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Fabrication and characterization of chitosan/poly(vinyl alcohol) electrospun nanofibrous membranes containing silver nanoparticles for antibacterial water filtration

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Abstract

Electrospun nanofibrous membranes (ENMs) were fabricated based on chitosan/poly(vinyl alcohol) (CS/PVA) with a 70/30 mass ratio containing silver nanoparticles (AgNPs) via the electrospinning method. AgNPs were produced on the surface of CS/PVA nanofibers by adding AgNO3 to a CS/PVA blend solution as a silver rendering component. The presence of AgNPs in the polymer blend solution was detected by UV spectrophotometry. The morphology of nanofibers before and after cross-linking with glutaraldehyde was investigated by the field emission scanning electron microscopy. The formation and size distribution of AgNPs onto the surface of nanofibers were observed by transmission electron microscopy and confirmed by energy dispersing X-ray spectroscopy. As-spun and cross-linked CS/PVA nanofibers revealed a smooth surface with diameters ranging from 58 to 73 nm and 95 to 109 nm, respectively. The effect of AgNP formation on the chemical structure of nanofibers was explored by Fourier transform infrared spectroscopy. Static and dynamic antibacterial filtration efficiencies of CS/PVA ENMs, containing differing amounts of AgNO3, have been tested against Escherichia coli, a gram negative bacterium. The antibacterial assessment results exhibited a significant increase in both static and dynamic antibacterial filtration efficiencies of the prepared CS/PVA ENMs by addition of AgNO3 as a bactericidal agent.

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Acknowledgments

This work is the result of two years of research in the Nanopolymer Laboratory of Islamic Azad University, Science and Research Unit. The authors would like to thank Jessica Wilkerson, Tooraj Adibzadeh, and Hamid Bornasi for their co-operations.

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Authors and Affiliations

  1. Department of Polymer Engineering, Science and Research Branch, Islamic Azad University, PO Box: 14155-4933, Tehran, Iran

    Siavash Adibzadeh, Saeed Bazgir & Ali A. Katbab

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  1. Siavash Adibzadeh
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  2. Saeed Bazgir
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  3. Ali A. Katbab
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Correspondence to Saeed Bazgir.

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Adibzadeh, S., Bazgir, S. & Katbab, A.A. Fabrication and characterization of chitosan/poly(vinyl alcohol) electrospun nanofibrous membranes containing silver nanoparticles for antibacterial water filtration. Iran Polym J 23, 645–654 (2014). https://doi.org/10.1007/s13726-014-0258-3

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  • DOI: https://doi.org/10.1007/s13726-014-0258-3

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