Scientific African (Jul 2023)

Development of functional polyurethane-cenosphere hybrid composite coatings from ricinus communis seed oil

  • Tolutope O. Siyanbola,
  • Adedamola D. Adebowale,
  • Samuel A. Adeboye,
  • Spandana J.V. Rao,
  • Nelly A. Ndukwe,
  • Ezekiel F. Sodiya,
  • Adesola A. Ajayi,
  • Emmanuel T. Akintayo,
  • P. Basak,
  • Ramanuj Narayan

Journal volume & issue
Vol. 20
p. e01711

Abstract

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The usage of castor seed oil (CSO) as a sustainable and non-toxic biodegradable substitute for non-eco-friendly petroleum-based chemicals must be considered. This renewable feedstock (seed oil) is vital for developing polymeric organic coatings. This report investigates the one-spot synthesis of castor seed oil, 1,1,1-Tris(hydroxymethyl) propane (cross-linker), Isophorone diisocyanate, and cenosphere nanoparticles incorporated within the polymer matrix. The hybrid coatings were characterised using FT-IR, NMR, FESEM, and XRD. The FT-IR spectrum showing the presence of absorption peaks at 1350 cm-1, 1102 cm-1, and 1000 cm-1, which represent the (Al=O), (SiO-Si), and (AlO4) functional groups, respectively confirms the modifications carried out on the cenosphere fly ash nanoparticles. The thermal stability of the synthesised composites was evaluated on a thermogravimetric analyser (TGA). The TGA thermograms showed improved thermal stability as the percentage composition of CFA material increased in the coating system. The antimicrobial activity indicates that the PU-CFA composite bettered resistance toward Staphylococcus aureus and Escherichia coli.

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