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Hybrid nanofibrous yarns based on N-carboxyethylchitosan and silver nanoparticles with antibacterial activity prepared by self-bundling electrospinning by Hristo Penchev; Dilyana Paneva; Nevena Manolova; Iliya Rashkov is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Hybrid nanofibrous materials with antibacterial activity consisting of yarns from N-carboxyethylchitosan (CECh) and poly(ethylene oxide) (PEO) that contain 5 wt % or 10 wt % silver nanoparticles (AgNPs) were prepared. This was achieved by electrospinning using formic acid as a solvent and as a reducing agent for silver ions. AgNO 3 was used as an Ag + -containing salt. Its concentration was selected to be 0.02 mol/L or 0.04 mol/L in order the content of the AgNPs in the electrospun nanofibers to be 5 wt % or 10 wt %, respectively. The self-bundling of the fibers into yarns with a mean diameter of ca. 35 lm was enabled only by using a grounded needle electrode. The reduction of the silver ions to an elemental silver was evidenced by UV-vis spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The transmission electron microscopy (TEM) analyses revealed that AgNPs formed at AgNO 3 concentration of 0.02 mol/L were with a mean diameter of 4 ± 0.5 nm and were distributed uniformly within the fiber. The increase of AgNO 3 concentration to 0.04 mol/L led to the preparation of AgNPs with a higher mean diameter and a broader diameter distribution as well as to a

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Author

Hristo Penchev; Dilyana Paneva; Nevena Manolova; Iliya Rashkov

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0008-6215)

Published

2010

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)