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All-cellulose nanocomposite fibers produced by melt spinning cellulose acetate butyrate and cellulose nanocrystals
University of Borås, School of Engineering. (Polymer Group)
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2014 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 21, no 4, 2665-2678 p.Article in journal (Refereed)
Abstract [en]

Bio-based continuous fibers were prepared by melt spinning cellulose acetate butyrate (CAB), cellulose nanocrystals (CNC) and triethyl citrate. A CNC organo-gel dispersion technique was used and the prepared materials (2 and 10 wt% CNC) were melt spun using a twin-screw micro-compounder and drawn to a ratio of 1.5. The microscopy studies showed that the addition of CNC in CAB resulted in defect-free and smooth fiber surfaces. An addition of 10 wt% CNC enhanced the storage modulus and increased the tensile strength and Young’s modulus. Fiber drawing improved the mechanical properties further. In addition, a micromechanical model of the composite material was used to estimate the stiffness and showed that theoretical values were exceeded for the lower concentration of CNC but not reached for the higher concentration. In conclusion, this dispersion technique combined with melt spinning can be used to produce all-cellulose nanocomposites fibers and that both the increase in CNC volume fraction and the fiber drawing increased the mechanical performance.

Place, publisher, year, edition, pages
Kluwer Academic Publishers , 2014. Vol. 21, no 4, 2665-2678 p.
Keyword [en]
Nanocomposite, Cellulose acetate butyrate, Melt spinning, Resursåtervinning
National Category
Polymer Chemistry Paper, Pulp and Fiber Technology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-1955DOI: 10.1007/s10570-014-0269-4Local ID: 2320/14418OAI: oai:DiVA.org:hb-1955DiVA: diva2:870033
Available from: 2015-11-13 Created: 2015-11-13

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Skrifvars, Mikael
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