Papers coated with caseinate and caseinate/chitosan bilayer films were developed. Caseinate, chitosan
and caseinate/chitosan films were preliminary characterized by FTIR spectroscopy and thermal stability
analyses. The effects of coating weight, caseinate concentration (7%, 10%, and 12%, w/w), and coating
application methods (single layer and bilayer) on the physical and mechanical properties of coated papers
were studied. Increasing the concentration of caseinate led to a decrease in water vapor permeability
(WVP) of the resulting coated paper sheets. Chitosan significantly (p < 0.05) increased the elongation at
break (%E) of coated paper. However, the application of chitosan as a second layer on wet or dry caseinate
films did not significantly affect (p > 0.05) the tensile strength (TS) of coated paper. The greatest reduction
in paper WVP is achieved by addition of a chitosan layer to the dried preformed caseinate-coated paper.
Papers coated with caseinate and caseinate/chitosan bilayer films were developed. Caseinate, chitosanand caseinate/chitosan films were preliminary characterized by FTIR spectroscopy and thermal stabilityanalyses. The effects of coating weight, caseinate concentration (7%, 10%, and 12%, w/w), and coatingapplication methods (single layer and bilayer) on the physical and mechanical properties of coated paperswere studied. Increasing the concentration of caseinate led to a decrease in water vapor permeability(WVP) of the resulting coated paper sheets. Chitosan significantly (p < 0.05) increased the elongation atbreak (%E) of coated paper. However, the application of chitosan as a second layer on wet or dry caseinatefilms did not significantly affect (p > 0.05) the tensile strength (TS) of coated paper. The greatest reductionin paper WVP is achieved by addition of a chitosan layer to the dried preformed caseinate-coated paper.
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