Article

Chitosan‐coated paper: Effects of nisin and different acids on the antimicrobial activity

Journal of Applied Polymer Science (Impact Factor: 1.77). 11/2004; 94(3):986 - 993. DOI: 10.1002/app.20701

ABSTRACT

Chitosan coatings prominently improved both the gloss and oxygen barrier properties of paper. The gloss value in the machine direction was increased as a function of added chitosan. An oxygen-permeability value of 1.1 cm3/m2 d was obtained when 6.9 g/m2 chitosan was applied to 80 g/m2 copy paper. In addition, the effects on the mechanical properties were positive, but not significant. The water-vapor permeability of the paper increased as a result of the chitosan coating. Chitosan dissolved in 1.6, 3.2, and 6.4% lactic acid showed antimicrobial activity against Bacillus subtilis, whereas acetic and propionic acids (1.6, 3.2, and 6.4%) did not produce any notable activity. Nisin (0.08 g/L) did not enhance the antimicrobial activity of coatings prepared from chitosan dissolved in different acids. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 986–993, 2004

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    • "Preparation of CMC-based coating solutions was obtained by dispersing the appropriate amount of CMC powder in distilled water, at concentrations of 1%, 2% and 3%, at 60 °C while stirring for 30 min. Chitosan coating solutions were prepared by dissolving chitosan 1% (w/v) in 1% (v/v) acetic acid solution with agitation using a magnetic stirrer at 45°C for about 20 min (Vartiainen et al. 2004). All coating solutions were degassed to remove the entrapped air bubbles during mixing. "

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    • "Table 3. Chitosan for packaging films: activities and observations of various researchers Chitosan films combined with various ingredients Activities and observations References Processed meats and seafood, as well as nisin and coated onto the surfaces of paper For inhibiting microorganisms Vartiainen et al. (2004) "
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    • "Cutter and Miller (2004) also demonstrated that Brochothrix thermosphacta and L. monocytogenes were inhibited on hot dog surfaces following treatments with nisin-incorporated collagen (Coffi) films (NICF) subjected to temperature abuse as well as long term refrigerated storage. Chitosan films have been made following treatments with various acids and incorporated into packaging films for processed meats and seafood, as well as combined with nisin and coated onto the surfaces of paper for inhibiting microorganisms (Vartiainen et al., 2004). Durango et al. (2006) also developed and evaluated an edible film made from 3% or 5% chitosan and yam starch against S. enteritidis in suspensions. "
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