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Structure and thermal properties of poly(lactic acid)/cellulose whiskers nanocomposite materials
Norwegian University of Science and Technology (NTNU), Trondheim.
Norwegian University of Science and Technology (NTNU), Trondheim.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
2007 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 67, no 11-12, p. 2535-2544Article in journal (Refereed) Published
Abstract [en]

The goal of this work was to produce nanocomposites based on poly(lactic acid) (PLA) and cellulose nanowhiskers (CNW). The CNW were treated with either tert-butanol or a surfactant in order to find a system that would show flow birefringence in chloroform. The nanocomposites were prepared by incorporating 5 wt% of the different CNW into a PLA matrix using solution casting. Field emission scanning electron microscopy showed that untreated whiskers formed flakes, while tert-butanol treated whiskers formed loose networks during freeze drying. The surfactant treated whiskers showed flow birefringence in chloroform and transmission electron microscopy showed that these whiskers produced a well dispersed nanocomposite. Thermogravimetric analysis indicated that both whiskers and composite materials were thermally stable in the region between 25 C and 220 C. The dynamic mechanical thermal analysis showed that both the untreated and the tert-butanol treated whiskers were able to improve the storage modulus of PLA at higher temperatures and a 20 C shift in the tand peak was recorded for the tert-butanol treated whiskers.

Place, publisher, year, edition, pages
2007. Vol. 67, no 11-12, p. 2535-2544
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-6666DOI: 10.1016/j.compscitech.2006.12.012ISI: 000247984500037Scopus ID: 2-s2.0-34248584534Local ID: 4ed906a0-0ea9-11dc-b9dd-000ea68e967bOAI: oai:DiVA.org:ltu-6666DiVA, id: diva2:979552
Note
Validerad; 2007; 20070530 (krioks)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Oksman, Kristiina

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