Modification of electrospun poly(Ε-caprolactone) mats by formation of a polyelectrolyte complex between poly(acrylic acid) and quaternized chitosan for tuning of their antibacterial properties

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20143900073415
机构：
[1] Kalinov, Kalin
[2] Ignatova, Milena
[3] Maximova, Vera
[4] Rashkov, Iliya
[5] Manolova, Nevena
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Ignatova, Milena | 1600年 / Elsevier Ltd卷 / 50期
关键词：
Novel antibacterial nanofibrous mats from poly(Ε-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 PAA 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 Gram-negative bacteria Escherichia coli as well as in suppressing the adhesion of pathogenic bacteria S. aureus. © 2013 Elsevier Ltd. All rights reserved;
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