Synthesis of Thiourea Polyurethane Composite Modified with Benzaldehyde and its Antimicrobial Properties
El Sadda, R., Eissa, M., Moawed, E., El-Zahed, M. (2024). Synthesis of Thiourea Polyurethane Composite Modified with Benzaldehyde and its Antimicrobial Properties. EKB Journal Management System, 14(1), 109-118. doi: 10.21608/sjdfs.2024.252442.1150
Rana El Sadda; Mai S. Eissa; ElHossein A. Moawed; Mohamed M. El-Zahed. "Synthesis of Thiourea Polyurethane Composite Modified with Benzaldehyde and its Antimicrobial Properties". EKB Journal Management System, 14, 1, 2024, 109-118. doi: 10.21608/sjdfs.2024.252442.1150
El Sadda, R., Eissa, M., Moawed, E., El-Zahed, M. (2024). 'Synthesis of Thiourea Polyurethane Composite Modified with Benzaldehyde and its Antimicrobial Properties', EKB Journal Management System, 14(1), pp. 109-118. doi: 10.21608/sjdfs.2024.252442.1150
El Sadda, R., Eissa, M., Moawed, E., El-Zahed, M. Synthesis of Thiourea Polyurethane Composite Modified with Benzaldehyde and its Antimicrobial Properties. EKB Journal Management System, 2024; 14(1): 109-118. doi: 10.21608/sjdfs.2024.252442.1150

Synthesis of Thiourea Polyurethane Composite Modified with Benzaldehyde and its Antimicrobial Properties

Scientific Journal for Damietta Faculty of Science
Volume 14, Issue 1, March 2024, Page 109-118  XML PDF (638.99 K)
Document Type: Original articles
DOI: 10.21608/sjdfs.2024.252442.1150
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Authors
Rana El Sadda1; Mai S. Eissa2; ElHossein A. Moawed3; Mohamed M. El-Zahed email orcid 4
1Chemistry department , faculty of science, Damietta university
2Department of Chemistry, Faculty of Science, Damietta University
3Chemistry Department, Faculty of Science, Damietta University, Egypt
4Department of Botany and Microbiology, Faculty of Science, Damietta University, New Damietta, Egypt.
Abstract
New biologically active polyurethane composites were prepared by surface modification of polyurethane foams with thiourea and benzaldehyde. The current work introduces an efficient antimicrobial composite of thiourea polyurethane foam/benzaldehyde (TPU/Benzaldehyde). The main techniques used for thiourea polyurethane foam/benzaldehyde composites identification were Infrared spectra, Ultraviolet-Visible spectra, bandgap energy, X-ray diffraction, Scanning electron microscopy, magnetic susceptibility, and pH of zero-point charge (PHZPC). Surface functions such as carboxylic, lactonic, and phenolic hydroxyl groups have been identified via Boehm titration. The chemical stability of TPU/Benzaldehyde was tested in diverse buffer solutions (pH: 2–14) and various organic solvents (e.g., CH3OH, CH3COCH3, C6H6, C6H5CH3, DMF, and DMSO). The weights of TPU/Benzaldehyde were unaffected, which confirm its chemical stability. TPU/Benzaldehyde was tested for antibacterial and antifungal activity against Gram-negative bacterium E. coli, Gram-positive bacterium B. cereus, and fungus A. niger. TPU/Benzaldehyde had higher inhibition zones against Gram-positive B. cereus than Gram-negative E. coli, with inhibition zones of 18±0.03 and 16±0.03 mm, respectively. Also, TPU/Benzaldehyde had higher antifungal action against A. niger, with inhibition zones of 20±0.24 mm, than the standard antifungal agent, Fluconazole (14±0.14 mm).
Keywords
Benzaldehyde, thiourea polyurethane foam; Bacillus cereus; Escherichia coli; Aspergillus niger
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