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A method for preparing epoxy-cellulose nanofiber composites with an oriented structure
Fibre and Particle Engineering Research Unit, Faculty of Technology, University of Oulu, Oulu, Finland.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap. Fibre and Particle Engineering Research Unit, Faculty of Technology, University of Oulu, Oulu, Finland.Mechanical & Industrial Engineering (MIE), University of Toronto, 5 King’s College Road, Toronto, ON, Canada.ORCID-id: 0000-0003-4762-2854
Fibre and Particle Engineering Research Unit, Faculty of Technology, University of Oulu, Oulu, Finland.
2019 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 125, artikkel-id 105515Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A method was developed for processing cellulose nanocomposites using conventional vacuum infusion. Porouscellulose nanofiber networks were prepared via ice-templating and used as preforms for impregnation with a bioepoxyresin. Microscopy studies showed a unidirectionally oriented micrometer-scale pore structure that facilitatedthe infusion process by providing flow channels for the resin. The permeability of the preforms wascomparable to that of natural fiber mats, and the infusion time significantly decreased after optimizing theprocessing temperature. The flexural modulus of the bio-epoxy increased from 2.5 to 4.4 GPa, the strengthincreased from 89 to 107 MPa, and the storage modulus increased from 2.8 to 4.2 GPa with 13 vol% cellulosenanofibers. The mechanical properties also showed anisotropy, as the flexural and storage moduli were approximately25% higher in the longitudinal direction, indicating that the nanofiber network inside the epoxymatrix had an oriented nature.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 125, artikkel-id 105515
Emneord [en]
Cellulose, Nanocomposites, Mechanical properties, Vacuum infusion
HSV kategori
Forskningsprogram
Trä och bionanokompositer
Identifikatorer
URN: urn:nbn:se:ltu:diva-75412DOI: 10.1016/j.compositesa.2019.105515ISI: 000484878200001Scopus ID: 2-s2.0-85068541264OAI: oai:DiVA.org:ltu-75412DiVA, id: diva2:1340764
Merknad

Validerad;2019;Nivå 2;2019-08-13 (johcin)

Tilgjengelig fra: 2019-08-06 Laget: 2019-08-06 Sist oppdatert: 2019-09-27bibliografisk kontrollert

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