Electrophoretic deposition of chitosan in different alcohols

Sorkhi, Leila; Farrokhi-Rad, Morteza; Shahrabi, T.

doi:10.1007/s11998-014-9578-7

Cited by 31 publications

(15 citation statements)

References 18 publications

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“…Fourth, while the neutralization mechanism for chitosan's cathodic electrodeposition appears to be generally accepted, the relative contribution of electrophoresis (movement of charged chitosan chains in response to an applied potential) may not be fully resolved. Possibly, the importance of electrophoresis in chitosan's cathodic deposition may vary among different laboratories because different deposition conditions are often used; different acids to dissolve chitosan (e.g., HCl vs. acetic acid) [73], different solutions (alcohols are sometimes added) [74], and different electrical inputs (controlled currents or voltages).…”

Section: Mechanismmentioning

confidence: 99%

Chitosan to Connect Biology to Electronics: Fabricating the Bio-Device Interface and Communicating Across This Interface

et al. 2014

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Individually, advances in microelectronics and biology transformed the way we live our lives. However, there remain few examples in which biology and electronics have been interfaced to create synergistic capabilities. We believe there are two major challenges to the integration of biological components into microelectronic systems: (i) assembly of the biological components at an electrode address, and (ii) communication between the assembled biological components and the underlying electrode. Chitosan OPEN ACCESSPolymers 2015, 7 2 possesses a unique combination of properties to meet these challenges and serve as an effective bio-device interface material. For assembly, chitosan's pH-responsive film-forming properties allow it to "recognize" electrode-imposed signals and respond by self-assembling as a stable hydrogel film through a cathodic electrodeposition mechanism. A separate anodic electrodeposition mechanism was recently reported and this also allows chitosan hydrogel films to be assembled at an electrode address. Protein-based biofunctionality can be conferred to electrodeposited films through a variety of physical, chemical and biological methods. For communication, we are investigating redox-active catechol-modified chitosan films as an interface to bridge redox-based communication between biology and an electrode. Despite significant progress over the last decade, many questions still remain which warrants even deeper study of chitosan's structure, properties, and functions.

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Section: Mechanismmentioning

confidence: 99%

Chitosan to Connect Biology to Electronics: Fabricating the Bio-Device Interface and Communicating Across This Interface

et al. 2014

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“…It has also been applied as a coating material for surface modification of orthopedic implants because of its similarity to the extracellular matrix of bone and cartilage and unique physicochemical properties, like biocompatibility, non-toxicity, biodegradability, biofunctionality, antibacterial activity, and chemical resistance [1,2,13,[18][19][20][21]. In the acidic medium, chitosan becomes a positively charged polyelectrolyte as a result of the protonation of amino groups [22,23]. It has been reported that adding a small amount of citric acid to the HA-chitosan suspensions improves the mechanical properties of coating, such as Young's modulus and compression strength, and increases the size of HA-chitosan precipitated on the substrate [24].…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic Deposition of Hydroxyapatite–Chitosan–Titania on Stainless Steel 316 L

2019

Self Cite

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In this research, hydroxyapatite (HA)–chitosan–titania nanocomposite coatings were formed on 316 L stainless steel using electrophoretic deposition (EPD) from alcoholic (methanol and ethanol) suspensions containing 0.5 g/L chitosan and 2 and 5 g/L HA and 2 and 5 g/L Titania. The effect of different parameters on the deposition rate, morphology, and corrosion resistance of the coatings in simulated body fluid (SBF) at 37 °C has been studied. The coatings’ properties were investigated using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). Based on the results of this work, it was found that the deposition rate in ethanolic suspensions is lower than methanolic ones. Moreover, the coating surface was smoother when the ethanol was used as a solvent in suspensions in comparison to the ones where methanol was the solvent. The coating deposited from a suspension containing 0.5 g/L chitosan, 2 g/L HA, and 5 g/L titania with ethanol as solvent had the highest corrosion resistance in SBF at 37 °C.

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“…Many works have reported on the effects of various solvents on materials in the EPD process. Farrokhi-Rad and Shahrabi [30], Farrokhi-Rad and Ghorbani [31,32], Mahmoodi et al [33], and Sorkhi et al [34] studied the kinetics of EPD for different alcoholic suspensions of titania nanoparticles with triethanolamine (TEA) as a dispersant. Also, the stability of titania nanoparticles in different alcohols was examined.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the effect of the suspension medium on the EPD of hydroxyapatite nanoparticles and the properties of the obtained coatings were investigated. Furthermore, they studied EPD of titania-carbon nanotube (CNT) nanocomposite coatings in different alcohols [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Water‐Gas Shift Reaction in a Microchannel Ni‐based Catalytic Coated Reactor: Effect of Solvents

Bazdar

Irankhah

2020

Chem Eng & Technol

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Medium-temperature shift (MTS) reaction was investigated in a microchannel reactor using the electrophoretic deposition (EPD) method to coat porous layers of Ni-K/CeO 2 catalyst on stainless-steel plates. The electrolyte suspensions of the catalyst were prepared in isopropanol, ethanol, methanol, and acetone as solvents. All EPD experiments were carried out under similar conditions (i.e., for a contact time of 3 min, at a voltage of 140 V, and in the presence of 0.3 wt % polyethylenimine as the dispersant). The effect of the different solvents on the coated catalytic layers was studied using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and 2D and 3D optical imaging. The experimental results proved that the best performance for the MTS reaction in the plate microreactor was achieved with isopropanol as the solvent.

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Electrophoretic deposition of chitosan in different alcohols

Cited by 31 publications

References 18 publications

Chitosan to Connect Biology to Electronics: Fabricating the Bio-Device Interface and Communicating Across This Interface

Chitosan to Connect Biology to Electronics: Fabricating the Bio-Device Interface and Communicating Across This Interface

Electrophoretic Deposition of Hydroxyapatite–Chitosan–Titania on Stainless Steel 316 L

Water‐Gas Shift Reaction in a Microchannel Ni‐based Catalytic Coated Reactor: Effect of Solvents

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