Preparation of electrospun chitosan/poly(vinyl alcohol) membranes

Yuanyuan Zhang, Xiaobo Huang, Bin Duan, Lili Wu, Shuo Li, Xiaoyan Yuan

Research output: Contribution to journalArticle

146 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)855-863
Number of pages9
JournalColloid and Polymer Science
Volume285
Issue number8
DOIs
StatePublished - May 1 2007

Keywords

  • Chitosan
  • Electrospinnability
  • Hydrogen bond
  • Morphology
  • Poly(vinyl alcohol)

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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