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All-cellulose composites based on wet-spun cellulose fibers reinforced with cellulose nanocrystals and halloysite nanoclay
Luleå University of Technology. Fiber and Particle Engineering, University of Oulu, Finland.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-6702-4627
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Fiber and Particle Engineering, University of Oulu, Finland.ORCID iD: 0000-0003-4762-2854
2017 (English)In: ICCM21 Proceedings, ICCM, International Committee on Composite Materials , 2017, article id 3751Conference paper, Published paper (Refereed)
Abstract [en]

The aim of the study was to develop biobased and lightweight composites with unidirectional cellulose fibers without a matrix polymer, so called all-cellulose composites with excellent mechanical properties. Continuous cellulose fibers are currently gaining interest for composite applications and if these fibers can be welded together without using a polymer resin it would result in an environmental friendly composite material. The regenerated fibers were prepared using wet spinning of DMAc/LiCl dissolved cellulose where cellulose nanocrystals (CNC) and halloysitenanotubes (HNT) were used as reinforcements. The loading of the nanomaterials into the dissolved cellulose was between 2 to 20 %. The preliminary results showed that the addition of both CNC and HNT improved the mechanical properties of the regenerated cellulose fibers. It was also seen that low concentration of the nanomaterials was more effective reinforcement than high concentration. Also, the HNT showed slightly better improvement compared to the CNC). The spun nanocomposite fibers were directly wound to a roll after the wet spinning, compression molded to compositesheet and dried. The all-cellulose composites mechanical properties as well as microstructure including nanomaterials orientation in the spun fibers were studied and composites mechanical properties are compared with theoretical models. 

Place, publisher, year, edition, pages
ICCM, International Committee on Composite Materials , 2017. article id 3751
Keywords [en]
spun cellulose nanocomposite fibers, cellulose nanocrystals, halloysite nanotubes, allcellulose composites, mechanical properties, microstructure
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-72441OAI: oai:DiVA.org:ltu-72441DiVA, id: diva2:1275045
Conference
21st International Conference on Composites Materials, August 20-25, 2017, Xi’an, China
Available from: 2019-01-04 Created: 2019-01-04 Last updated: 2019-01-04Bibliographically approved

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Hooshmand, SalehOksman, Kristiina

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