UV-Protected Polyurethane/ f-Oil Fly Ash-CeO2 Coating: Effect of Pre-Mixing f-Oil Fly Ash-CeO2 with Monomers

Mohammad Mizanur Rahman; Md Hasan Zahir; Aasif Helal; Rami K Suleiman; Bashirul Haq; A Madhan Kumar

doi:10.3390/polym13193232

UV-Protected Polyurethane/ f-Oil Fly Ash-CeO₂ Coating: Effect of Pre-Mixing f-Oil Fly Ash-CeO₂ with Monomers

Polymers (Basel). 2021 Sep 23;13(19):3232. doi: 10.3390/polym13193232.

Authors

Mohammad Mizanur Rahman¹, Md Hasan Zahir², Aasif Helal³, Rami K Suleiman¹, Bashirul Haq⁴, A Madhan Kumar¹

Affiliations

¹ Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
² Interdisciplinary Research Center for Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
³ Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
⁴ College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.

Abstract

A series of UV-protected coatings were prepared using cerium-oxide-functionalized oil fly ash (f-OFA-CeO₂) in waterborne polyurethane (WBPU) dispersions. Three monomers, namely, poly(tetramethyleneoxide glycol) (PTMG), polydimethylsiloxane-hydroxy terminated (PDMS) and 4,4-dicyclohexylmethane diisocyanate (H₁₂MDI), were used to pre-mix with f-OFA-CeO₂ separately, followed by the synthesis of WBPU/f-OFA-CeO₂ dispersions. The f-OFA-CeO₂ distribution and enrichment into any part (top/bottom/bulk) of the coating was strongly affected by the pre-mixing of f-OFA-CeO₂. The f-OFA-CeO₂ was densely distributed in the top, bottom and bulk when the f-OFA-CeO₂ was pre-mixed with PDMS, H₁₂MDI and PTMG, respectively. Only an f-OFA-CeO₂-enriched top surface showed excellent UV protection. The lowest UV-degraded exposed coating was found when the top surface of the coating was f-OFA-CeO₂-enriched.

Keywords: coating; degradation; waterborne polyurethane.