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Mechanical properties of transparent high strength biocomposites from delignified wood veneer
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics, Solid Mechanics. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0003-2566-5271
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Biocomposites. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0001-6017-1774
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center BiMaC Innovation. KTH, School of Chemical Science and Engineering (CHE), Centres, Biofibre Materials Centre, BiMaC.ORCID iD: 0000-0001-8699-7910
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center BiMaC Innovation. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Biocomposites. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0001-5818-2378
2020 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840Article in journal (Refereed) Published
Abstract [en]

Transparent wood (TW) based on delignified birch veneer and thermoplastic poly(methyl methacrylate) (PMMA) is investigated by uniaxial tensile tests and full-field strain analyses based on digital image correlation techniques. TW is considered as a composite of unidirectional fibers (wood veneer) in a matrix (PMMA). Four in-plane elastic constants along the material axes are reported to enable the usage of continuum mechanics and lamination theory. Longitudinal composite strength is as high as 270 MPa at a reinforcement content of only 25 vol%. The failure behavior is interpreted based on strain field development. Strong reinforcement effects were observed from delignified birch veneer. Despite the fragility of delignified veneers, this constituent provides unexpectedly high reinforcement due to the high cellulose content and favorable stress transfer mechanisms.

Place, publisher, year, edition, pages
2020.
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Composite Science and Engineering
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URN: urn:nbn:se:kth:diva-273255DOI: 10.1016/j.compositesa.2020.105853ISI: 000528198000004Scopus ID: 2-s2.0-85080888979OAI: oai:DiVA.org:kth-273255DiVA, id: diva2:1429697
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QC 20200518

Available from: 2020-05-12 Created: 2020-05-12 Last updated: 2020-05-18Bibliographically approved

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Jungstedt, ErikMontanari, CelineÖstlund, SörenBerglund, Lars
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Wallenberg Wood Science CenterSolid MechanicsFibre- and Polymer TechnologyBiocompositesVinnExcellence Center BiMaC InnovationBiofibre Materials Centre, BiMaC
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Composites. Part A, Applied science and manufacturing
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