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Polylactide Foams Reinforced with Wood Fibers or Microfibrillated Cellulose
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
2010 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The growing environmental awareness of pollution and climate change has set up newrules and regulations, which forces the industries to seek and satisfy the demand formore alternative and renewable products. Research has been launched for findingnovel lightweight materials for packaging, transportation and construction. Currently,there is an interest of finding new applications of new forms of cellulose since theyoffer low density and cost, renewability and biodegradability. The potential of usingnano-scale cellulose as reinforcement in novel forms of composite materials opens upa fairly new unresearched area.The primary goal with this project is to produce foams by composite materials. This isa part of the large scale European collaboration project SustainComp, which aims todevelop more "green" materials. A manufacturing process similar to papermaking isused to make completely renewable and biodegradable materials.In this study, a repeatable manufacturing method for foaming of wood fiber (WF) andmicrofibrillated cellulose (MFC) reinforced polylactide (PLA) composites was studiedand tailored to produce thermally adapted pre-forms with an uniform dispersion. Amanufacturing process based on a wet commingling technique, was used to preparethe pre forms with a significant drying step to avoid material degradation in thesubsequent melting and pressing steps. Furthermore, various characterizations werecarried out to get a more detailed understanding of the materials.The future looks promising for these types of novel materials, using this newtechnique of manufacturing pre-forms. However, it requires more studies to ensurethat there is a possibility of making foams of PLA pre-forms reinforced with MFC aswith the case for WF reinforced composites.

Place, publisher, year, edition, pages
2010. , p. 62
Series
UPTEC Q, ISSN 1401-5773 ; 10 010
Identifiers
URN: urn:nbn:se:uu:diva-140087OAI: oai:DiVA.org:uu-140087DiVA, id: diva2:382911
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-01-03 Created: 2011-01-03 Last updated: 2011-01-03Bibliographically approved

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