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Preparation and Viscoelastic Properties of Composite Fibres Containing Cellulose Nanofibrils: Formation of a Coherent Fibrillar Network
Chalmers University of Technology, Sweden.
KTH, School of Biotechnology (BIO), Glycoscience. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. Chalmers University of Technology, Sweden.
2016 (English)In: Journal of Nanomaterials, ISSN 1687-4110, E-ISSN 1687-4129, Vol. 2016, 9569236Article in journal (Refereed) Published
Abstract [en]

Composite fibres with a matrix of poly(ethylene glycol) (PEG) and cellulose nanofibrils (CNF) as reinforcing elements were produced using a capillary viscometer. Two types of CNF were employed: one based on carboxymethylated pulp fibres and the other on TEMPO-oxidized pulp. Part of the latter nanofibrils was also grafted with PEG in order to improve the compatibility between the CNF and the PEG matrix. The nominal CNF-content was kept at 10 or 30 weight-%. The composite fibres were characterized by optical and scanning electron microscopy in addition to dynamic mechanical thermal analysis (DMTA). Evaluation of the storage modulus indicated a clear reinforcing effect of the CNF, more pronounced in the case of the grafted CNF and depending on the amount of CNF. An interesting feature observed during the DMTA-measurements was that the fibrils within the composite fibres appeared to forma rather coherent and load-bearing network which was evident even after removing of the PEG-phase (by melting). An analysis of the modulus of the composite fibres using a rather simple model indicated that the CNF were more efficient as reinforcing elements at lower concentrations which may be associated with a more pronounced aggregation as the volume fraction of CNF increased.

Place, publisher, year, edition, pages
Hindawi Publishing Corporation, 2016. Vol. 2016, 9569236
Keyword [en]
Cellulose, Dynamic mechanical analysis, Fibers, Grafting (chemical), Nanofibers, Polyethylene oxides, Reinforcement, Scanning electron microscopy, Thermoanalysis, Viscoelasticity, Capillary viscometers, Carboxymethylated, Cellulose nanofibrils, D. dynamic mechanical thermal analyses (DMTA), Fibrillar networks, Reinforcing effects, Reinforcing elements, Viscoelastic properties
National Category
Paper, Pulp and Fiber Technology
URN: urn:nbn:se:kth:diva-191763DOI: 10.1155/2016/9569236ISI: 000380683400001ScopusID: 2-s2.0-84981248748OAI: diva2:973935

QC 20160923

Available from: 2016-09-23 Created: 2016-09-02 Last updated: 2016-09-23Bibliographically approved

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Zhou, QiRigdahl, Mikael
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