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Green and efficient method for preparing all-cellulose composites with NaOH/urea solvent
Particle and Fibre Engineering, University of Oulu, Oulu, Finland.
Particle and Fibre Engineering, University of Oulu, Oulu, Finland; Baden-Wuerttemberg Cooperative State University, Karlsruhe, Germany.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. (FSCN)
Baden-Wuerttemberg Cooperative State University, Karlsruhe, Germany.
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2016 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 135, 153-158 p.Article in journal (Refereed) Published
Abstract [en]

All-cellulose composite (ACC) was made from sulphite dissolving pulp fibres by using a partial dissolution method with sodium hydroxide/urea (NaOH/urea) solvent at a low temperature. The resultant composites were compared with untreated sheets. The effect of dissolution time (2, 30, 60, 120 and 240 s) were monitored by XRD, FESEM and mechanical tests. The initial fibre structure was transformed into a thoroughly consolidated composite material after a 30 s dissolution time, and the tensile strength was 14 times higher than that of the untreated fibre sheet without affecting strain. At the same time the amount of non-crystalline matrix in the ACC increased, and the apparent crystallinity decreased. Dissolution times of longer than 30 s had no or a minor effect on crystallinity and mechanical properties.

Place, publisher, year, edition, pages
2016. Vol. 135, 153-158 p.
Keyword [en]
All-cellulose composite (ACC), Mechanical properties, Polymer-matrix composites (PMCs), Scanning electron microscopy (SEM), Short-fibre composites
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-29170DOI: 10.1016/j.compscitech.2016.09.022ISI: 000386407700019Scopus ID: 2-s2.0-84991641468OAI: oai:DiVA.org:miun-29170DiVA: diva2:1040941
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2016-11-17Bibliographically approved

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