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Polylactide latex/nanofibrillated cellulose bionanocomposites of high nanofibrillated cellulose content and nanopaper network structure prepared by a papermaking route
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0001-5818-2378
2012 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 125, no 3, 2460-2466 p.Article in journal (Refereed) Published
Abstract [en]

Previous attempts to use polylactide (PLA) latex particles and nanofibrillated cellulose (NFC) in papermaking processing have been limited to low NFC content. In the present study, a bionanocomposite material was successfully produced using a PLA latex and NFC. The components were mixed using a wet mixing method and bionanocomposite films were made by filtration followed by hot pressing. In composite materials, the dispersion of the reinforcing component in the matrix is critical for the material properties. Biopolymers such as PLA are non-polar and soluble only in organic solvents; NFC is, however, highly hydrophilic. By utilizing latex, i.e., an aqueous dispersion of biopolymer micro-particles, wet mixing is possible and the problem of aggregation of the hydrophilic nanocellulose in organic solvent is avoided. The properties of the resulting NFC/PLA latex bionanocomposite films were analyzed. Thorough blending resulted in good dispersion of the reinforcing component within the matrix. Adding increasing amounts of NFC improved the Young's modulus, tensile strength, and strain at break of the bionanocomposite material. The increase in the tensile properties was linear with increasing NFC content as a result of the good dispersion. The NFC also improved the thermal stability of the bionanocomposite material.

Place, publisher, year, edition, pages
2012. Vol. 125, no 3, 2460-2466 p.
Keyword [en]
biopolymers, mechanical properties, nanocellulose, nanocomposites, polylactide latex
National Category
Chemical Engineering
URN: urn:nbn:se:kth:diva-95482DOI: 10.1002/app.36413ISI: 000302902200092ScopusID: 2-s2.0-84860214846OAI: diva2:528790
QC 20120528Available from: 2012-05-28 Created: 2012-05-28 Last updated: 2012-05-28Bibliographically approved

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Berglund, Lars A.
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Fibre and Polymer TechnologyWallenberg Wood Science Center
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