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Advanced three-dimensional paper structures: Mechanical characterization and forming of sheets made from modified cellulose fibers
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.). KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center BiMaC Innovation.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center BiMaC Innovation.
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.). KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center BiMaC Innovation.ORCID iD: 0000-0001-8699-7910
2017 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 128, 231-240 p.Article in journal (Refereed) Published
Abstract [en]

Cellulose partially converted to dialcohol cellulose has been identified as a potential breakthrough material for the production of bio-based, complex, double-curved surfaces due to its extensive strain-at-break characteristics (reaching as great as 80% in tensile loading). Tensile testing of handsheets made from modified cellulose fibers was conducted from 50 to 90% relative humidity (RH) and from 23 to 150 °C. Strain-at-break of the handsheets ranged from 35 to 80% over this humidity and temperature range, which is significantly greater than typical cellulose-based materials. The combined effect of moisture and temperature was further investigated by dynamic mechanical thermal analysis, which was utilized to determine the glass-transition temperature of the handsheets as a function of relative humidity. Based on the tensile test results and verified by the three-dimensional (3-D) forming and simulation, a forming limit diagram (strain-based failure surface which describes and illustrates the formability of the material) for the handsheets was generated. This forming limit illustrates significant extent to which this bio-based material can be 3-D formed into advanced structures. Furthermore, temperature was identified as the best, quickest, and most controllable method of improving extensibility of this material during 3-D forming.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 128, 231-240 p.
Keyword [en]
3-D forming, Dialcohol cellulose, Explicit FEM, Formability, Forming limit diagram (FLD), Glass-transition temperature
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-209503DOI: 10.1016/j.matdes.2017.05.002Scopus ID: 2-s2.0-85019623402OAI: oai:DiVA.org:kth-209503DiVA: diva2:1112977
Funder
VINNOVA
Note

QC 20170621

Available from: 2017-06-21 Created: 2017-06-21 Last updated: 2017-06-21Bibliographically approved

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