An eco-friendly eugenol benzoxazine curcumin epoxy composites with modified nanocarbon fillers for enhanced corrosion protection

Hithesh, M. C. and Harsha, Y. M. and Mohana, K. N. S. and Sreelakshmi, M. and Sunil Kumar, M. C. (2025) An eco-friendly eugenol benzoxazine curcumin epoxy composites with modified nanocarbon fillers for enhanced corrosion protection. Surfaces and Interfaces, 72 (1). ISSN 2468-0230

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Abstract

The current study demonstrates the development of an eco-friendly and sustainable anti-corrosion coating ma- terial derived from eugenol and curcumin. The eugenol benzoxazine-curcumin epoxy (EBCE) composite coating material was fabricated by blending the different ratios of EB and curcumin-based epoxy (CE) resin. Graphene oxide (GO) and multiwalled carbon nanotube (MWCNT) are amine functionalized with 5-amino-2,4-di-tert-butyl- phenol separately, and their effects on the anti-corrosion efficacy of EBCE was evaluated. The synthesized ma- terials were characterized by FT-IR, XRD, Raman spectroscopy, XPS, EDX, FE-SEM, TGA, TEM, and SAED techniques. The surface morphology, hydrophobicity, and nature of the coatings were examined by AFM, contact angle (CA) measurements, and crosshatch adhesion test. The barrier performance of the coatings was ascertained using electrochemical impedance spectroscopy (EIS) and salt spray analysis (SSA). The EBCE (1:1) coating showed the CA of 77.47◦, and coating and charge transfer resistances (Rc and Rct) in the range of 105 Ω cm2. Induction of 0.3 wt% functionalized multiwalled carbon nanotube (FMWCNT) into EBCE coating reliably enhanced the corrosion resistance property (Rc and Rct = 106 Ω cm2), and hydrophobicity (113.10◦) up to 40th day of immersion. Some of the reported coating formulations showed lesser Rct (≤105 Ω cm2) and hydrophobicity (<110◦) compared to EBCE/FMWCNT (0.3 wt%) coatings. The higher surface area of FMWCNT core and compatibility with CE significantly enhanced the adhesion property of EBCE, and also densely occupy the voids in the coating matrix. Thus, EBCE (1:1) with 0.3 wt% FMWCNT demonstrated as a prospective material in anti- corrosion studies.

Item Type:	Article
Uncontrolled Keywords:	Barrier coating, Green nanocomposite, Bio-based polymer Curcumin based epoxy, Mild steel.
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Ms Varalakshmi
Date Deposited:	16 Oct 2025 06:11
Last Modified:	16 Oct 2025 06:12
URI:	http://eprints.uni-mysore.ac.in/id/eprint/17850

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