Fabrication of Cobalt-Based Nano-Composite Film for Corrosion Mitigation of Copper in Flow Chloride Medium

Corrosion of metals leads to high maintenance costs, as well as potential threats to structural health and safety. Here, we demonstrate the coating of cobalt tungstate (CoWO4) nanoparticles (NPS)/5-mercapto-1-phenyl-1 H-tetrazole derivative (MPT) used as a nano-composite film on Cu surface for the blocking of micropores to hinder the propagation of metastable pits in an aggressive NaCl medium. The mechanism of interaction between the nanoparticles and tetrazole derivative, in addition to the mode of anchoring to the metal surface and blocking the penetration of chloride ions (Cl−), are all investigated. In this investigation, CoWO4 is synthesized via a wet chemical route and thereafter, is combined with MPT at an optimized ratio thus formulating a nano-composite corrosion inhibitor which in solution gets coated on Cu surface. Atomic force and scanning electron microscopic images of the bare Cu reveal dip pits, which by the coating of the nano-composite are suppressed at the nucleation stage during exposure to the aggressive 3.5% NaCl electrolyte under flow conditions. Electrochemical analysis shows high protection of Cu up to 97% efficiency in the presence of the newly formulated nano-composite inhibitor film.

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Fast and Sensitive Detection of Bisphenol A and 4-n-Octylphenol in Foods Based on a 2D Graphitic Carbon Nitride (g-C3N4)/Gold Nano-Composite Film

Chemistry Africa ◽

10.1007/s42250-021-00227-x ◽

2021 ◽

Author(s):

Miaomiao Zou ◽

Suyan Zou ◽

Chunyan Hu ◽

Xiaoyun Lin ◽

Yongnian Ni

Keyword(s):

Bisphenol A ◽

Composite Film ◽

Carbon Nitride ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Sensitive Detection ◽

Nano Composite

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Improvement of hydrophilic property of rubber dipping former surface with Ni/B/TiO2 nano-composite film

Applied Surface Science ◽

10.1016/j.apsusc.2012.01.002 ◽

2012 ◽

Vol 258 (10) ◽

pp. 4436-4443 ◽

Cited By ~ 18

Author(s):

L. Sikong ◽

M. Masae ◽

K. Kooptarnond ◽

W. Taweepreda ◽

F. Saito

Keyword(s):

Composite Film ◽

Nano Composite ◽

Hydrophilic Property

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Low Temperature Soft Chemical Synthesis of Bright Blue CoAl2O4 Spinel Particles

Journal of Nepal Chemical Society ◽

10.3126/jncs.v25i0.3302 ◽

1970 ◽

Vol 25 ◽

pp. 62-69 ◽

Cited By ~ 2

Author(s):

K. Christine Stella ◽

A. Samson Nesara

Keyword(s):

Low Temperature ◽

Chemical Society ◽

Particle Size Analysis ◽

Size Analysis ◽

X Ray Diffraction ◽

Soft Chemistry ◽

Electron Microscopic ◽

Chemical Route ◽

Soft Chemical Synthesis ◽

Bright Blue

Present work reports the preparation of bright blue CoAl2O4 spinel particles by lowtemperature soft chemical route using urea or glycine as fuel in this paper. Thecharacterization of the resulting powder was done using x-ray diffraction (XRD), particlesize analysis and scanning electron microscopic (SEM) techniques. Pure CoAl2O4 spinelparticles were prepared at relatively low temperature using this soft chemistry route at avery short duration (< 10 minutes) which is also very simple than other techniques such assolid state reaction, ceramic methods and so on. From the particle size analysis, it wasfound that the spinel particles with low diameter (below 35 μm) were formed. The SEMphotographs showed the formation of fluffy morphology with porous structure.Keywords: Cobalt aluminate spinel, low temperature soft chemistry route, XRD, SEM.DOI: 10.3126/jncs.v25i0.3302Journal of Nepal Chemical Society Volume 25, 2010 pp 62-69

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Preparation of chitosan/zinc oxide/Melissa officinalis essential oil nano-composite film and evaluation of physical, mechanical and antimicrobial properties by response surface method

Polymer Testing ◽

10.1016/j.polymertesting.2019.106004 ◽

2019 ◽

Vol 79 ◽

pp. 106004 ◽

Cited By ~ 20

Author(s):

Iraj Karimi Sani ◽

Sajad Pirsa ◽

Şeref Tağı

Keyword(s):

Zinc Oxide ◽

Essential Oil ◽

Composite Film ◽

Response Surface ◽

Response Surface Method ◽

Antimicrobial Properties ◽

Melissa Officinalis ◽

Nano Composite ◽

Surface Method

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THE EFFECTS OF A CARDIAC GLYCOSIDE ON SUBCELLULAR STRUCTURES WITHIN NERVE CELLS AND THEIR PROCESSES IN SYMPATHETIC GANGLIA AND SKELETAL MUSCLE

Canadian Journal of Biochemistry and Physiology ◽

10.1139/o62-033 ◽

1962 ◽

Vol 40 (2) ◽

pp. 303-315 ◽

Cited By ~ 15

Author(s):

R. I. Birks

Keyword(s):

Skeletal Muscle ◽

Structural Changes ◽

Motor Nerve ◽

Electron Microscopic Examination ◽

Sympathetic Ganglia ◽

Chloride Ions ◽

Nerve Cells ◽

Ion Concentration ◽

Electron Microscopic ◽

Pronounced Increase

Nerve cells and their processes in cat sympathetic ganglia and frog skeletal muscle have shown on electron microscopic examination alterations in subcellular morphology as a result of treatment with digoxin. Non-nervous cells were unaffected by the drug. These changes included, in ganglia, swelling of the affected cells, shrinkage of mitochondria with pronounced increase in internal density, swelling of Nissl substance in nerve cell bodies, and loss of structural detail in nerve processes. At the myoneural junction the motor nerve endings were swollen, mitochondria were altered, and the synaptic vesicles were reduced in numbers, those that remained being swollen. These changes were accompanied by invagination of the axon surface by Schwann cell processes.Cell swelling, but not the subcellular changes, was prevented by substitution of sulphate for chloride ions in the extracellular space. When the extracellular sodium ion concentration was reduced to 20 meq/l. the cells were completely protected against digoxin. It is concluded that swelling is caused by net uptake of sodium and chloride as a result of the known inhibitory action of digoxin on sodium extrusion by nerve cells. The possibility that these structural changes in subcellular organelles may be caused by a raised concentration of intracellular sodium ions, such as might occur during activity of excitable cells, is discussed.

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Nano-titanium dioxide/basic magnesium hypochlorite-containing linear low-density polyethylene composite film on food packaging application

Materials Express ◽

10.1166/mex.2020.1704 ◽

2020 ◽

Vol 10 (6) ◽

pp. 771-779

Author(s):

Jing Deng ◽

Qi Jue Chen ◽

Ding Jie Chen ◽

Luo Jie Zheng ◽

Wen Li ◽

...

Keyword(s):

Mechanical Properties ◽

Titanium Dioxide ◽

Composite Film ◽

Food Packaging ◽

Low Density Polyethylene ◽

Low Density ◽

Linear Low Density Polyethylene ◽

Nano Composite ◽

Sensory Score ◽

Nano Titanium Dioxide

The aim of this research was to probe the potential application of nano-titanium dioxide (TiO2)/basic magnesium hypochlorite (BMH)-containing linear low-density polyethylene (LLDPE) composite film in grape fresh-keeping. Mechanical properties, transparency, barrier performance and antibacterial activity of the nano-composite membrane were measured, and results showed that the antibacterial zone diameter of TiO2/BMH on pathogen-Aspergillus niger was 31.4 mm, with mixing ratio of BMH/TiO2 to 2:1. It was clearly shown that the synthesized nano-composite films decreased mechanical properties and transparency of the membrane, and also had a significant impact on sensory score, mass loss rate, decay rate, ascorbic acid (Vc) content and titratable acid content compared with LLDPE films. Moreover, the results revealed that the LLDPE antibacterial film can be effectively used for storing grapes, preserving the flavor of grapes and had an obviously effect in prolonging grapes’ shelf life.

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Influence of Nanocomposite Surface Coating on Biofilm Formation In Situ

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.18117 ◽

2007 ◽

Vol 7 (12) ◽

pp. 4642-4648 ◽

Cited By ~ 35

Author(s):

M. Hannig ◽

L. Kriener ◽

W. Hoth-Hannig ◽

C. Becker-Willinger ◽

H. Schmidt

Keyword(s):

Free Energy ◽

Composite Coating ◽

Surface Free Energy ◽

Biofilm Formation ◽

Tooth Surface ◽

Dense Layer ◽

Electron Microscopic ◽

Nano Composite ◽

Nano Composite Coating

Caries and periodontitis, the most wide-spread oral diseases around the world, are caused by bacterial adherence and biofilm formation onto the natural as well as restored tooth surface. One possible way to prevent the pathogenic consequences of intraoral biofilm formation might be the modification of the tooth surface by application of an anti-adhesive coating that interferes with the bacterial attachment and subsequent bacterial accumulation. The objective of this study was to investigate the effect of an experimental, low surface free energy nano-composite coating material on biofilm formation in situ. For this purpose, an organic/inorganic nano-composite coating (NANOMER®, INM, Saarbrücken, Germany) with a surface free energy of 18–20 mJ/m2 was applied to enamel as well as titanium specimens. The nano-composite coated specimens and un-coated controls were attached to removable intraoral splints and carried by volunteers over 24 h in the oral cavity. After intraoral exposure, specimens were processed for transmission electron microscopic analysis. On non-coated enamel and titanium control samples a multi-layer of adherent bacteria was found. In contrast, on nano-composite coated specimens strongly reduced biofilm formation was observed. In most areas of the surface-coated specimens only a 10–20 nm thick electron dense layer of adsorbed salivary proteins with adherent protein agglomerates of 20–80 nm diameter could be detected. In addition, detachment of the adsorbed biofilm from the nano-composite coated surfaces was evident in electron microscopic micrographs. The present investigation provides ultrastructural evidence that it is possible to cover enamel as well as titanium with a nano-composite coating revealing easy-to-clean surface properties that cause reduced biofilm formation and accelerated removal of adherent biofilms under oral conditions.

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