Innovative Approaches for Converting a Wood Hydrolysate to High-Quality Barrier Coatings
2013 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, Vol. 5, no 16, 7748-7757 p.Article in journal (Refereed) Published
An advanced approach for the efficient and controllable production of softwood hydrolysate-based coatings with excellent oxygen-barrier performance is presented. An innovative conversion of the spray-drying technique into a coating applicator process allowed for a fast and efficient coating process requiring solely aqueous solutions of softwood hydrolysate, even without additives. Compared to analogous coatings prepared by manual application, the spray-drying produced coatings were more homogeneous and smooth, and they adhered more strongly to the substrate. The addition of glyoxal to the aqueous softwood hydrolysate solutions prior to coating formation allowed for hemicellulose cross-linking, which improved both the mechanical integrity and the oxygen-barrier performance of the coatings. A real-time scanning electron microscopy imaging assessment of the tensile deformation of the coatings allowed for a deeper understanding of the ability of the coating layer itself to withstand stress as well as the coating-to-substrate adhesion.
Place, publisher, year, edition, pages
2013. Vol. 5, no 16, 7748-7757 p.
wood hydrolysate, hemicellulose, lignin, spray drying, coatings, real-time SEM, oxygen permeability, food packaging.
IdentifiersURN: urn:nbn:se:kth:diva-122166DOI: 10.1021/am401102hISI: 000323875800017ScopusID: 2-s2.0-84883267826OAI: oai:DiVA.org:kth-122166DiVA: diva2:621146
QC 20131004. Updated from manuscript to article in journal.2013-05-132013-05-132013-10-04Bibliographically approved