. Chitosan/Ag Sr-HA coatings showed a potent antibacterial effect against the Gram-Positive and Gram-negative bacteria.

Subject Areas

Electrophoretic deposition; design of experiment; hydroxyapatite; chitosan; antibacterial

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