title: A novel silica nanotube reinforced ionic incorporated hydroxyapatite composite coating on polypyrrole coated 316L SS for implant application.
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.
authors.affiliation: Department of Nanoscience and Technology, Bharathiar University, Coimbatore - 641 046, India. Electronic address: kpananth01@gmail.com.
authors.forename: K
authors.initials: K
authors.lastname: Prem Ananth
authors.affiliation: Department of Nano, Medical and Polymer Materials, Yeungnam University, Gyeongsan 712-749, South Korea.
authors.forename: A
authors.initials: A
authors.lastname: Joseph Nathanael
authors.affiliation: Department of Materials Science and Nano engineering, Rice University, Texas 77005, USA; School of Physics, Madurai Kamaraj University, Madurai-625021, India.
authors.forename: Sujin P
authors.initials: SP
authors.lastname: Jose
authors.affiliation: Department of Nano, Medical and Polymer Materials, Yeungnam University, Gyeongsan 712-749, South Korea.
authors.forename: Tae Hwan
authors.initials: TH
authors.lastname: Oh
authors.affiliation: Department of Nanoscience and Technology, Bharathiar University, Coimbatore - 641 046, India.
authors.forename: D
authors.initials: D
authors.lastname: Mangalaraj
mesh_terms: D002448:Cell Adhesion / Q000187:drug effects; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D020099:Coated Materials, Biocompatible / Q000737:chemistry* / Q000633:toxicity; D003343:Corrosion; D017886:Durapatite / Q000737:chemistry* / Q000494:pharmacology; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D008422:Materials Testing; D043942:Nanotubes / Q000737:chemistry* / Q000633:toxicity; D010006:Osteoblasts / Q000187:drug effects; D011108:Polymers / Q000737:chemistry* / Q000633:toxicity; D019736:Prostheses and Implants; D011758:Pyrroles / Q000737:chemistry* / Q000633:toxicity; D012822:Silicon Dioxide / Q000737:chemistry* / Q000633:toxicity
chemical_list: D020099:Coated Materials, Biocompatible; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D012822:Silicon Dioxide; D017886:Durapatite
keywords: 316L SS; Corrosion protection; Hydroxyapatite; Ionic Substitution; Polypyrrole; Silica nanotube