RF hydrazine plasma modification of chitosan for antibacterial activity and nanofiber applications |
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Authors: | Uygun Aysegul Kiristi Melek Oksuz Lutfi Manolache Sorin Ulusoy Seyhan |
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Institution: | aSuleyman Demirel University, Faculty of Arts and Science, Department of Chemistry, 32260 Isparta, Turkey;bSuleyman Demirel University, Faculty of Arts and Science, Department of Physics, 32260 Isparta, Turkey;cUniversity of Wisconsin-Madison, Center for Plasma-Aided Manufacturing, Madison, WI, USA;dSuleyman Demirel University, Faculty of Arts and Science, Department of Biology, 32260 Isparta, Turkey |
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Abstract: | Chitosan nano powders were modified using RF hydrazine plasma produced at low pressure (26.66 Pa) with 13.56 MHz frequency at a power of 100 W for 30 min. Characterization and investigation of the properties of plasma-modified chitosan (PMCh) and non-modified chitosan (Ch) were carried out using an optical monochromator, FTIR, florescence analysis, TGA, SEM, and X-ray techniques. FTIR spectra of PMCh indicated a band broadening at 3436 cm−1 that confirmed increasing functional groups based on H-bonding. The number of NH2 groups was determined from fluorescence analysis. TGA analysis shows that the moisture absorption is three times higher in the PMCh structure. Ch and PMCh in PVA solutions were used to produce nanofibers by the electrospinning method; average fiber diameters were 480 and 280 nm for Ch and PMCh, respectively. It was found that the antibacterial effect of PMCh is better than the Ch for Gram-positive strains. |
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Keywords: | Chitosan Plasma modification Hydrazine Nanofiber Antibacterial |
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