Surface Properties of NiTi Alloy by Electro-Polishing in Sulfuric Acid-Ethylene Glycol Solution

2021 ◽  
Author(s):  
Daihua He ◽  
Qian Kangle ◽  
Miao ZHANG ◽  
Ping LIU ◽  
Xinkuan LIU
Keyword(s):  
Sulfuric Acid ◽  
Ethylene Glycol ◽  
Surface Properties ◽  
Niti Alloy ◽  
Glycol Solution

Effects of Anodic Oxidation in Ethylene Glycol Based Electrolyte on the Corrosion Resistance and Biocompatibility of NiTi Shape Memory Alloy

2013 ◽  
Vol 829 ◽  
pp. 431-435 ◽  
Author(s):  
Maryam Pourmahdavi ◽  
Nader Parvin
Keyword(s):  
Corrosion Resistance ◽  
Shape Memory Alloy ◽  
Ethylene Glycol ◽  
Shape Memory ◽  
Niti Alloy ◽  
Medical Application ◽  
Electrochemical Anodization ◽  
Niti Shape Memory Alloy ◽  
Nanoporous Surface ◽  
Glycol Solution

Nickel titanium (NiTi) is the most attractive shape memory alloy in industrial and in medical application but suffer from corrosion attack by body fluids. Nowadays, Electrochemical anodization has become a popular surface modification method for biomaterials. In this study we prepared TiO2 coating with nanoporous surface morphology on NiTi shape memory alloy by using electrochemical anodization in ethylene glycol based electrolyte followed by annealing in 600 °C and explored its appropriateness for biomedical applications. Morphology and crystal structure of the film was characterized by Field emission scanning electron microscopiy (FE-SEM) and X-ray diffraction (XRD) tests. The corrosion resistance of the treated NiTi alloy was investigated by potentiodynamic polarization test and The findings showed that the anodization in ethylene glycol solution extremely increased the corrosion resistance and hence biocompatibility.

Electrochemical micromachining of ZrCu-based amorphous alloy in ethylene glycol solution

2021 ◽  
Vol 132 ◽  
pp. 107155
Author(s):  
Hang Yusen ◽  
Yang Tao ◽  
Xu Zhengyang ◽  
Zeng Yongbin
Keyword(s):  
Amorphous Alloy ◽  
Ethylene Glycol ◽  
Electrochemical Micromachining ◽  
Glycol Solution

Establishing Chemical Bond Layer of Poly(Ethylene Glycol) on NiTi Alloy Surface

2013 ◽  
Vol 785-786 ◽  
pp. 578-581
Author(s):  
Hong Yan Yu ◽  
Lian Cai Wang ◽  
Yan Li ◽  
Xin Miao Zeng ◽  
Xin Qing Zhao
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Niti Alloy ◽  
Covalent Bond ◽  
Niti Shape Memory Alloy ◽  
Poly Ethylene Glycol ◽  
Γ Irradiation ◽  
Piranha Solution ◽  
Bond Layer ◽  
Poly Ethylene

To get bioorganic surface with improving biological properties, NiTi shape memory alloy was bonded poly (ethylene glycol) (PEG) by sequentially piranha solution treating, silanizing, and then γ-ray irradiation induced grafting. Piranha solution treating gave hydroxylated surfaces for the benefit of next silanization. The trichlorovinylsilane (TCVS) was performed as a bridge to covalent bond treated NiTi substrates and PEG by γ-irradiation. X-ray photoelectron spectroscopy (XPS) was used to indicate that PEG was bonded on silanized NiTi surface by irradiation. Osteoblast culture of 1 day and methyl-thiazol-tetrazolium (MTT) assay showed that PEG bonded on NiTi surface enhanced cell proliferation and cell amount increased significantly with increasing the concentration of bonded PEG.

Recovery of β-galactosidase from a poly (ethylene glycol) solution by diafiltration

1989 ◽  
Vol 11 (11) ◽  
pp. 744-751 ◽  
Author(s):  
Andres Veide ◽  
Torgny Lindbäck ◽  
Sven-Olof Enfors
Keyword(s):  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Glycol Solution

scholarly journals ELECTROCHEMICAL REDUCTION OF SELENIUM IONS FROM ORGANIC SOLUTION

2020 ◽  
pp. 43-48
Author(s):  
S.P. Javadova ◽  
Keyword(s):  
Ethylene Glycol ◽  
Electrochemical Reduction ◽  
Effective Activation Energy ◽  
Electrochemical Kinetics ◽  
Organic Solution ◽  
Pt Electrodes ◽  
Type Semiconductor ◽  
Calculation Results ◽  
Metal Dichalcogenides ◽  
Glycol Solution

Due to the unique properties of metal dichalcogenides, they are wide used in various fields of nano- and optoelectronics. Bi2Se3 is one of the promising n-type semiconductor materials belonging to the Av – Bvı group, with a band gap of 0.3 eV. To obtain these compounds by co-electrodeposition, we study the electroreduction of the initial components separately. Therefore, the study is devoted to the electrochemical reduction of selenite ions from the ethylene glycol solution. By drawing cyclic and linear polarization curves on Pt electrodes, the kinetics, the mechanism of the process, and the influence of various factors on the electroreduction of selenite ions are studied. Using the obtained data on the influence of temperature, the effective activation energy was calculated by the Gorbachov method. The calculation results show that the electroreduction of selenite ions from ethylene glycol is accompanied by electrochemical kinetics closer to diffusion

scholarly journals Fabrication and extraction of silicon-containing products from rice husks

2020 ◽  
Vol 61 (1) ◽  
pp. 133-139
Author(s):  
Alexander E. Panasenko ◽  
◽  
Lyudmila A. Zemnukhova ◽  
Nicolay P. Shapkin ◽  
◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Raw Materials ◽  
Rice Husks ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Plant Materials ◽  
Vanadyl Acetylacetonate ◽  
Amorphous Silicon Dioxide ◽  
Glycol Solution ◽  
Heterofunctional Polycondensation

To isolate silicon-containing products from plant materials, the reaction of interaction of rice husks with triethanolamine and ethylene glycol have been investigated. The effect of pretreatment of raw materials and the reaction conditions on the yield of soluble products containing silicon has been studied. It has been shown that the highest enrichment of rice husks with silicon occurs upon its treatment with concentrated hydrochloric acid and the Schweitzer's reagent. The highest degree of silicon extraction (69%) was achieved at using native rice husks and vanadyl acetylacetonate as a catalyst. The resulting solution contained silicon in the form of silatrane fragments. In order to isolate a silicon-containing product from the ethylene glycol solution, which would have the prospect of practical use and the maximum silicon yield, the heterofunctional polycondensation method was applied. It has appeared to be possible to isolate solid products using acetylacetonates of trivalent and tetravalent metals, which formed metal siloxanes. The structure of the obtained compounds has been confirmed by the element and X-ray diffraction analysis, as well as by the IR spectroscopy. When using rice husk chaffs as a silicon source, the product of the reaction with ethylene glycol and triethanolamine has appeared to be an irregular copolymer comprising amorphous silicon dioxide fragments and cyclic fragments similar in structure to that of silatranes. The application of metal acetylacetonates has made it possible to isolate silicon derivatives in the form of organometallic siloxanes. Тhe yield of metalsiloxanes increased in the sequence Zr < Fe < Al. Apparently, this was due to formation of lattice structures in the case of trivalent aluminum and iron, while zirconium had two remaining acetylacetonate groups and, in this case, its functionality was lower than for trivalent metals, which was confirmed by the spectral data.

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