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New Materials from Renewable Resources
KTH, School of Chemical Science and Engineering (CHE).
2012 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Films and coatings from wood hydrolysate (first-step spent liquor from sulphite cracking process of softwood) were produced. The wood hydrolysate went through two separate recovery processes to be rich in macromolecules and aiming for improvements in their performance with respect to tensile and oxygen permeability properties. Characterization methods were done on the crude and upgraded wood hydrolysates to monitor the outcome and the effect of upgrading processes on the material. Resulting samples from hydrolysates were each mixed with Carboxymethyl Cellulose (CMC) as the co-component and in different compositions. The wood hydrolysate in its crude format mixed with CMC had the capability to fulfill the requirements in need for food packaging, their results were comparable to films and coatings from upgraded wood hydrolysate and better performance in many cases with giving a good and uniform coverage in the coatings, shiny and smooth free-standing films, relatively low and comparable oxygen permeability values both in coatings and free-standing films and acceptable mechanical performance in terms of tensile properties.

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Engineering and Technology
URN: urn:nbn:se:kth:diva-147518OAI: diva2:730219
Available from: 2014-06-27 Created: 2014-06-27 Last updated: 2014-06-27Bibliographically approved

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