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Mechanical performance and architecture of biocomposite honeycombs and foams from core–shell holocellulose nanofibers
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi. KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center.
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi. KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center. Innventia AB, Sweden.
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Biokompositer. KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center.ORCID-id: 0000-0001-8547-9046
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Biokompositer. KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center.ORCID-id: 0000-0001-5818-2378
2016 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 88, s. 116-122Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

CNFs (cellulose nanofibers) based on holocellulose have a pure cellulose fibril core, with a hemicellulose coating. The diameter is only around 6–8 nm and the hemicellulose surface coating has anionic charge. These CNFs are used to prepare honeycomb and foam structures by freeze-drying from dilute hydrocolloidal suspensions. The materials are compared with materials based on “conventional” cellulose CNFs from sulfite pulp with respect to mechanical properties in compression. Characterization methods include FE-SEM of cellular structure, and the analysis includes comparisons with similar materials from other types of CNFs and data in the literature. The honeycomb structures show superior out-of-plane properties compared with the more isotropic foam structures, as expected. Honeycombs based on holocellulose CNFs showed better properties than sulfite pulp CNF honeycombs, since the cellular structure contained less defects. This is related to better stability of holocellulose CNFs in colloidal suspension.

sted, utgiver, år, opplag, sider
Elsevier, 2016. Vol. 88, s. 116-122
Emneord [en]
Cellulose nanofibers; Holocellulose; Honeycombs; Foams; Nanocomposite; Mechanical properties; Structure
HSV kategori
Forskningsprogram
Teknisk materialvetenskap
Identifikatorer
URN: urn:nbn:se:kth:diva-188834DOI: 10.1016/j.compositesa.2016.05.023ISI: 000380081600014Scopus ID: 2-s2.0-84971667708OAI: oai:DiVA.org:kth-188834DiVA, id: diva2:939693
Forskningsfinansiär
Knut and Alice Wallenberg Foundation
Merknad

QC 20160623

Tilgjengelig fra: 2016-06-20 Laget: 2016-06-20 Sist oppdatert: 2017-11-28bibliografisk kontrollert

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Forlagets fulltekstScopushttp://www.sciencedirect.com/science/article/pii/S1359835X16301567

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Medina, LilianBerglund, Lars

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