Adebowale, Adedamola D. and Covenant University, Theses (2022) DEVELOPMENT OF FUNCTIONAL POLYURETHANE-CENOSPHERES HYBRID NANOCOMPOSITE COATINGS FROM Ricinus communis SEED OIL. Masters thesis, Covenant University Ota.
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Abstract
The utilisation of plant seed oils as a sustainable and biodegradable substitute for petroleum-based chemicals cannot be overemphasised. This renewable feedstock is vital for the development of polymeric organic coatings. This report investigates the one-spot synthesis of castor seed oil, Isophorone diisocyanate, Trimethylolpropane (cross linker), and the percentage composition of prepared cenosphere nanoparticles incorporated within the polymer matrix. The hybrid coatings were characterised using FT-IR, XRD, SEM, and NMR, as they all confirm the presence of the cenosphere fly ash nanoparticles in the polyurethane. The FT-IR spectrum shows the presence of absorption peaks at 1350 cm-1, 1102 cm-1, and 1000 cm-1 which represent the (Al=O), (SiO-Si), (AlO4) functional groups respectively. The SEM EDX of the PU-CFA revealed that aluminium, silica and carbon have a percentage weight of 2.8 Wt.%, 4.6 Wt.%, 40.2 Wt.% respectively. The thermal stability of the synthesised composites was evaluated on a thermogravimetric analyzer (TGA). The TGA revealed that PU-CFA lost 50%, 30%, and 90% of its weight at 418.16℃, 470.17℃, 506.96℃ respectively. The antimicrobial activity shows that PU-CFA composite showed improved resistance towards Staphylococcus aureus and Escherichia coli.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Castor, Cenospheres, Antimicrobial, Polyurethane, Nanoparticles. |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Chemistry |
| Depositing User: | nwokealisi |
| Date Deposited: | 29 Aug 2022 13:50 |
| Last Modified: | 29 Aug 2022 13:50 |
| URI: | http://eprints.covenantuniversity.edu.ng/id/eprint/16144 |
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