Investigation of anticorrosion, flame retardant and mechanical properties of polyurethane/GO nanocomposites coated AJ62 Mg alloy for aerospace/automobile components

Xavier, Joseph Raj

doi:10.1016/j.diamond.2023.110025

Cited by 34 publications

(3 citation statements)

References 56 publications

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“…These findings, as elucidated in previous investigations, serve as evidence for the current study. [56][57][58] With the addition of TaN, ABES/TaN, and GCN-ABES/TaN into the PU resin, the PHRR, and THR are completely reduced compared to those of the PU resin. The HRR typically decreases as the amount of char formed increases in the prepared nanocomposites.…”

Section: Flame Resistance Testing Of Gcn-abes/tan Nanocompositesmentioning

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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Section: Flame Resistance Testing Of Gcn-abes/tan Nanocompositesmentioning

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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“…Water heating, electricity producing, heating, and cooling systems are only a few of the industrial, commercial, and domestic uses for aluminum alloys. [6][7][8][9][10] To slow down the degradation of the material and extend the life of the aluminum alloy, polymers are frequently added. Conducting polymers are among the polymers that are frequently used to prevent energy loss.…”

Section: Introductionmentioning

confidence: 99%

“…Among all the mentioned materials, solar companies use low density aluminum alloy because of its superior properties such as light weight, high strength, excellent electrical and thermal conductivities, high surface reflectivity, and corrosion resistance. Water heating, electricity producing, heating, and cooling systems are only a few of the industrial, commercial, and domestic uses for aluminum alloys 6–10 . To slow down the degradation of the material and extend the life of the aluminum alloy, polymers are frequently added.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotube‐based polymer nanocomposites: Evaluation of barrier, hydrophobic, and mechanical properties for aerospace applications

Xavier,

Sadagopan Pandian

2023

Polymer Engineering & Sci

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The anticorrosive and mechanical properties of carbon nanotubes (CNTs) in epoxy resin (EP) coatings have been improved by the integration of molybdenum disulfide (MoS2) and 3‐aminopropyltrimethoxysilane (APTMS) for surface modification based on CNTs. SEM/EDX, TEM, TGA/XRD, XPS, and XRD techniques were used to characterize the composites for the various formulations, including APTMS/CNTs, CNTs/MoS2, and APTMS/CNTs‐MoS2. By including APTMS/CNTs‐MoS2 composite, the EP coating exhibits improved anticorrosive and mechanical performance, as demonstrated by electrochemical methods and mechanical testing. Superior hydrophobic property of EP‐APTMS/CNTs‐MoS2 is confirmed by its WCA of 167°. Additionally, it was discovered that the EP‐APTMS/CNTs‐MoS2 had a resistance that was significantly larger (17,421 kΩ.cm2) than the plain epoxy (102 kΩ.cm2), and its hardness (1695 MPa), adhesion (19.7 MPa), and tensile (237 MPa) properties all are improved significantly. Therefore, the newly developed EP‐APTMS/CNTs‐MoS2 could act as the vital material for coating AA7475 aluminum alloy used in aerospace applications.

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Impact resistance of polyurethane elastomer enhanced by organic montmorillonite with interlayer anchored polymer chains

Zhao,

Fu,

et al. 2024

Polymer Composites

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The development of materials with excellent impact resistance is essential for safety protection. Polyurethane elastomer (PUE) is widely used in impact protection; however, it has low dynamic compressive strength and poor energy absorption efficiency under high‐speed impact, limiting its in‐depth application in the protection field. Herein, an organic montmorillonite (MMT) with interlayer anchored polymer chains, named M@NH3+, was synthesized via the dual modification of MMT involving surface grafting and cation intercalation by macromolecular amino silane, which was used to enhance the impact resistance of PUE. Based on the uniform dispersion of M@NH3+ within the PUE matrix, the strong bonding at the polymer‐filler interface and the synergistic action between M@NH3+ lamellae, PUE‐M@NH3+ composite exhibited excellent mechanical properties and energy absorption capacity. Compared with pure PUE, the elastic modulus (+98.3%), static compressive strength (+37.0%), dynamic compressive strength (+35.4%) and impact energy absorption (+50.8%) of PUE‐2wt%M@NH3+ were significantly improved, which shows that it has potential applications in the field of high‐speed impact protection.Highlights Organic MMT with interlayer anchored polymer chains was prepared. The large interlayer spacing of M@NH3+ facilitates its dispersion within the matrix. The interconnected M@NH3+ lamellae can collaboratively disperse impact stress. The impact energy absorption of PUE composite has been remarkably improved.

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Investigation of anticorrosion, flame retardant and mechanical properties of polyurethane/GO nanocomposites coated AJ62 Mg alloy for aerospace/automobile components

Cited by 34 publications

References 56 publications

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

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

Carbon nanotube‐based polymer nanocomposites: Evaluation of barrier, hydrophobic, and mechanical properties for aerospace applications

Impact resistance of polyurethane elastomer enhanced by organic montmorillonite with interlayer anchored polymer chains

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