Adebamiro, Oluwafayokunmi and Covenant University, Theses Masters (2024) ENHANCING THE ANTICORROSIVE AND ANTIMICROBIAL ACTIVITIES OF POLYURETHANE COATING USING 4-NITRO-O-PHENYLENEDIAMINE COUPLED WITH APTMS-SiO2. Masters thesis, Covenant University.
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Abstract
The research explores the synthesis and properties of polyurethane-urea coatings derived from castor seed oil (CSO), Toluene diisocyanate (TDI) and 4-nitro-o-phenylenediamine (4NPD) as a sustainable alternative to petrochemical-based polymers. Given the increasing environmental concerns and the need for biodegradable materials, this study focuses on utilising renewable plant biomass materials, particularly non-edible vegetable oils, to produce environmentally friendly polymeric coatings. The experimental approach involved the synthesis of poly(epichlorohydrin-triol) (PECH-triol) and its subsequent reaction with CSO and toluene diisocyanate (TDI) to form polyurethane. The inclusion of 4NPD and APTMS-SiO2 aimed to enhance the attendant properties of the resultant coatings. Comprehensive analyses were conducted to characterise the synthesised materials. Fourier Transform Infrared Spectroscopy (FT-IR) and Nuclear Magnetic Resonance (NMR) confirmed the successful incorporation of 4-nitro-o-phenylenediamine 4NPD and APTMS-SiO2 into the polyurethane matrix. X-ray Diffraction (XRD) analysis revealed the crystallinity of the coatings. The salt spray test shows that the more the nanomaterial, the higher it resists corrosion. The water contact angle demonstrates that the 3% APTMS-SiO2 is more hydrophobic than the others, while Thermogravimetric Analysis (TGA) demonstrated their thermal stability. Furthermore, antimicrobial tests showed significant activity against various bacterial and fungal strains. It is hereby concluded that 4NPD enhances the coating strength and adhesives. It was also observed that PUU-ASiO2 with 3% ASiO2 show a more substantial effect on the attendant property of Polyurethane-urea coatings.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | 4-nitro-o-phenylenediamine, Antimicrobial, Polyurethane-urea, Nanomaterial, Castor oil |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Chemistry |
| Depositing User: | Patricia Nwokealisi |
| Date Deposited: | 23 Sep 2024 14:51 |
| Last Modified: | 23 Sep 2024 14:51 |
| URI: | http://eprints.covenantuniversity.edu.ng/id/eprint/18427 |
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