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Influence of processing routes on the morphology and properties of polymer/nanofibrillated cellulose composites
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. Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland .
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: 0000-0001-7870-6327
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2014 (English)In: 16th European Conference on Composite Materials, ECCM 2014, 2014Conference paper, Published paper (Refereed)
Abstract [en]

The morphology of polymer/nanofibrillated cellulose (NFC) composite sheets produced using different techniques and its influence on low strain stiffness were assessed by optical and transmission electron microscopy. Solvent processing led to relatively homogeneous NFC dispersions and significant reinforcement of the in-plane Young's modulus. The continuous cellular networks obtained by wet-comingling of PLA powder or latex with NFC also provided efficient and essentially scale-independent reinforcement, in spite of the extensive agglomeration of the NFC. However, the irreversible nature of these networks is incompatible with low pressure thermoplastic processing routes such as physical foaming, and while they may be broken up by e.g. extrusion, this led to substantial loss in reinforcement, particularly above Tg, consistent with the observation of isolated low aspect ratio NFC aggregates in the extruded specimens.

Place, publisher, year, edition, pages
2014.
Keyword [en]
Nanocomposites, Nanofibrillated cellulose, Processing, Transmission electron microscopy, Aspect ratio, Elastic moduli, Light transmission, Morphology, Reinforcement, Cellular network, Cellulose composites, Composite sheets, Low aspect ratio, Physical foaming, Processing Route, Thermoplastic processing, Cellulose
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-167604Scopus ID: 2-s2.0-84915756457ISBN: 9780000000002 (print)OAI: oai:DiVA.org:kth-167604DiVA: diva2:814851
Conference
16th European Conference on Composite Materials, ECCM 2014, 22 June 2014 - 26 June 2014
Note

QC 20150528

Available from: 2015-05-28 Created: 2015-05-22 Last updated: 2015-05-28Bibliographically approved

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Ansari, FarhanBerglund, Lars A.

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Galland, SylvainAnsari, FarhanBerglund, Lars A.
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