scholarly journals Biological and antibacterial properties of composite coatings on titanium surfaces modified by microarc oxidation and sol-gel processing

2020 ◽  
Author(s):  
Beibei LI ◽  
Tao YANG ◽  
Rongxin SUN ◽  
Pan MA
Keyword(s):  
Composite Coatings ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Microarc Oxidation ◽  
Titanium Surfaces ◽  
Gel Processing

Preparation of HA/chitosan composite coatings on alkali treated titanium surfaces through sol–gel techniques

2007 ◽  
Vol 61 (18) ◽  
pp. 3970-3973 ◽  
Author(s):  
Xiong Lu ◽  
Ying-bo Wang ◽  
Yu-rong Liu ◽  
Jian-xin Wang ◽  
Shu-xin Qu ◽  
...  
Keyword(s):  
Composite Coatings ◽  
Sol Gel ◽  
Titanium Surfaces ◽  
Chitosan Composite

scholarly journals Antibacterial properties of Ag–TiO2 composite sol–gel coatings

RSC Advances ◽  
2015 ◽  
Vol 5 (73) ◽  
pp. 59070-59081 ◽  
Author(s):  
E. Albert ◽  
P. A. Albouy ◽  
A. Ayral ◽  
P. Basa ◽  
G. Csík ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Structural Properties ◽  
Composite Coatings ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Silver Doping

This study reveals the connection between the silver-doping method, the resulting nature and amount of the silver dopant together with the structural properties and the long-term antibacterial activity of composite coatings.

scholarly journals Nano-Ag-loaded hydroxyapatite coatings on titanium surfaces by electrochemical deposition

2010 ◽  
Vol 8 (57) ◽  
pp. 529-539 ◽  
Author(s):  
Xiong Lu ◽  
Bailin Zhang ◽  
Yingbo Wang ◽  
Xianli Zhou ◽  
Jie Weng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Uniform Distribution ◽  
Electrochemical Deposition ◽  
Calcium Ions ◽  
Silver Content ◽  
Composite Coatings ◽  
Antibacterial Properties ◽  
Hydroxyapatite Coatings ◽  
Ag Particles ◽  
Titanium Surfaces

Hydroxyapatite (HA) coatings on titanium (Ti) substrates have attracted much attention owing to the combination of good mechanical properties of Ti and superior biocompatibility of HA. Incorporating silver (Ag) into HA coatings is an effective method to impart the coatings with antibacterial properties. However, the uniform distribution of Ag is still a challenge and Ag particles in the coatings are easy to agglomerate, which in turn affects the applications of the coatings. In this study, we employed pulsed electrochemical deposition to co-deposit HA and Ag simultaneously, which realized the uniform distribution of Ag particles in the coatings. This method was based on the use of a well-designed electrolyte containing Ag ions, calcium ions and l -cysteine, in which cysteine acted as the coordination agent to stabilize Ag ions. The antibacterial and cell culture tests were used to evaluate the antibacterial properties and biocompatibility of HA/Ag composite coatings, respectively. The results indicated the as-prepared coatings had good antibacterial properties and biocompatibility. However, an appropriate silver content should be chosen to balance the biocompatibility and antibacterial properties. Heat treatments promoted the adhesive strength and enhanced the biocompatibility without sacrificing the antibacterial properties of the HA/Ag coatings. In summary, this study provided an alternative method to prepare bioactive surfaces with bactericidal ability for biomedical devices.

Oxide-Diamond Composite Coating Via Sol-Gel Method

1988 ◽  
Vol 121 ◽  
Author(s):  
Azar Nazeri-Eshghi ◽  
J. D. Mackenzie ◽  
J.-M. Yang
Keyword(s):  
Thermal Gradient ◽  
Synthetic Diamond ◽  
Composite Coatings ◽  
Sol Gel ◽  
Soda Lime ◽  
Fused Silica ◽  
Diamond Composite ◽  
Micron Size ◽  
Gel Processing

ABSTRACTUse of micron-size particles of synthetic diamond in oxide matrices prepared by sol-gel processing is explored. Alumina and borosilicate-diamond composite coatings are deposited on soda-lime microscope glass and fused silica substrates using dipping technique and thermophoresis. By varying the thermal gradient between the substrate and the solution, the quality of the films and the concentration of the particles can be controlled.

scholarly journals Synthesis and Characterization of Silver–Strontium (Ag-Sr)-Doped Mesoporous Bioactive Glass Nanoparticles

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 34
Author(s):  
Shaher Bano ◽  
Memoona Akhtar ◽  
Muhammad Yasir ◽  
Muhammad Salman Maqbool ◽  
Akbar Niaz ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Composite Coatings ◽  
Antibacterial Properties ◽  
Bone Diseases ◽  
Osteogenic Potential ◽  
Diffusion Method ◽  
Charge Composition ◽  
In Vitro Bioactivity ◽  
Mesoporous Bioactive Glass

Biomedical implants are the need of this era due to the increase in number of accidents and follow-up surgeries. Different types of bone diseases such as osteoarthritis, osteomalacia, bone cancer, etc., are increasing globally. Mesoporous bioactive glass nanoparticles (MBGNs) are used in biomedical devices due to their osteointegration and bioactive properties. In this study, silver (Ag)- and strontium (Sr)-doped mesoporous bioactive glass nanoparticles (Ag-Sr MBGNs) were prepared by a modified Stöber process. In this method, Ag+ and Sr2+ were co-substituted in pure MBGNs to harvest the antibacterial properties of Ag ions, as well as pro-osteogenic potential of Sr2 ions. The effect of the two-ion concentration on morphology, surface charge, composition, antibacterial ability, and in-vitro bioactivity was studied. Scanning electron microscopy (SEM), X-Ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) confirmed the doping of Sr and Ag in MBGNs. SEM and EDX analysis confirmed the spherical morphology and typical composition of MBGNs, respectively. The Ag-Sr MBGNs showed a strong antibacterial effect against Staphylococcus carnosus and Escherichia coli bacteria determined via turbidity and disc diffusion method. Moreover, the synthesized Ag-Sr MBGNs develop apatite-like crystals upon immersion in simulated body fluid (SBF), which suggested that the addition of Sr improved in vitro bioactivity. The Ag-Sr MBGNs synthesized in this study can be used for the preparation of scaffolds or as a filler material in the composite coatings for bone tissue engineering.

scholarly journals Synthesis, Structural, Morphological and Thermal Characterization of Five Different Silica-Polyethylene Glycol-Chlorogenic Acid Hybrid Materials

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1586
Author(s):  
Michelina Catauro ◽  
Pavel Šiler ◽  
Jiří Másilko ◽  
Roberta Risoluti ◽  
Stefano Vecchio Ciprioti
Keyword(s):  
Polyethylene Glycol ◽  
Chlorogenic Acid ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Silica Matrix ◽  
Sem Images ◽  
Fixed Amount ◽  
Organic Components ◽  
Free Material

The present study investigated the structure, morphology, thermal behavior, and bacterial growth analysis of novel three-component hybrid materials synthesized by the sol-gel method. The inorganic silica matrix was weakly bonded to the network of two organic components: a well-known polymer such as polyethylene glycol (PEG, average molar mass of about 4000 g/mol), and an antioxidant constituted by chlorogenic acid (CGA). In particular, a first series was made by a 50 wt% PEG-based (CGA-free) silica hybrid along with two 50 wt% PEG-based hybrids containing 10 and 20 wt% of CGA (denoted as SP50, SP50C10 and SP50C20, respectively). A second series contained a fixed amount of CGA (20 wt%) in silica-based hybrids: one was the PEG-free material (SC20) and the other two contained 12 and 50 wt% of PEG, respectively (SP12C20 and SP50C20, respectively), being the latter already included in the first series. The X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) images of freshly prepared materials confirmed that all the materials were amorphous and homogeneous regardless of the content of PEG or CGA. The thermogravimetric (TG) analysis revealed a higher water content was adsorbed into the two component hybrids (SP50 and SC20) because of the availability of a larger number of H-bonds to be formed with water with respect to those of silica/PEG/CGA (SPC), where silica matrix was involved in these bonds with both organic components. Conversely, the PEG-rich materials (SP50C10 and SP50C20, both with 50 wt% of the polymer) retained a lower content of water. Decomposition of PEG and CGA occurred in almost the same temperature interval regardless of the content of each organic component. The antibacterial properties of the SiO2/PEG/CGA hybrid materials were studied in pellets using either Escherichia coli and Enterococcus faecalis, respectively. Excellent antibacterial activity was found against both bacteria regardless of the amount of polymer in the hybrids.

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