A Study on the Improvement of Dielectric, Anticorrosive and Mechanical Properties of Newly Synthesized Epoxy Coatings Containing Silanized CNTs-TiS2 Nanocomposites for Aerospace and Automotive Applications

The mechanical, thermal, electrical, and electrochemical properties of carbon nanotubes (CNTs) are excellent. The addition of titanium disulphide (TiS2) and (3-mercaptopropyl)trimethoxysilane (MPTMS) to epoxy matrix (EP) coatings has improved the anticorrosive and mechanical properties of carbon nanotubes (CNTs) for CNT-based surface modification. The structural, morphological, and dielectric behaviours of the films were characterized for the pristine CNTs, MPTMS/CNTs, CNTs/TiS2 and MPTMS/CNTs-TiS2 by means of SEM/EDX, TEM, TGA/XRD, XPS, and XRD measurements. As a result, with the addition of only 0.3% TiS2-CNTs-MPTMS, the dielectric constant of EP was increased by 80-fold at 1 Hz. The electrochemical techniques and mechanical testing confirmed that MPTMS/CNTs-TiS2 (0.3%) composite exhibit enhanced anticorrosive and mechanical performance of the EP coating. The new EP-MPTMS/CNTs-TiS2 coating had superior hydrophobic properties (WCA: 169º). Furthermore, the resistance of the EP-MPTMS/CNTs-TiS2 was found to be much higher (17787 k?.cm2) than that of the pure EP (110 k?.cm2) and the microhardness (167.2 kgf/mm2), adhesion strength (19.7 MPa) and tensile strength (236 MPa) of EP-MPTMS/CNTs-TiS2 were increased sharply. The results of this study conclude that EP-MPTMS/CNTs-TiS2 nanocomposites could act as highly adhesive anticorrosion coatings on Mg alloy when exposed to seawater for maximum duration. Hence, this EP-MPTMS/CNTs-TiS2 nanocomposite could be used as the vital coating materials in automotive and aerospace industries.

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» Reference: 10.1007/s12633-023-02374-x

» Publication Date: 22/03/2023

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