scholarly journals Coating of Titanium Substrates with ZrO2 and ZrO2-SiO2 Composites by Sol-Gel Synthesis for Biomedical Applications: Structural Characterization, Mechanical and Corrosive Behavior

Coatings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 200 ◽  
Author(s):  
Michelina Catauro ◽  
Federico Barrino ◽  
Massimiliano Bononi ◽  
Elena Colombini ◽  
Roberto Giovanardi ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Sol Gel ◽  
Living Organism ◽  
Titanium Implants ◽  
Metallic Materials ◽  
Zro2 Content ◽  
Implant Surface ◽  
Sol Gel Synthesis ◽  
Titanium Substrates ◽  
Harmful Effects

The use of metallic materials as implants presents some major drawbacks, such as their harmful effects on the living organism, especially those induced by corrosion. To overcome this problem, the implant surface of titanium implants can be improved using a coating of bioactive and biocompatible materials. The aim of this work is the synthesis of SiO2/ZrO2 composites with different percentages of zirconia matrix (20, 33 and 50 wt.%), by the sol-gel method to coat commercial Grade 4 titanium disks using a dip coater. Attenuated total reflectance Fourier transform infrared (ATR/FTIR) spectroscopy was used to evaluate the interactions between the inorganic matrices. Furthermore, the mechanical properties and corrosive behavior of the SiO2/ZrO2 coatings were evaluated as a function of the ZrO2 content. The bioactive properties of the substrate coated with different composites were evaluated using simulated body fluid (SBF). The antibacterial activity was tested against gram-negative and gram-positive Escherichia coli and Enterococcus faecalis, respectively, to assess the release of toxic products from the different composites and to evaluate the possibility of using them in the biomedical field.

Sol–gel synthesis of Ag-doped titania-coated carbon nanotubes and study their biomedical applications

2019 ◽  
Vol 74 (1) ◽  
pp. 197-208 ◽  
Author(s):  
Duha S. Ahmed ◽  
Mustafa K. A. Mohammed ◽  
Mohammad R. Mohammad
Keyword(s):  
Carbon Nanotubes ◽  
Biomedical Applications ◽  
Sol Gel ◽  
Doped Titania ◽  
Sol Gel Synthesis ◽  
Coated Carbon

Morphological Analysis of Hydroxyapatite Particels Obtained by Different Methods

2010 ◽  
Vol 638-642 ◽  
pp. 681-686 ◽  
Author(s):  
Eric M. Rivera-Muñoz ◽  
Rodrigo Velázquez-Castillo ◽  
J.L. Cabrera-Torres
Keyword(s):  
Biomedical Applications ◽  
Morphological Analysis ◽  
Sol Gel ◽  
Living Organism ◽  
Particle Growth ◽  
Silica Gels ◽  
Synthesis Methods ◽  
Biomedical Sciences ◽  
Chemical Additives ◽  
Gel Technique

Material science is playing an increasing role in bioengineering and biomedical sciences, aiming to develop new systems and materials capable of overcoming the highly demanding environment of a living organism. One of those materials, Hydroxyapatite (HAp), is the principal calcium phosphate present in the mineral phase of bone. Hydroxyapatite-based materials have been used for dental and biomedical applications, and the control of morphology and structure at micro and nanoscale levels in the synthesis processes, is crucial for several of those applications. Hydroxyapatite crystalline particles were obtained by the so-called sol-gel technique, in which silica gels induce the formation of apatite particles in a simulated body fluid at nearly 37°C, different chemical additives were used to control morphology and particle size, as previously reported by our group. Recently, the synthesis of HAp particles with similar morphologies obtained by different methods, have been reported by other groups. Differences and similarities in morphologies, as well as in the synthesis processes, are established in the present work, along with a discussion of possible crystal growth and assembly mechanisms, which lead to a better understanding of the particle growth processes, is included. This knowledge could be the basis for further synthesis methods aimed to obtain HAp nanostructures with a crystal preferential orientation.

TiO2/PCL Hybrid Layers Prepared via Sol-Gel Dip Coating for the Surface Modification of Titanium Implants: Characterization and Bioactivity Evaluation

2015 ◽  
Vol 760 ◽  
pp. 353-358 ◽  
Author(s):  
Michelina Catauro ◽  
Flavia Bollino ◽  
Ferdinando Papale ◽  
Giuseppe Lamanna
Keyword(s):  
Sol Gel ◽  
Pure Titanium ◽  
Dip Coating ◽  
Biological Properties ◽  
Titanium Implants ◽  
Human Blood Plasma ◽  
Commercially Pure Titanium ◽  
Implant Surface ◽  
Titanium Grade ◽  
Dip Coating Technique

When bioactive coatings are applied to medical implants by means of sol-gel dip coating technique, the biological proprieties of the implant surface can be modified to match the properties of the surrounding tissues. In this study, sol-gel method is used to synthesized organic-inorganic nanocomposites materials consisting of an inorganic titania matrix in which 10 wt% of a biodegradable polymer, the poly-ε-caprolactone (PCL), was incorporated. The synthesized materials, in sol phase, were used to dip-coat a commercially pure titanium grade 4 substrate in order to improve its surface biological properties. Materials were characterized using Fourier transform infrared spectroscopy (FT-IR) and a morphological analysis of the obtained films was performed via scanning electron microscopy (SEM). Coating bioactivity was investigated by soaking coated substrates in a fluid simulating the human blood plasma (SBF) and successively evaluating the formation of a hydroxyapatite layer on their surface by means of SEM/EDX (energy dispersive X-ray).

scholarly journals Sol–gel synthesis and structural characterisation of P2O5–B2O3–Na2O glasses for biomedical applications

2009 ◽  
Vol 19 (1) ◽  
pp. 150-158 ◽  
Author(s):  
Daniela Carta ◽  
Jonathan C. Knowles ◽  
Paul Guerry ◽  
Mark E. Smith ◽  
Robert J. Newport
Keyword(s):  
Biomedical Applications ◽  
Sol Gel ◽  
Structural Characterisation ◽  
Sol Gel Synthesis

Hybrid Nanomaterial Scaffolds for Specific Biomedical Applications

2009 ◽  
Vol 1237 ◽  
Author(s):  
Mandar Gadre ◽  
Jianing Yang ◽  
Frederic Zenhausern
Keyword(s):  
Cell Culture ◽  
Biomedical Applications ◽  
Sol Gel ◽  
Three Dimensional ◽  
Sample Collection ◽  
Hybrid Nanomaterial ◽  
Organic Hybrid ◽  
Hybrid Aerogels ◽  
Sol Gel Synthesis ◽  
Gel Processing

AbstractHighly porous nanomaterials like aerogels, hybrid crosslinked aerogels (X-aerogels) and xerogels exhibit a broad range of tailorable properties such as the pore size, surface area, surface chemistry and mechanical strength. The versatile manufacturing route of sol-gel synthesis and various tunable properties makes aerogels and xerogels attractive candidates for biomedical applications including tissue engineering, sample collection applicators and engineered microenvironments for three-dimensional cell culture. The present study explores meso- and macroporous inorganic-organic hybrid aerogels prepared via sol-gel processing for two different applications, namely, as scaffolds for cell culture and as potential materials for sample collection applicators.

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