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Mechanical properties of cellulose nanofiber (CNF) reinforced polylactic acid (PLA) prepared by twin screw extrusion
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
University Putra Malaysia.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
2010 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 70, no 12, p. 1742-1747Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to develop cellulose nanofiber (CNF) reinforced polylactic acid (PLA) by twin screw extrusion. Nanocomposites were prepared by premixing a master batch with high concentration of CNFs in PLA and diluting to final concentrations (1, 3, 5 wt%) during the extrusion. Morphology, mechanical and dynamic mechanical properties (DMA) were studied theoretically and experimentally to see how different CNF concentrations affected the composites' properties. The tensile modulus and strength increased from 2.9 GPa to 3.6 GPa and from 58 MPa to 71 MPa, respectively, for nanocomposites with 5 wt% CNF. The DMA results were also positive; the storage modulus increased for all nanocomposites compared to PLA; being more significant in the high temperature region (70°C). The addition of nanofibers shifted the tan delta peak towards higher temperatures. The tan delta peak of the PLA shifted from 70°C to 76°C for composites with 5 wt% CNF.

Place, publisher, year, edition, pages
2010. Vol. 70, no 12, p. 1742-1747
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-13972DOI: 10.1016/j.compscitech.2010.07.005ISI: 000281998000010Scopus ID: 2-s2.0-77955843061Local ID: d4a6ab30-9109-11df-8806-000ea68e967bOAI: oai:DiVA.org:ltu-13972DiVA, id: diva2:986925
Note
Validerad; 2010; 20100716 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Jonoobi, MehdiMathew, Aji P.Oksman, Kristiina

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