All-cellulose composites via short-fiber dispersion approach using NaOH–water solvent

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-05-30
Major/Subject
Mcode
Degree programme
Language
en
Pages
13
4881-4893
Series
Cellulose, Volume 26, issue 8
Abstract
Abstract: All-cellulose composites were prepared by dispersing short softwood kraft fibers in dissolving pulp-8 wt% NaOH–water. The degree of polymerization of the dissolving pulp used for the matrix and the concentration of reinforcing fibers were varied. Morphology, density, crystallinity, cellulose I content and mechanical properties of the composites were investigated. A special attention was paid on the presence of non-dissolved fibers originating from incomplete dissolution of pulp in 8 wt% NaOH–water thus decreasing the actual concentration of dissolved cellulose in matrix solution. This “lack of matter” induced the formation of pores, which strongly influenced the morphology of composites. Density was shown to be the main parameter contributing to the mechanical properties of the prepared all-cellulose composites. The results demonstrate the complexity of the system and the need in taking into account the dissolution power of the solvent. Graphical abstract: Morphology of all-cellulose composites: matrix is from low-DP dissolving pulp (a) and from high-DP pulp (b).[Figure not available: see fulltext.].
Description
Keywords
All-cellulose composites, Density, Dissolution, Mechanical properties, NaOH
Other note
Citation
Korhonen , O , Sawada , D & Budtova , T 2019 , ' All-cellulose composites via short-fiber dispersion approach using NaOH–water solvent ' , Cellulose , vol. 26 , no. 8 , pp. 4881-4893 . https://doi.org/10.1007/s10570-019-02422-z