Effect of Silane-Functionalized RuO2 Nanoparticles on the Anticorrosive and Mechanical Properties of Poly (Methyl Methacrylate) Coatings

Xavier, Joseph Raj; Vinodhini, S. P.; Beryl, J. Raja

doi:10.1007/s11661-021-06351-0

Cited by 30 publications

(6 citation statements)

References 36 publications

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“…The degradation products in the epoxy coated surface mostly consisted of lepidocrocite (γ-FeOOH), goethite (γ-FeOOH), matrix (Fe), and magnetite (Fe 3 O 4 ) broad peaks with rising intensity at 30.1°, 33.9°, 38.1°, and 48.1°, respectively. At 30.1°, 38.1°, and 19.9°, respectively, the XRD patterns of silanized clay integrated epoxy coated steel surface reveal the same peaks with lower intensity of (γ-FeOOH), magnetite, and clay peaks. , Corrosion processes have been considerably reduced because of the insertion of silanized clay into the epoxy matrix. At the scratched surface, hard crystalline cross-linking passivity layers form, which prevent hostile ions from accessing the bare metal surface.…”

Section: Results and Discussionmentioning

confidence: 87%

“…At 30.1°, 38.1°, and 19.9°, respectively, the XRD patterns of silanized clay integrated epoxy coated steel surface reveal the same peaks with lower intensity of (γ-FeOOH), magnetite, and clay peaks. 45,46 Corrosion processes have been considerably reduced because of the insertion of silanized clay into the epoxy matrix. At the scratched surface, hard crystalline crosslinking passivity layers form, which prevent hostile ions from accessing the bare metal surface.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Incorporating Silanized Nanoclay on the Barrier, Hydrophobic and Mechanical Properties of Epoxy Resin in Chloride Environment

Xavier

Vinodhini

Srinivasan

2022

Ind. Eng. Chem. Res.

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propyl methacrylate (TMSPMA) is used to coat the surface of halloysite nanoparticles, resulting in a less hydrophilic clay surface and improved nanoparticle dispersibility in the epoxy polymer (EP). The efficiency of epoxy/clay nanocomposites in terms of thermal, mechanical, and barrier properties was studied. The results of XRD, SEM/EDX, TEM, and TGA all show that halloysite nanoparticles are silanized. EP-TMSPMA/clay coatings have a high degree of hydrophobicity (WCA: 139°) and surface roughness. Electrochemical techniques were used to investigate the corrosion resistance of coated steel substrates. The coating resistance of the EP-TMSPMA/clay nanocomposite coating was found to be over 62.98% higher than the EP coating. Even after 15 days of immersion, electrochemical tests demonstrate that EP-TMSPMA/clay has a higher coating resistance (R coat ) than plain epoxy coated mild steel. At 15 days of immersion, SECM data show that the dissipation of Fe in the EP-TMSPMA/clay coated substrate is significantly lower than the pure epoxy coated substrate. Furthermore, mechanical testing (hardness, adhesion, and tensile strength) revealed that the epoxy/silane/clay nanocomposites had improved mechanical properties. Silanized clay including epoxy nanocomposites has excellent barrier, hydrophobic, and mechanical qualities, as well as excellent oxygen and water repellent capabilities. EP-TMSPMA/clay has the best characteristics of all of the coated nanocomposites examined. Because clay/silanes are environmentally safe, this form of coating could be used as a viable coating material for industrial purposes.

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Section: Results and Discussionmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Effects of Incorporating Silanized Nanoclay on the Barrier, Hydrophobic and Mechanical Properties of Epoxy Resin in Chloride Environment

Xavier

Vinodhini

Srinivasan

2022

Ind. Eng. Chem. Res.

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“…It is confirmed from this investigation that the optimal wt% of GO/BAO‐NiS 2 is observed to be 0.3 which is used for further investigation. Figure 8 shows the SECM 2D surface topographic images of scratched pure PU, PU‐NiS 2 , PU‐BAO/NiS 2 , PU‐GO/NiS 2 , and PU‐GO/BAO‐NiS 2 coated Al alloy immersed in seawater (1 and 600 h) for the detection of Al 3+ ions at tip potential −0.85 V 34 . When UME tip glided over the scratched surface of Al alloy, an increased current is observed due to the anodic dissolution of Al into Al 3+ ions which are reduced to Al at this potential.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 8 shows the SECM 2D surface topographic images of scratched pure PU, PU-NiS 2 , PU-BAO/NiS 2 , PU-GO/ NiS 2 , and PU-GO/BAO-NiS 2 coated Al alloy immersed in seawater (1 and 600 h) for the detection of Al 3+ ions at tip potential À0.85 V. 34 When UME tip glided over the scratched surface of Al alloy, an increased current is observed due to the anodic dissolution of Al into Al 3+ ions which are reduced to Al at this potential. It is focused from Figure 8, the coatings morphology of the nanocomposite coated Al alloy was 1.0 nA at 1 h immersion, which is relatively very low current density when compared to other nanocomposites such as PU-BAO/ NiS 2 (3.8 nA), PU-GO/NiS 2 (3.5 nA), PU-NiS 2 (5.7 nA) and pure PU (6 nA).…”

Section: Secm Analysismentioning

confidence: 99%

Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Xavier

2023

J of Applied Polymer Sci

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The anticorrosion, flame retardant, and mechanical properties of polyurethane (PU) coatings have been improved by the integration of nickel disulfide (NiS2), 2,5‐Bis(4‐aminophenyl)‐1,3,4‐oxadiazole (BAO), and graphene oxide (GO). The structural, morphological, dielectric, and hydrophobic behaviors of the films were characterized for the different formulations of coatings such as pure PU, PU‐NiS2, PU‐BAO/NiS2, PU‐GO/NiS2, and PU‐GO/BAO‐NiS2 (nanocomposite) by means of scanning electron microscope/X‐ray energy dispersive spectroscopy, transmission electron microscope, thermogravimetric analysis, X‐ray photoelectron spectroscopy, X‐ray diffraction, and contact angle measurement. As a result, with the addition of only 0.3% GO/BAO‐NiS2, the dielectric constant of PU was increased by 81‐fold at 1 Hz. Additionally, the nanocomposite had significantly lower peak heat release rate and overall heat released values than pure PU, a difference of 57% and 51%, respectively, demonstrating its greater flame retardancy. The electrochemical techniques and mechanical testing confirmed that GO/BAO‐NiS2 (0.3%) composite exhibit enhanced anticorrosive, hydrophobic, flame retardancy, and mechanical performance of the PU coating. The super hydrophobic behavior is confirmed by its water contact angle of 165°. Furthermore, the resistance of the nanocomposite was found to be much higher (16,985.6 kΩ.cm2) than that of the pure PU (145.4 kΩ.cm2) and the microhardness and tensile strength were increased sharply. Therefore, the nanocomposite could act as a potential coating material for industrial applications.

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“…A larger radius of the capacitance arc observed in the Nyquist plot suggests improved corrosion resistance in the coating. [59,60] The capacitive arc increases with increasing weight percentage of the nanocomposites in the PU resin. This is attributed to the increased concentration of nanocomposites in the PU resin, which augments the bonding strength to the metal surface while minimizing agglomeration.…”

Section: Eis Measurements Of Pu-gcn-abes/tan Coatingsmentioning

confidence: 99%

Innovative Nanocomposite Coating for Aluminum Alloy in the Aircraft Manufacturing Industry with Increased Mechanical Strength, Flame Retardancy, and Corrosion Resistance

Xavier

2024

ChemistrySelect

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Nanocomposites containing impermeable two‐dimensional materials are of significant interest for protecting metals against corrosion. Incorporating 4‐aminobutyltriethoxysilane (ABES) functionalized tantalum nitride (TaN) into a coating matrix enhances the barrier effect due to TaN's notable chemical and thermal stability. When integrated with graphitic carbon nitride (GCN) in polyurethane (PU), functionalized TaN significantly improves corrosion resistance and fire‐retardant capabilities. Electrochemical evaluations of aluminum coated with varying amounts of functionalized TaN/GCN in PU demonstrated substantial enhancements in protective behavior in chloride environments. The PU nanocomposite exhibited superior flame retardancy, with significant reductions in peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) compared to pure PU. Flame retardancy tests demonstrated increased thermal stability, attributed to the synergistic effects between GCN and silanized TaN. Electrochemical impedance spectroscopy (EIS) measurements showed a high coating resistance of 8.89×1011 Ω cm2 for PU/functionalized TaN/GCN, even after 40 days of electrolyte exposure. Additionally, the PU/functionalized TaN/GCN coating demonstrated exceptional water repellency, indicated by a water contact angle (WCA) of 164°. Mechanical tests revealed that PU/functionalized TaN/GCN exhibited favorable adhesion strength and hardness, maintaining integrity even under prolonged immersion. These findings suggest that this nanocomposite is a promising coating component for aerospace applications. The integration of functionalized TaN/GCN within the PU matrix presents a novel approach to developing multifunctional coatings with enhanced performance across various metrics essential for aerospace materials.

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Effect of Silane-Functionalized RuO2 Nanoparticles on the Anticorrosive and Mechanical Properties of Poly (Methyl Methacrylate) Coatings

Cited by 30 publications

References 36 publications

Effects of Incorporating Silanized Nanoclay on the Barrier, Hydrophobic and Mechanical Properties of Epoxy Resin in Chloride Environment

Effects of Incorporating Silanized Nanoclay on the Barrier, Hydrophobic and Mechanical Properties of Epoxy Resin in Chloride Environment

Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Innovative Nanocomposite Coating for Aluminum Alloy in the Aircraft Manufacturing Industry with Increased Mechanical Strength, Flame Retardancy, and Corrosion Resistance

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