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Multilayered Alkyd Resin/Nanocellulose Coatings for Use in Renewable Packaging Solutions with a High Level of Moisture Resistance
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik. KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center.
2013 (Engelska)Ingår i: Industrial & Engineering Chemistry Research, ISSN 0888-5885, E-ISSN 1520-5045, Vol. 52, nr 7, s. 2582-2589Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A surprisingly simple and rapid methodology for large-area, lightweight, and thin laminate coatings with remarkable moisture barrier properties is introduced. Commercially available paperboards are coated with thin layers of nanocellulose. The nanocellulose coating induces a surface smoothening effect on the coated sheets as characterized by environmental scanning electron microscopy and white light interferometry. A moisture-protective layer of renewable alkyd resins is deposited on the nanocellulose precoated sheets using a water-borne dispersion coating process or lithographic printing. Through an auto-oxidation process, the applied alkyd resins are transformed into moisture sealant layers. The moisture barrier properties are characterized in detail by water vapor permeability measurements at different levels of relative humidity. The water vapor barrier properties of the nanocellulose precoated substrates were significantly improved by thin layers of renewable alkyd resins. The effect of the alkyd resin properties, coating technologies, and base paper substrates on the final barrier performance of the sheets were studied. It was found that the nanocellulose coating had a notable effect on the homogeneity and barrier performance of the alkyd resin layers and in particular those alkyd resin layers that were applied by printing. The concept is environmentally friendly, energy-efficient, and economic and is ready for scaling-up via continuous roll-to-roll processes. Large-scale renewable coatings applicable for sustainable packaging solutions are foreseen.

Ort, förlag, år, upplaga, sidor
2013. Vol. 52, nr 7, s. 2582-2589
Nyckelord [en]
Native Cellulose Nanofibrils, Microfibrillated Cellulose, Barrier Properties, Films, Transparent, Composites, Surface, Oil
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Identifikatorer
URN: urn:nbn:se:kth:diva-119733DOI: 10.1021/ie301785aISI: 000315326100015Scopus ID: 2-s2.0-84874059619OAI: oai:DiVA.org:kth-119733DiVA, id: diva2:612603
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QC 20130322

Tillgänglig från: 2013-03-22 Skapad: 2013-03-21 Senast uppdaterad: 2017-12-06Bibliografiskt granskad

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Aulin, Christian
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Fiber- och polymerteknikWallenberg Wood Science Center
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