Application of chitosan emulsion as a coating on Kraft paper

Application of chitosan emulsion as a coating on Kraft paper

Author Reis, Arlete B. Google Scholar
Yoshida, Cristiana M. P. Autor UNIFESP Google Scholar
Reis, Ana Paula C. Google Scholar
Franco, Telma T. Google Scholar
Institution Universidade Estadual de Campinas (UNICAMP)
Fed Univ Vale Jequitinhonha & Mucuri
Universidade Federal de São Paulo (UNIFESP)
Packaging Technol Ctr
Abstract Kraft paper was coated with chitosan emulsion film. the novelty of this paper is the formation of a packaging bilayer system in only one drying step, which combines a biodegradable polymer emulsion (chitosan and palmitic acid) with Kraft paper. This system is described in detail and characterized for barrier properties (water vapor permeability rate (WVPR), air permeability and water absorption capacity (Cobb test)), mechanical properties (tensile properties, Taber stiffness and tear strength) and structural properties. the application of chitosan coating (3.5 gm(-2), wet basis) on Kraft paper sheets provides a significantly lower WVPR (by ca 43%) and water absorption capacity (by ca 35%) as compared to uncoated Kraft paper. the incorporation of palmitic acid into the chitosan film solutions at 1.8 gm(-2) improves the properties of Kraft paper even more by further reducing the WVPR and water absorption capacity by 51 and 41%, respectively. the air resistance of the coated Kraft systems is lower by 8- and 11-fold compared to uncoated Kraft paper, which could be associated with the chitosan film acting as a gas barrier and as a coating agent that fills the pores between cellulose fibers. (C) 2011 Society of Chemical Industry
Keywords chitosan emulsion
Kraft paper
coating
mechanical properties
moisture barrier
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Alpha POLYLIFE
Date 2011-06-01
Published in Polymer International. Malden: Wiley-Blackwell, v. 60, n. 6, p. 963-969, 2011.
ISSN 0959-8103 (Sherpa/Romeo, impact factor)
Publisher Wiley-Blackwell
Extent 963-969
Origin http://dx.doi.org/10.1002/pi.3023
Access rights Closed access
Type Article
Web of Science ID WOS:000291062100016
URI http://repositorio.unifesp.br/handle/11600/33735

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