Adapting wood hydrolysate barriers to high humidity conditions
2014 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 100, 135-142 p.Article in journal (Refereed) Published
The incorporation of layered silicates in bio-based barrier films resulted in lower water vapor permeability, and significantly lowered oxygen permeability at a relative humidity (RH) as high as 80%, with reduced moisture sensitivity of the wood hydrolysate (WH) based films. The applicability of WH based films was accordingly extended over a wider relative humidity condition range. Crude aqueous process liquor, the WH, was extracted from hardwood and utilized as a feed-stock for films without any upgrading pretreatment, yet producing superior oxygen barrier performance compared to partially upgraded WH and highly purified hemicelluloses. Films composed of crude WH and either one of two types of naturally occurring layered silicates, montmorillonite (MMT) or talc, as mineral additives, were evaluated with respect to oxygen and water vapor permeability, morphological, tensile and dynamic thermo-mechanical properties. Films with an oxygen permeability as low as 1.5 (cm(3) mu m)/(m(2) day kPa) at 80% RH was achieved.
Place, publisher, year, edition, pages
2014. Vol. 100, 135-142 p.
Wood hydrolysate, Xylan, Layered silicates, Oxygen barrier, Packaging, Film, Coating
IdentifiersURN: urn:nbn:se:kth:diva-141292DOI: 10.1016/j.carbpol.2012.10.079ISI: 000330092000018ScopusID: 2-s2.0-84887451535OAI: oai:DiVA.org:kth-141292DiVA: diva2:696208
QC 201402132014-02-132014-02-132015-04-14Bibliographically approved