Biomechanical compatibility and electrochemical stability of HA/Ta2O5 nanocomposite coating produced by electrophoretic deposition on superelastic NiTi alloy

2019 ◽  
Vol 799 ◽  
pp. 193-204 ◽  
Author(s):  
Nazila Horandghadim ◽  
Jafar Khalil-Allafi ◽  
Erkan Kaçar ◽  
Mustafa Urgen
Keyword(s):  
Electrophoretic Deposition ◽  
Niti Alloy ◽  
Nanocomposite Coating ◽  
Electrochemical Stability ◽  
Biomechanical Compatibility

scholarly journals Biofilm inhibition and bactericidal activity of NiTi alloy coated with graphene oxide/silver nanoparticles via electrophoretic deposition

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sirapat Pipattanachat ◽  
Jiaqian Qin ◽  
Dinesh Rokaya ◽  
Panida Thanyasrisung ◽  
Viritpon Srimaneepong
Keyword(s):  
Surface Roughness ◽  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Electrophoretic Deposition ◽  
Biofilm Formation ◽  
Niti Alloy ◽  
Surface Characteristics ◽  
Dependent Manner ◽  
Biofilm Inhibition ◽  
Coating Time

AbstractBiofilm formation on medical devices can induce complications. Graphene oxide/silver nanoparticles (GO/AgNPs) coated nickel-titanium (NiTi) alloy has been successfully produced. Therefore, the aim of this study was to determine the anti-bacterial and anti-biofilm effects of a GO/AgNPs coated NiTi alloy prepared by Electrophoretic deposition (EPD). GO/AgNPs were coated on NiTi alloy using various coating times. The surface characteristics of the coated NiTi alloy substrates were investigated and its anti-biofilm and anti-bacterial effect on Streptococcus mutans biofilm were determined by measuring the biofilm mass and the number of viable cells using a crystal violet assay and colony counting assay, respectively. The results showed that although the surface roughness increased in a coating time-dependent manner, there was no positive correlation between the surface roughness and the total biofilm mass. However, increased GO/AgNPs deposition produced by the increased coating time significantly reduced the number of viable bacteria in the biofilm (p < 0.05). Therefore, the GO/AgNPs on NiTi alloy have an antibacterial effect on the S. mutans biofilm. However, the increased surface roughness does not influence total biofilm mass formation (p = 0.993). Modifying the NiTi alloy surface using GO/AgNPs can be a promising coating to reduce the consequences of biofilm formation.

Electrophoretic deposition and electro-codeposition in nanoparticle-containing molten inorganic salts

2021 ◽  
Author(s):  
weiliang jin ◽  
saijun xiao ◽  
qian kou ◽  
desheng ding ◽  
jun zhang ◽  
...  
Keyword(s):  
Electrophoretic Deposition ◽  
Molten Salts ◽  
Cell Voltage ◽  
Nanocomposite Coating ◽  
Inorganic Salts ◽  
Homogeneous Distribution ◽  
Uniform Dispersion ◽  
A Cell ◽  
Molten Fluorides ◽  
Efficient Heat Transfer

Abstract Molten inorganic salts containing solid nanoparticles with a stable and uniform dispersion have attracted great attention as efficient heat transfer and storage materials1,2 and for catalysis for chemical reactions3-5. Compared with those in aqueous suspensions6,7, electrophoretic deposition and electro-codeposition in molten inorganic salts containing nanoparticles, have not been reported in the literature. Here we report the possibility of electrophoretic deposition of nanoparticles and electro-codeposition of nanoparticles and metal ions in high-temperature molten salts. In molten fluorides and chlorides, a cell voltage of 1.2-1.5 V below the decomposition voltage of the electrolytes, was applied to perform the electrophoretic deposition of nanoparticles (e.g., TiB2 and ZrB2), resulting in compact and adhesive coatings. In molten chlorides containing TiB2 nanoparticles, with the introduction of electroactive specimen MoO3, the electro-codeposition of TiB2 nanoparticles and Mo-containing ions has been achieved to yield a dense and adhesive Mo/TiB2 nanocomposite coating with homogeneous distribution of Mo and TiB2, without the assistance of stirring of molten salts. These findings should present opportunities to synthesize various coatings and films via the proposed processes.

Electrochemical stability, corrosion behavior, and biological properties of Ni–Ti–O nanoporous layers anodically on NiTi alloy

2021 ◽  
Vol 179 ◽  
pp. 109104
Author(s):  
Yonghua Sun ◽  
Youjie Rong ◽  
Ya Zhao ◽  
Yuyu Zhao ◽  
Ruiqiang Hang ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Niti Alloy ◽  
Biological Properties ◽  
Electrochemical Stability

A study of the electrophoretic deposition of polycaprolactone-chitosan-bioglass nanocomposite coating on stainless steel (316L) substrates

2021 ◽  
pp. 088391152110635
Author(s):  
Zahra Sadeghinia ◽  
Rahmatollah Emadi ◽  
Fatemeh Shamoradi
Keyword(s):  
Stainless Steel ◽  
Surface Treatment ◽  
Electrophoretic Deposition ◽  
Deposition Time ◽  
Sol Gel ◽  
Nanocomposite Coating ◽  
Deposition Method ◽  
Stainless Steel 316L ◽  
Gel Method

In this research, bioglass nanoparticles were synthesized via sol-gel method and a polycaprolactone-chitosan-bioglass nanocomposite coating was formed on SS316L substrate using electrophoretic deposition method. Then, the effects of voltage and deposition time on morphology, thickness, roughness, and wettability of final coating were investigated. Finally, biocompatibility and toxicity of the coating were evaluated. The results showed that increase of both time and voltage enhanced the thickness, roughness, and wettability of coating. Also, increase of deposition time increased the agglomeration. Therefore, it can be concluded that voltage of 20 V and time of 10 min are suitable for the formation of a uniform agglomerate-free coating. The presence of bioglass nanoparticles also led to the increase of roughness and improvement of polycaprolactone hydrophobicity. The results also showed higher bioactivity in polycaprolactone-chitosan-1% bioglass nanocomposite coating sample. This sample had a roughness ( Ra) of 1.048 ± 0.037 μm and thickness of 2.54 ± 0.14 μm. In summary, the results indicated that coating of polycaprolactone-chitosan-bioglass nanocomposite on SS316L substrate could be a suitable surface treatment to increase its in vivo bioactivity and biocompatibility.

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