Morphology, Structure and Particle Size of Hybrid Nanozinc Oxide

2017 ◽  
Vol 728 ◽  
pp. 204-208
Author(s):  
Tanapak Metanawin ◽  
Praripatsaya Panutumrong ◽  
Siripan Metanawin
Keyword(s):  
Particle Size ◽  
Zinc Oxide ◽  
Miniemulsion Polymerization ◽  
Polymer Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nano Zinc Oxide ◽  
Oxide Particles ◽  
Zinc Oxide Particles ◽  
Nano Zinc

The hybrid polymer materials of nano-zinc oxide were synthesized via miniemulsion polymerization technique. Zinc oxide nanoparticles were encapsulated by polystyrene to introduce multi-function to the hybrid nano-zinc oxide. The contents of zinc oxide particles in the hybrid nano-zinc oxide were various from 1wt% to 40wt%. The particles sizes of hybrid nano-zinc oxide were determined by using dynamic light scattering. It was showed that the particle size of the hybrid nano-zinc oxide was in the range of 124-205nm. Scanning electron microscopy was employed to determine the topography and morphology of hybrid nano-zinc oxide. The crystal structure of hybrid nano-zinc oxide were explored by X-ray diffraction spectroscopy.

scholarly journals Application of Electrochemical Techniques on Study of Effect of Nano-ZnO in Conductive Polyaniline Containing Zinc-Rich Primer

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Ximing Li ◽  
Homero Castaneda
Keyword(s):  
Zinc Oxide ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Nano Zinc Oxide ◽  
Conductive Polyaniline ◽  
Oxide Particles ◽  
Zinc Oxide Particles ◽  
Nano Zinc ◽  
Electrode Technique ◽  
Protection Period

Effect of zinc oxide nanoparticles on anticorrosion performance has been studied in conductive polyaniline containing zinc-rich primer in 3.5 wt% NaCl solution, using Electrochemical Impedance Spectroscopy (EIS) and localized electrochemical Scanning Vibrating Electrode Technique (SVET). The results showed that the addition of nano-zinc oxide particles in conductive polyaniline containing zinc-rich primer made the reaction of zinc more stable and slower, further increasing the effective cathodic protection period. EIS and SVET results confirmed that three performance evolution stages were obtained for zinc-rich primer being immersed in 3.5 wt% sodium chloride solution.

Synthesis of nano-zinc oxide with different morphologies and its application on fabrics for UV protection and microbe-resistant defense clothing

2020 ◽  
Vol 90 (21-22) ◽  
pp. 2492-2503
Author(s):  
MA Mousa ◽  
M Khairy
Keyword(s):  
Electron Microscopy ◽  
Escherichia Coli ◽  
Scanning Electron Microscopy ◽  
Staphylococcus Aureus ◽  
Zinc Oxide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nano Zinc Oxide ◽  
Nano Zinc ◽  
Scanning Electron

A liquid precipitation method was used to prepare zinc oxide nanoparticles in three diverse media: water, methanol, and ethylene glycol. The studied materials were examined by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and ultraviolet-visible spectroscopy. X-ray diffraction patterns showed a hexagonal Wurtzite structure of zinc oxide with a nanocrystalline size. Acquired powders showed different morphologies (rod, star, and spherical structures), which were affected by the nature of the solvent in the reaction. The different zinc oxide powders have varied optical band gaps. Scanning electron microscopy examinations confirmed the arrangement of nano-zinc oxide on the surfaces of the materials. The zinc oxide-covering procedure was carried out on cotton, polyester, and 50/50 wt% polyester/cotton blended fabrics using a simple dip and curing system. The cotton fabric treated with nanorod zinc oxide exhibited the highest ultraviolet protection factor with a value of 247.2. The antimicrobial properties of untreated and treated fabrics with nano-zinc oxide were measured against Gram-negative bacteria (Escherichia coli), Gram-positive bacteria (Staphylococcus aureus), and diploid fungus (Candida albicans). The results showed the antimicrobial action relies on the morphological structure and the particle size of zinc oxide and that it increases with a reduced particle size. The cotton fabric treated with 26 nm nonspherical zinc oxide particles showed the highest antimicrobial efficiency with values of 91.4%, 86.8%, and 84.7% for Staphylococcus aureus, Escherichia coli, and Candida albicans, respectively. The mechanical properties of treated fabrics were studied. The results confirm that nano-zinc oxide is highly useful for improving the performance of defense textile products because of its biocompatibility, environmental friendliness, and nontoxicity.

scholarly journals The Effect of Nano Zinc Oxide Particles on Color Stability of MDX4-4210 Silicone Prostheses

2020 ◽  
Vol 14 (04) ◽  
pp. 525-532
Author(s):  
Dittaya Charoenkijkajorn ◽  
Sasiwimol Sanohkan
Keyword(s):  
Zinc Oxide ◽  
Artificial Aging ◽  
Color Change ◽  
Color Stability ◽  
Silicone Elastomer ◽  
Aging Period ◽  
Nano Zinc Oxide ◽  
Oxide Particles ◽  
Zinc Oxide Particles ◽  
Nano Zinc

Abstract Objective This article aimed to study the effect of different concentrations of nano zinc oxide particles on the color change of MDX4–4210 facial silicone elastomer after artificial aging. Materials and Methods Silicone specimens (N = 150) were fabricated by incorporating intrinsic pigments and divided into three groups—white, yellow, and red, each group consisting of 50 specimens (n = 50). In each color, specimens were subdivided into five subgroups according to the quantity of zinc oxide nanoparticles (0, 0.5, 1.0, 1.5, and 2.0% weight), where the 0% weight served as the control in each group. All specimens were then subjected to artificial aging using an accelerated aging machine chamber for 12, 24, 48, and 72 hours. L*a*b* values of specimens were noted after a different aging period by a spectrophotometer and ∆E* was calculated. Statistical Analysis Two-way repeated analysis of variance (ANOVA) was done to examine the effects under test conditions (concentration and aging time) of each color group. Then color, concentration, and the aging period were subjected to three-way repeated ANOVA to investigate the effects of different colors and concentrations on ∆E*. Bonferroni’s test was performed to identify differences between groups. The significant level was at p = 0.05. Results The control group showed significantly higher ∆E* values than the test groups. The 1.5% test group showed significantly lower ∆E* compared with the others. The 0.5 to 2.0% of nano zinc oxide significantly decreased the color change of the silicone elastomer (p < 0.05), but there were no significant differences among groups. Conclusions Incorporation of 1.5% of nano zinc oxide can improve the color stability of silicone prosthesis (MDX4–4210).

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