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Cellulose-nanofiber/polygalacturonic acid coatings with high oxygen barrier and targeted release properties
University of Copenhagen, Denmark.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad.ORCID iD: 0000-0002-1198-2009
University of Copenhagen, Denmark; Malmö University, Sweden.
University of Copenhagen, Denmark.
2014 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 114, p. 179-182Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2014. Vol. 114, p. 179-182
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-6633DOI: 10.1016/j.carbpol.2014.08.011Scopus ID: 2-s2.0-84906837347Local ID: 16708OAI: oai:DiVA.org:ri-6633DiVA, id: diva2:964472
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-08-08Bibliographically approved

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