Modification of electrophoretic deposition of chitosan–bioactive glass–hydroxyapatite nanocomposite coatings for orthopedic applications by changing voltage and deposition time

2015 ◽  
Vol 41 (10) ◽  
pp. 14537-14544 ◽  
Author(s):  
A. Molaei ◽  
M. Yari ◽  
M. Reza Afshar
Keyword(s):  
Bioactive Glass ◽  
Electrophoretic Deposition ◽  
Deposition Time ◽  
Nanocomposite Coatings ◽  
Orthopedic Applications

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

2020 ◽  
Author(s):  
Muhammad Wahaj ◽  
Usama Saleem ◽  
Farasat Iqbal ◽  
Muhammad Yasir ◽  
Abdul Wadood ◽  
...  
Keyword(s):  
Electrophoretic Deposition ◽  
Deposition Time ◽  
Composite Coatings ◽  
Gram Negative Bacteria ◽  
Sem Images ◽  
Hydrophilic Nature ◽  
Deposition Voltage ◽  
Orthopedic Applications ◽  
Chitosan Composite

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.

Electrophoretic Deposition of Nanostructured Titania-Bioactive Glass/Alginate Coatings on Stainless Steel

2015 ◽  
Vol 654 ◽  
pp. 159-164 ◽  
Author(s):  
Luis Cordero-Arias ◽  
Sandra Cabanas-Polo ◽  
Sannakaisa Virtanen ◽  
Aldo Roberto Boccaccini
Keyword(s):  
Stainless Steel ◽  
Bioactive Glass ◽  
Electrophoretic Deposition ◽  
Biomedical Applications ◽  
Deposition Time ◽  
Deposition Potential ◽  
Optimal Conditions ◽  
Ceramic Phase ◽  
Steel Substrates ◽  
Nanostructured Titania

An alginate (Alg) based coating containing nanoparticles of titania (nTiO2) and bioactive glass 45S5 (nBG) was deposited on stainless steel substrates by electrophoretic deposition (EPD). The composite nTiO2-nBG/Alg coating developed for potential biomedical applications, was produced from a stable ethanol/water suspension (ζ–potential of-53±13mV) using 7V of deposition potential and 1min of deposition time as optimal conditions. Morphology and composition of the coatings were studied by FTIR, EDX, SEM and XRD, showing that all components were successfully deposited on the final coating. According to TG analysis the coatings presents a 62.4wt% of ceramic phase and 37.6wt% polymer. The coating shows corrosion protection properties compared with the bare uncoated material when analyzed via polarization curves in Dulbecco ́s MEM.

scholarly journals Nanocomposite coating of albumin/Li-containing bioactive glass nanospheres promotes osteogenic activity of PEEK

2021 ◽  
Vol 32 (9) ◽  
Author(s):  
Xubin Qiu ◽  
Ming Zhuang ◽  
Xiaofeng Yuan ◽  
Zhiwei Liu ◽  
Wenjian Wu
Keyword(s):  
Bioactive Glass ◽  
Orthopedic Implants ◽  
Dip Coating ◽  
Nanocomposite Coating ◽  
Nanocomposite Coatings ◽  
Bone Mesenchymal Stem Cells ◽  
Coating Method ◽  
Dip Coating Method ◽  
Xrd Techniques ◽  
Orthopedic Applications

AbstractPolyetheretherketone (PEEK) is an important material applied in orthopedic applications, as it posses favorable properties for orthopedic implants, e.g., radiolucency and suitable elastic modulus. However, PEEK exhibits insufficient osteogenesis and osteointegration that limits its clinical applications. In this study, we aimed to enhance the osteogenisis of PEEK by using a surface coating approach. Nanocomposite coating composed of albumin/lithium containing bioactive glass nanospheres was fabricated on PEEK through dip-coating method. The presence of nanocomposite coating on PEEK was confirmed by SEM, FTIR, and XRD techniques. Nanocomposite coatings significantly enhanced hydrophilicity and roughness of PEEK. The nanocomposite coatings also enhanced adhesion, proliferation, and osteogenic differentiation of bone mesenchymal stem cells due to the presence of bioactive glass nanospheres and the BSA substrate film. The results indicate the great potential of the nanocomposite coating in enhancing osteogenesis and osteointegration of PEEK implants.

Ultra-Low-Power Electrophoretic Deposition of Silica Powder with Nonflammable Organic Solvent

2015 ◽  
Vol 654 ◽  
pp. 88-93
Author(s):  
Hideyuki Negishi
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Electrophoretic Deposition ◽  
Particle Concentration ◽  
Deposition Time ◽  
Ultra Low Power ◽  
Silica Powder ◽  
Inorganic Particles ◽  
Uniform Coating ◽  
Electrical Insulation Properties

Although conventional organic solvents are used in electrophoretic deposition (EPD) owing to several advantages, they are hazardous because of their inflammability or ignition properties. In contrast, hydrofluoro ether (HFE) is nonflammable, polar and possesses excellent electrical insulation properties. In this study, methoxy-nonafluorobutane (MNFB), which is one of HFE was used as the solvent for the EPD of silica powder. Because the density of MNFB is larger than water, sedimentation of inorganic particles is slow. The deposition behavior in MNFB was similar to the EPD in conventional solvents, and was controlled by tuning the applied voltage, deposition time, and particle concentration. A uniform coating was obtained. Notably, the power consumed in this process was significantly lower than that in the EPD using conventional solvents. The current density was of the order of 10 nA/cm2; therefore, the electric power consumption for EPD using MNFB was less than 0.1% of those using conventional solvents. Therefore, MNFB can be used as an effective solvent for EPD because it is nonflammable, allows the application of high voltage, and enables the deposition of particles with low power consumption.

Electrophoretic Deposition of Titania Thin Films: Influence of Deposition Time on Microstructural and Optical Properties of the Coatings

2013 ◽  
Vol 829 ◽  
pp. 917-921
Author(s):  
Saber Ghannadi ◽  
Hossein Abdizadeh ◽  
Mohammad Reza Golobostanfard
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Electrophoretic Deposition ◽  
Deposition Time ◽  
Colloidal Suspension ◽  
Vis Spectroscopy ◽  
Titania Films ◽  
Titania Sol ◽  
Deposited Film ◽  
Deposited Films

Titania thin films were prepared by electrophoretic deposition at various deposition times (1, 5 and 10 min) in constant applied potential (5 V). For this purpose, modified titania sol was prepared as a colloidal suspension. The influence of deposition time on the thickness and optical properties of titania films was investigated. Scanning electron microscope images illustrate compact and homogeneous titania films deposited on FTO substrates. The results show that the film thickness increases with increasing the deposition time. It could be inferred from UV-Vis spectroscopy that increasing the thickness of deposited film causes higher absorbance at UV region. Also, increasing the deposition time from 1 to 5 min leads to increase in optical band gap of the deposited films.

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