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

Author:

Jari Vartiainen   Rose Motion   Heikki Kulonen   Marjaana R?tt?   Eija Skytt?   Raija Ahvenainen  

Journal:

Journal of Applied Polymer Science

Issue Date:

2004

Abstract(summary):

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 cm 3/m 2 d was obtained when 6.9 g/m 2 chitosan was applied to 80 g/m 2 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

Page:

986-993