Mn(II)- and Zn(II)- Based Nanocomposites Metallopolymer for Corrosion Protective Coatings

The transition from conventional polymeric material to green and sustainable, environment-friendly biomaterials has been actively explored. The objective of the work involves the formulation of an oleo-polymer (corn oil, CO), hybridization with metallic ions (Zn2+ and Mn2+) through coordination bonding, study of the impact of fully/half-filled d-orbitals, and development of eco-friendly polymeric coating material. The formation of the nanoclusters (10-20 nm) within the polymeric matrix was estimated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Fourier transform infrared (FTIR) analysis supports the predicted chemical mechanism involved during poly-urethanation of the metal-containing CO fatty amides. Interestingly, opposite to our expectations the metal ions with fully filled d-orbital (Zn2+) showed relatively (Mn2+) better thermal and anti-corrosion properties. The good adhesive strength of metallopolymers and the impact of the d-orbital electrons on the corrosion protective performance, which was by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP). These nanocomposite coatings could be a suitable alternatives to petrochemical-based polymers.

Automated summary

The objective of this study was to develop an eco-friendly polymeric coating material by formulating an oleo-polymer hybridized with metallic ions through coordination bonding. The formation of nanoclusters within the polymeric matrix was confirmed by SEM and TEM analysis. Surprisingly, the metal ions with fully filled d-orbital (Zn2+) showed better thermal and anti-corrosion properties compared to Mn2+. The impact of d-orbital electrons on the corrosion protective performance was studied using EIS and PDP tests.