A novel silica nanotube reinforced ionic incorporated hydroxyapatite composite coating on polypyrrole coated 316L SS for implant application

K Prem Ananth; A Joseph Nathanael; Sujin P Jose; Tae Hwan Oh; D Mangalaraj

doi:10.1016/j.msec.2015.10.045

A novel silica nanotube reinforced ionic incorporated hydroxyapatite composite coating on polypyrrole coated 316L SS for implant application

Mater Sci Eng C Mater Biol Appl. 2016 Feb:59:1110-1124. doi: 10.1016/j.msec.2015.10.045. Epub 2015 Oct 22.

Authors

K Prem Ananth¹, A Joseph Nathanael², Sujin P Jose³, Tae Hwan Oh², D Mangalaraj⁴

Affiliations

¹ Department of Nanoscience and Technology, Bharathiar University, Coimbatore - 641 046, India. Electronic address: kpananth01@gmail.com.
² Department of Nano, Medical and Polymer Materials, Yeungnam University, Gyeongsan 712-749, South Korea.
³ Department of Materials Science and Nano engineering, Rice University, Texas 77005, USA; School of Physics, Madurai Kamaraj University, Madurai-625021, India.
⁴ Department of Nanoscience and Technology, Bharathiar University, Coimbatore - 641 046, India.

PMID: 26652470
DOI: 10.1016/j.msec.2015.10.045

Abstract

An attempt has been made to deposit a novel smart ion (Sr, Zn, Mg) substituted hydroxyapatite (I-HAp) and silica nanotube (SiNTs) composite coatings on polypyrrole (PPy) coated surgical grade 316L stainless steel (316L SS) to improve its biocompatibility and corrosion resistance. The I-HAp/SiNTS/PPy bilayer coating on 316L SS was prepared by electrophoretic deposition technique. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) studies were carried out. These results confirmed the significant improvement of the corrosion resistance of the 316L SS alloy by the I-HAp/SiNTs/PPy bilayer composite coating. The adhesion strength and hardness test confirmed the anticipated mechanical properties of the composite. A low contact angle value revealed the hydrophilic nature. Inductively coupled plasma-atomic emission spectroscopy (ICP-AES) was used for the leach out analysis of the samples. Added to this, the bioactivity of the composite was analyzed by observing the apatite formation in the SBF solution for 7, 14, 21 and 28days of incubation. An enhancement of in vitro osteoblast attachment and cell viability was observed, which could lead to the optimistic orthopedic and dental applications.

Keywords: 316L SS; Corrosion protection; Hydroxyapatite; Ionic Substitution; Polypyrrole; Silica nanotube.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cell Adhesion / drug effects
Cell Line, Tumor
Cell Survival / drug effects
Coated Materials, Biocompatible / chemistry*
Coated Materials, Biocompatible / toxicity
Corrosion
Durapatite / chemistry*
Durapatite / pharmacology
Humans
Hydrophobic and Hydrophilic Interactions
Materials Testing
Nanotubes / chemistry*
Nanotubes / toxicity
Osteoblasts / drug effects
Polymers / chemistry*
Polymers / toxicity
Prostheses and Implants
Pyrroles / chemistry*
Pyrroles / toxicity
Silicon Dioxide / chemistry*
Silicon Dioxide / toxicity

Substances

Coated Materials, Biocompatible
Polymers
Pyrroles
polypyrrole
Silicon Dioxide
Durapatite