Journal
EUROPEAN POLYMER JOURNAL
Volume 50, Issue -, Pages 18-29Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2013.10.016
Keywords
Electrospinning; Polyelectrolyte complex; Chitosan; Poly(epsilon-caprolactone); Antibacterial activity
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Funding
- National Science Fund [DCVP 02/2 - UNION]
- OP-HRD of the European Social Fund [BG051PO001-3.3.06-006]
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Novel antibacterial nanofibrous mats from poly(epsilon-caprolactone) (PCL) were prepared using the formation of polyelectrolyte complex as a tool for tuning the properties of the mats. Two approaches were applied: (i) coating the surface of PCL mats with crosslinked poly(acrylic acid) (PAAcr) followed by the formation of a polyelectrolyte complex (PEC) with N,N,N-trimethylchitosan iodide (TMCh) and (ii) grafting of PAA on the surface of PCL mats and subsequent PEC formation between grafted PM and TMCh. The formation of PEC-based coating on the fiber surface was demonstrated by means of scanning electron microscopy (SEM), attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The microbiological screening revealed that in contrast to the pristine PCL mats, the PEC-coated PCL mats are effective in inhibiting the growth of the Gram-positive bacteria Staphylococcus aureus and Gramnegative bacteria Escherichia coli as well as in suppressing the adhesion of pathogenic bacteria S. aureus. (C) 2013 Elsevier Ltd. All rights reserved.
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