Cellulose-nanofiber/polygalacturonic acid coatings with high oxygen barrier and targeted release properties

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Cellulose-nanofiber/polygalacturonic acid coatings with high oxygen barrier and targeted release properties

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Publication Article, peer reviewed scientific
Title Cellulose-nanofiber/polygalacturonic acid coatings with high oxygen barrier and targeted release properties
Author(s) Mølgaard, Susanne ; Henriksson, Marielle ; Cárdenas, Marité ; Svagan, Anna
Date 2014
English abstract
A bio-inspired coating consisting of pectin (polygalacturonic acid) and cationic cellulose nanofibers were successfully produced by the layer-by-layer method. The build-up and the morphology of the resulting coatings were studied with spectroscopic ellipsometry and atomic force microscopy, respectively. The coating was able to survive the exposure of a simulated gastric fluid, but was partially degraded upon exposure to pectinase enzyme, which simulate the action of the microbial symbionts present in the human colon. Prior to exposure, the oxygen permeability coefficient of the coating (0.033 ml (STP) mm m−2 day−1 atm−1 at 23 °C and 20% RH) was in the same order of magnitude as for ethylene vinyl alcohol films (0.001–0.01 ml (STP) mm m−2 day−1 atm−1). However, after exposure to the mimicked gastrointestinal (GI) tract conditions, the contribution of coating to the overall barrier properties was not measurable.
DOI http://dx.doi.org/10.1016/j.carbpol.2014.08.011 (link to publisher's fulltext)
Publisher Elsevier
Host/Issue Carbohydrate Polymers;
Volume 114
ISSN 0144-8617
Pages 179-182
Language eng (iso)
Subject(s) Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/17827 (link to this page)

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