Alternating current electrophoretic deposition (EPD) of TiO2 nanoparticles in aqueous suspensions

Chávez-Valdez, A.; Herrmann, Martin; Boccaccını, Aldo R.

doi:10.1016/j.jcis.2012.02.054

Cited by 49 publications

(28 citation statements)

References 32 publications

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“…However, the addition of a second chitosan layer seems to control the electrochemical behavior of the coatings, considering that, independently of the ceramic content of the first layer, all coatings have a similar corrosion potential and current density. The chitosan layer decreases significantly the current density from 1065 nA cm 22 (bare metal) to a mean value of 215 nA cm 22 , reducing the kinetics of both anodic and cathodic reactions, and hence imparting higher protective properties to the composite coating. This effect was previously observed for a pure chitosan coating on stainless steel substrate where the current density was considerably decreased as a result of the chitosan coating.…”

Section: Electrochemical Behaviormentioning

confidence: 99%

“…[15][16][17] Numerous techniques are employed to produce TiO 2 coatings on metallic surfaces, such as plasma spray technique, 18,19 micro-arc oxidation (MAO), 4 sol-gel 20 or electrophoretic deposition (EPD). 1,3,21,22 EPD emerges as a versatile, simple and low cost technique to create highly homogeneous coatings with some advantages, like the possibility to deposit materials on 3D structures as well as on porous materials, e.g. scaffolds.…”

Section: Introductionmentioning

confidence: 99%

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Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel

et al. 2013

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Novel chitosan composite coatings containing titania nanoparticles (n-TiO 2 ) for biomedical applications were developed by electrophoretic deposition (EPD) from ethanol-water suspensions. The optimal ethanol-water ratio was studied in order to avoid bubble formation during the EPD process and to ensure homogeneous coatings. Different n-TiO 2 contents (0.5-10 g L 21) were studied for a fixed chitosan concentration (0.5 g L 21) and the properties of the electrophoretic coatings obtained were characterized.Coating composition was analyzed by thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. Scanning electron microscopy (SEM) was employed to study both the surface and the cross section morphology of the coatings, and the thicknesses (2-6 mm) of the obtained coatings were correlated with the initial ceramic content. Contact angle measurements, as a preliminary study to predict hypothetic protein attachment on the coatings, were performed for different samples and the influence of a second chitosan layer on top of the coatings was also tested. Finally, the electrochemical behavior of the coatings, evaluated by polarization curves in DMEM at 37 uC, was studied in order to assess the corrosion resistance provided by the n-TiO 2 /chitosan coatings.

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Section: Electrochemical Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel

et al. 2013

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“…The given scheme reflects the sequential interdependence of electrochemical (9,11) and redox (10) reactions as well as the initial stage of phase transition (12). The justification for such a mechanism has not been thoroughly proven.…”

Section: −mentioning

confidence: 99%

“…To date, in the area of transient electrolysis, much research has been done [4][5][6][7][8][9][10][11][12], many factors which affect these processes have been discovered. All this gives one reason to consider it worthwhile to use an asymmetrical current in electrochemical productions.…”

Section: Introductionmentioning

confidence: 99%

The use of transient electrolysis in the technology of oxide composite nanostructured materials: review

Bespalova¹,

Храменкова²

2016

Nanosystems: Phys. Chem. Math.

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The available experimental material relating to the patterns of formation and properties of functional nanostructured transition metal oxide (Mo, Co, Mn, Ni, Fe, V) composite materials is reviewed. Advanced coatings are considered those whose formation method are simple and do not require high energy costs, expensive equipment and permit the creation of materials with desired physical and chemical properties in a specified manner. In this review, the priority of oxide composite nanostructured materials technology is given to a transient electrolysis method based on the analysis of a data set that demonstrates its advantages. The results are presented for a number of studies aimed at identifying and analyzing the nature and regularities of processes that take place when obtaining oxide composite nanostructured materials using transient electrolysis methods.

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“…and coatings (protective film on metallic substrates for example [12]) can been obtained. For the last application, EPD has been widely used from aqueous or organic suspensions of oxides, as TiO 2 [13,14], ZnO [15] or Bi 2 O 3 [16]. Several approaches have been investigated and reported in the literature about the use of EPD from a sol: in general, these studies deal with the synthesis of particles suspension, by sol-gel method, and their dispersion in a solvent [17,18] or by the dispersion of commercial suspensions directly into the precursor sols [19,20].…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic deposition of hybrid film on aluminium 2024 using sol–gel boehmite nanoparticles

Magalhaes

Ansart

Taberna

et al. 2016

Surface and Coatings Technology

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a b s t r a c tThe realisation of organic/inorganic coatings on metal substrates, prepared by sol-gel route and shaped by electrophoretic deposition (EPD), is a new process which has been the subject of only few studies. In the past few years, EPD became a very interesting deposition technique because it showed some important advantages: i) great control of the deposition rate and ii) good coverage of complex shape parts. Both are the main challenges for all kinds of deposition techniques, used in various fields from anti-corrosion to anti-wear. In this work, the electrophoretic deposition was performed in aqueous sol suspension containing sol-gel boehmite nanoparticles (NPs). The influence of the applied voltage and deposition time on the deposit thickness was studied. The effect of the concentration of NPs, added in the precursor sol, on the thickness was also investigated. The deposition was performed at constant voltage between − 1.2 and − 3.5 V during constant deposition time between 10 and 40 min. It is shown that an increase in the applied voltage and deposition time increased the thickness of the deposit film (from 2 to 11 μm), as well as the amount of evolved hydrogen, resulting in a drop of the formed coatings quality (more porous structure). However, increasing the concentration of NPs in the precursor sol, increased the coating thickness and turned out to be also a key parameter to control the thickness. Finally, it was demonstrated that a perfect control of the microstructure and the deposit thickness was achievable, thanks to both EPD parameters and sol properties.

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Alternating current electrophoretic deposition (EPD) of TiO2 nanoparticles in aqueous suspensions

Cited by 49 publications

References 32 publications

Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel

Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel

The use of transient electrolysis in the technology of oxide composite nanostructured materials: review

Electrophoretic deposition of hybrid film on aluminium 2024 using sol–gel boehmite nanoparticles

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