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Preparation of electrospun chitosan/poly(vinyl alcohol) membranes

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Abstract

Electrospinning of chitosan from its solutions in 2% aqueous acetic acid was studied by adding poly(vinyl alcohol) (PVA) as a “guest” polymer. Properties of the chitosan/PVA solutions including viscosity, conductivity, and surface tension were measured, and effects of the polymer concentration, chitosan/PVA mass ratio and processing parameters (applied voltage, flow rate, capillary-to-collector distance) on the electrospinnability of chitosan/PVA were investigated. Analyses of scanning electron micrographs and transmission electron micrographs suggested that the chitosan/PVA ultrafine fibers were often obtained along with beads, and chitosan was located in the elctrospun fibers as well as in the beads. Uniform chitosan/PVA fibers with an average diameter of 99 ± 21 nm could be prepared from a 7% chitosan/PVA solution in 40:60 mass ratio. Results of Fourier transform infrared spectroscopy and X-ray diffraction demonstrated that there were possible hydrogen bonds between chitosan and PVA molecules, which could weaken the strong interaction in chitosan itself and facilitate chitosan/PVA electrospinnability. The electrospun chitosan/PVA membranes showed higher water uptake and would have potential applications in wound dressings.

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Acknowledgment

Financial support of this work was provided by Natural Science Foundation of China via grant no. 50273027.

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Correspondence to Xiaoyan Yuan.

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Zhang, Y., Huang, X., Duan, B. et al. Preparation of electrospun chitosan/poly(vinyl alcohol) membranes. Colloid Polym Sci 285, 855–863 (2007). https://doi.org/10.1007/s00396-006-1630-4

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  • DOI: https://doi.org/10.1007/s00396-006-1630-4

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