Cholic acid is a versatile coating-forming dispersant for electrophoretic deposition of diamond, graphene, carbon dots and polytetrafluoroethylene

Liu, X.; Zhao, Qinfu; Veldhuis, S.; Zhitomirsky, Igor

doi:10.1016/j.surfcoat.2019.125304

Cited by 9 publications

(7 citation statements)

References 57 publications

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“…BSs were used for the dispersion of carbon nanoclusters, [ 93 ] graphite, [ 94 ] carbon dots, [ 95 ] and diamonds. [ 95,96 ] The adsorption of BSs on diamond, nanodiamond, and carbon dots allowed for the formation of electrostatically stabilized suspensions, which facilitated the fabrication of composites by colloidal methods. [ 95,96 ] The nanodiamond–sodium cholate complex [ 97 ] was used for the fabrication of an advanced fluorescent material for applications in displays.…”

Section: Dispersion and Surface Modification Of Carbon Materialsmentioning

confidence: 99%

“…BSs were used as charging, dispersing, and film‐forming agents for the deposition of micrometer‐size diamond ( Figure ) and nanodiamond particles, CNTs, graphene, carbon dots, hydrotalcite, manganese dioxide, and composites for various applications, such as supercapacitors, coatings for corrosion protection of metals, and sensors. [ 95,96,98–100 ]…”

Section: Fabrication Of Ba and Composite Films By Electrophoretic Depositionmentioning

confidence: 99%

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Multifunctional Properties of Commercial Bile Salts for Advanced Materials Engineering

et al. 2021

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Applications of bile acids (BAs) and bile salts (BSs) in the nanotechnology of functional materials are described. The exceptionally strong solubilization and dispersion power of BAs/BSs is a key factor for the solubilization of dyes, drugs, and polymers for electronic, optical, and biomedical devices, fabrication of composites, based on carbon nanotubes, graphene, diamonds, quantum dots, and polymers for applications in energy storage devices, coatings for corrosion protection of metals, sensors and electronic devices. BAs/BSs have attracted attention for synthesis, design, and surface modification of advanced materials. BAs/BSs are used as reducing, capping, chelating and dispersing agents for the synthesis of nanoparticles of metals and alloys, and low temperature synthesis of stoichiometric nanostructured complex oxides. BAs/BSs exhibit unique selfassembly properties, which are successfully used for the template synthesis of functional nanoparticles of controlled shapes. Particularly important are applications of BAs/BSs in the fabrication of dye sensitized solar cells with enhanced efficiency. Electrochemical strategies are discovered for the deposition of BA films and composites. Of particular interest are the unique gel-forming properties of BAs/BSs, which provide a basis for the synthesis of nanoparticles of controlled size and fabrication of novel materials with advanced functionality.

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Section: Dispersion and Surface Modification Of Carbon Materialsmentioning

confidence: 99%

Section: Fabrication Of Ba and Composite Films By Electrophoretic Depositionmentioning

confidence: 99%

Multifunctional Properties of Commercial Bile Salts for Advanced Materials Engineering

et al. 2021

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“…Jang et al [43] co-deposited PTFE with hydrous ruthenium oxide from a mixture of ethanol and water, while Hamagami et al [44] used acetone solution with a small amount of water for the co-deposition of PTFE particles with titanium oxide. Liu et al [45] used cholic acid sodium salt as a dispersant for the deposition of PTFE particles onto stainless steel substrates. In this case, the use of this dispersant facilitated the fabrication of a stable PTFE suspension.…”

Section: A Electrophoretic Co-deposition Of Peek and Ptfe Particlesmentioning

confidence: 99%

Effect of Low-Friction Composite Polymer Coatings Fabricated by Electrophoretic Deposition and Heat Treatment on the Ti-6Al-4V Titanium Alloy’s Tribological Properties

Fiołek

Zimowski

Kopia

et al. 2020

Metall Mater Trans A

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In this work, polytetrafluoroethylene/polyetheretherketone (PTFE/PEEK 708) coatings were fabricated by electrophoretic deposition (EPD) and heat treatment to improve the tribological properties of the Ti-6Al-4V alloy. A stable suspension containing chitosan polyelectrolyte allowed the co-deposition of both polymer types. The effect of soaking temperature and cooling rate on the coating microstructure was determined. The homogeneous coatings were obtained by heating at 450°C and cooling with a furnace or in water. The crystalline PTFE separate particles and their agglomerates were homogeneously distributed in a PEEK matrix. Interestingly, the PEEK structure was amorphous regardless of the cooling rate after heating. This new phenomenon is associated with the fluorination process. The coatings exhibited moderate scratch resistance but significantly decreased the coefficient of friction (COF) and enhanced the wear resistance of the alloy during the dry friction process in sliding contact with an Al 2 O 3 ball. The COF of the PTFE/PEEK 708 coating equaled 0.10 at room temperature (RT) and was lower than that of the alloy and pure PEEK 708 coating investigated in the same conditions, which reached 0.70 and 0.27, respectively. The wear rate of the coated alloy at RT was lower than that of the uncoated and PEEK 708 coated alloy, around 1900 and 10 times, respectively. Both the COF and wear increased slightly during friction at 150°C. The coating was not effective in improving the alloy's tribological properties during friction at 260°C.

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“…Cholic acid and deoxycholic acid were used (Liu, Zhao, Veldhuis, & Zhitomirsky, 2020; Zhao, Liu, Veldhuis, & Zhitomirsky, 2020) for electrophoretic deposition of electrically neutral polytetrafluoroethylene, which is a promising material for various medical applications (Cassady, Hidzir, & Grondahl, 2014). The deposition approach was based on pH‐dependent charge and gel‐forming properties as well as binding and film‐forming properties of the bile acids.…”

Section: Functionalization Of Implant Materials Using Bile Saltsmentioning

confidence: 99%

“…Electrophoretic deposition mechanism involves electrophoresis of charged molecules or particles towards the electrode surface, where their accumulation, coagulation and charge neutralization results in film formation (Boccaccini, Keim, Ma, Li, & Zhitomirsky, 2010). The coatings showed good corrosion protection of stainless steel (Liu et al, 2020; Zhao et al, 2020). It was suggested that such coatings can be used for corrosion protection of biomedical implants and biomedical devices.…”

Section: Functionalization Of Implant Materials Using Bile Saltsmentioning

confidence: 99%

Application of bile acids for biomedical devices and sensors

2020

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Bile acids (BAs) are physiologically important biosurfactants (Singh, Metrani, Shivanagoudra, Jayaprakasha, & Patil, 2019), which solubilize cholesterol, lipids, proteins, fatty acids, monoglycerides and vitamins in a human body. The strong solubilization power of BAs is related to their amphiphilic chemical structure, which is fundamentally different from the structures of other surfactants. As a general feature, natural BAs molecules have a steroid nucleus with concave hydrophilic and convex hydrophobic sides, containing OH and methyl groups, respectively (Figure 1a and Table 1). The chemical structures of BAs contain a short hydrocarbon chain with COOH or SO 3 H end groups. As a result, dissociated BAs molecules exhibit anionic properties in solutions. Properties of BAs are influenced by the number of OH groups bonded to a steroid core and nature of anionic groups. Modifying the hydroxyl or carboxyl groups of BAs creates a diverse set of BA-based compounds, maintaining some original properties and introducing novel properties as well. The unique distribution of hydrophilic and hydrophobic domains allows these molecules to self-organize into supramolecular assemblies in water. BAs salts form mixed micelles (Figure 1b) with various water-insoluble molecules and facilitate their dissolution. Moreover, BAs allow dispersion of hydrophobic materials, such as carbon nanotubes (Ata, Poon, Syed, Milne, & Zhitomirsky, 2018). The bifacial amphipathic BAs molecules act as compatibilizing agents between the water-insoluble

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Cholic acid is a versatile coating-forming dispersant for electrophoretic deposition of diamond, graphene, carbon dots and polytetrafluoroethylene

Cited by 9 publications

References 57 publications

Multifunctional Properties of Commercial Bile Salts for Advanced Materials Engineering

Multifunctional Properties of Commercial Bile Salts for Advanced Materials Engineering

Effect of Low-Friction Composite Polymer Coatings Fabricated by Electrophoretic Deposition and Heat Treatment on the Ti-6Al-4V Titanium Alloy’s Tribological Properties

Application of bile acids for biomedical devices and sensors

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