Enhancing mechanical properties of epoxy/polyaniline coating with addition of ZnO nanoparticles: Nanoindentation characterization

Samad, Ubair Abdus; Alam, Mohammad Asif; Chafidz, Achmad; Al‐Zahrani, Saeed M.; Alharthi, Nabeel H.

doi:10.1016/j.porgcoat.2018.02.018

Cited by 52 publications

(40 citation statements)

References 40 publications

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“…As can be seen in the figure, the formulation containing a higher amount of nanoparticles possesses higher indentation hardness (F2 = 0.18 GPa) but it is still lower than the epoxy coatings without nanoparticles, while a reasonable improvement in modulus was witnessed with higher nanoparticles percentage. This increase in hardness and the improvement in modulus values are due to nanoparticles addition, as nanoparticles takes up free volume in matrix and restricts chain mobility [19,23,24]. The results obtained are in accordance with the mechanical properties described above, where an increase in nanoparticles amounts to an increase in pendulum hardness and scratch resistance.…”

Section: Nanoindentation Analysissupporting

confidence: 86%

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Synergistic Effect of Ag and ZnO Nanoparticles on Polypyrrole-Incorporated Epoxy/2pack Coatings and Their Corrosion Performances in Chloride Solutions

et al. 2019

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In this study, two formulae (F1 and F2) of epoxy/2pack coatings incorporated with polypyrrole (PPy)-conducting polymer were produced from bisphenol-A type of epoxy resin (DGEBA) with the addition of Ag and ZnO nanoparticles. The synergism effect of Ag and ZnO nanoparticles on the mechanical and corrosion resistance properties was reported. The curing agent 2,4,6-tris (dimethylaminomethyl) phenol (ARADUR 3282-BD) was used under optimized stoichiometry values. The nanoparticles ratio in different wt.% were first dispersed in solvent by the sonication process and then added to epoxy/PPy composition. All the coated steel panels were cured at room temperature in a controlled dust free environment for 7 days in order to obtain a hard and intact coating. The dispersion of nano-size ZnO and Ag pigments was investigated using scanning electron microscopy (SEM) and its composition through an energy dispersive X-ray (EDX) technique. Conventional techniques and nano-indentation were also performed to observe the effect of ZnO and Ag synergism content on the hardness and modulus of elasticity at nano scale. The corrosion behavior of the coated samples was investigated at room temperature in 3.5% NaCl solution using electrochemical impedance spectroscopy (EIS). The synergism effect of nanoparticles along with PPy resulted in an enhancement of mechanical and corrosion-resistant properties.

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Section: Nanoindentation Analysissupporting

confidence: 86%

“…As can be seen in Table 2, the obtained results suggest an increase in all mechanical properties as compared to our base formulation [17]. The increase in these properties can be attributed to the addition of ZnO nanoparticles as literature suggests ZnO enhances the mechanical properties [18,19].…”

Section: Mechanical Propertiessupporting

confidence: 60%

Synergistic Effect of Ag and ZnO Nanoparticles on Polypyrrole-Incorporated Epoxy/2pack Coatings and Their Corrosion Performances in Chloride Solutions

et al. 2019

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“…A two-step degradation can be observed from the graphs. First, a step involves weight loss starting at approximately 100 • C, proceeding until approximately 300 • C, which involves the removal of solvent traces and other volatile substances, the degradation of residual reactants, or the decomposition of the resin's low molecular weight fractions [26][27][28]. Approximately 15% of the weight loss occurred in all of the formulations at this first stage of degradation.…”

Section: Methodsmentioning

confidence: 99%

Enhancement in Nanomechanical, Thermal, and Abrasion Properties of SiO2 Nanoparticle-Modified Epoxy Coatings

et al. 2020

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Epoxy formulations containing 1%, 3%, and 5% SiO2 nanoparticles (SNPs) were produced and applied to mild steel substrates in order to improve their thermal, nanomechanical, and abrasion resistance. Field emission scanning electron microscopy (FE-SEM) was used to analyze the dispersion of nanoparticles in the final coating samples, and Energy-dispersive X-ray spectroscopy (EDX) was used to confirm the presence of nanoparticles. Thermogravimetric analysis (TGA) was employed to measure the thermal resistance of the prepared coatings. Conventional techniques were used to measure the impact and scratch resistance. For nanomechanical testing, nanoindentation was performed using a Berkovich-type indenter. Using a taber abraser, the abrasion properties of the coatings were measured. The FE-SEM images indicated good dispersion of the nanoparticles at all three different loading levels. The scratch, impact, and hardness of coatings improved with the addition of the SNPs. Nanomechanical properties, such as hardness and elastic modulus, improved when compared to the unmodified coatings. The thermal and abrasion resistances of the coatings improved with the increase in the SNPs content of the coatings. The highest mechanical, thermal, and abrasion properties were obtained for the coatings with 5% SNP content.

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“…[12] Furthermore, the presence of low contents of nanoparticles like cerium oxide (CeO2), zinc oxide (ZnO) or silica (SiO2) could also improve the mechanical and/or anticorrosion properties of the obtained nanocomposites. [13][14][15] In this study, the conductive PANi/SiO2 nanocomposites were incorporated into waterborne epoxy system towards applications in static dissipative environment-friendly coatings. The PANi/SiO2 was synthesized with different ratios between PANi and SiO2 by in-situ chemical oxidative polymerization method.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of waterborne epoxy coatings containing conductive PANi/silica nanoparticles

Dương

Thuy

Tham

et al. 2020

Vietnam Journal of Chemistry

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This work reports on the mechanical and dielectric properties of waterborne epoxy coatings containing polyaniline/silica nanocomposites (PANi/SiO2). The nanocomposites with different PANi/SiO2 ratios were synthesized by in-situ chemical oxidative polymerization method. The morphology and electric properties of PANi/SiO2 were examined by field emission scanning electron microscopy (FESEM) and standard four-probe electrode method. It was shown that the silica nanoparticles were grafted by PANi and it conducted a decrease of electrical conductivity of PANi/SiO2 composites, compared to pure PANi. The epoxy coatings containing PANi/SiO2 presented lower dielectric properties than that containing pure PANi. In contrast, the PANi/SiO2 could maintain the breakdown voltage (from 16.6 to 19.1 kV/mm) and enhance impact resistance of conducting epoxy system up to 100 kg.cm. The results revealed that the PANi/SiO2 nanocomposite can be used in electrical coating application with good dielectric strength and mechanical properties.

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Enhancing mechanical properties of epoxy/polyaniline coating with addition of ZnO nanoparticles: Nanoindentation characterization

Cited by 52 publications

References 40 publications

Synergistic Effect of Ag and ZnO Nanoparticles on Polypyrrole-Incorporated Epoxy/2pack Coatings and Their Corrosion Performances in Chloride Solutions

Synergistic Effect of Ag and ZnO Nanoparticles on Polypyrrole-Incorporated Epoxy/2pack Coatings and Their Corrosion Performances in Chloride Solutions

Enhancement in Nanomechanical, Thermal, and Abrasion Properties of SiO2 Nanoparticle-Modified Epoxy Coatings

Preparation and characterization of waterborne epoxy coatings containing conductive PANi/silica nanoparticles

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