A research team led by Marwa M. Sayed has developed novel bio-based polyurethanes (PUHs) derived from castor oil, featuring improved luminescence and outstanding corrosion protection for mild steel. The polyurethanes were synthesised by reacting castor oil polyol (COP) with hexamethylene diisocyanate (HMDI) and fluorescent azine segments, such as 1,4-phenylene bis(2,4-dihydroxy benzylidene) azine (PDaz) or modified epoxy castor oil (Eaz). Reading tip: Functional CoatingsThe EC Tech Report “Functional Coatings” gives you an up-to-date bundle on functional coatings with articles, videos and other handpicked content. In addition to technical articles about the latest technical developments, this all-in-one multi-media pack is rounded off with valuable market insights and important fundamentals about functional coatings formulation. Effective corrosion protection using bio-based materialsThe best performance was achieved by PUH3, which demonstrated a corrosion inhibition efficiency of 97.6 %.