Nanocomposite framework of chitosan/polyvinyl alcohol/ZnO: Preparation, characterization, swelling and antimicrobial evaluation
| Autor: | Nabel A. Negm, Zizi I. Abdeen, Ahmed F. El Farargy |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
macromolecular substances 02 engineering and technology 010402 general chemistry 01 natural sciences Polyvinyl alcohol Chitosan chemistry.chemical_compound Materials Chemistry medicine Thermal stability Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Spectroscopy chemistry.chemical_classification Nanocomposite integumentary system technology industry and agriculture Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Self-healing hydrogels Swelling medicine.symptom 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Molecular Liquids. 250:335-343 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2017.12.032 |
| Popis: | Chitosan was prepared by deactylation of chitin. Chitosan (CH)/polyvinyl alcohol (PVA) hydrogel and CH/PVA/ZnO nanocomposite were prepared using gluteraldehyde as crosslinking agent. The structures of CH, CH/PVA and CH/PVA/ZnO were investigated using Fourier transformer infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The factors affect the swelling properties of the prepared polymers were studied including: cross linker ratio, temperature, pH and immersion time. The properties of the prepared hydrogels were studied and discussed including the mechanical properties and the thermal stability. The evaluated biocidal activities of the different compounds were performed using inhibition zone diameter measurements. The antimicrobial activities of the prepared CH/PVA polymer were higher than the conventional biocides of Erythromycin and Metronidazole; while the activity was highly improved after ZnO nanocomposites formation. It was found that the increase of ZnO ratio in the formed nanocomposite increases their antimicrobial activities against gram positive and gram negative bacteria. |
| Databáze: | OpenAIRE |
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