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http://dx.doi.org/10.20909/kopast.2022.28.2.81

Preparation and Characterization of Sodium Caseinate (CasNa)/Transglutaminase (TG)-coated Papers for Packaging  

Hwang, Jihyeon (Department of Food Processing & Distribution, College of Life Science, Gangneung-Wonju National University)
Kim, Dowan (Department of Food Processing & Distribution, College of Life Science, Gangneung-Wonju National University)
Publication Information
KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY / v.28, no.2, 2022 , pp. 81-87 More about this Journal
Abstract
Paper is a promising alternative to petroleum-based plastic materials for sustainable packaging applications. However, paper exhibits poor gas and water vapor barrier properties, which restrict its effective application in the packaging industry. To enhance the properties of papers, sodium caseinate (CasNa)/transglutaminase (TG) coating solutions with various TG contents were prepared and coated on the papers. The chemical and morphological structures, mechanical properties, seal strength, and water vapor barrier properties of the coated papers were thoroughly investigated. The paper properties depended significantly on the chemical and morphological structures. Pristine CasNa and CasNa/TG coating solutions were evenly coated on the paper surfaces, without any cracks. The chemical structure of the CasNa/TG coated papers was slightly influenced by TG addition, resulting in increased elongation at break and enhanced water barrier properties. To promote the use of CasNa-coated papers in packaging applications, additional investigations must be performed to prevent gas and moisture permeation and enhance the mechanical strength of these papers via chemical reactions and introduction of organic/inorganic composites.
Keywords
Paper based packaging; Sodium caseinate; transglutaminase; coating; physical properties;
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