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All cellulose nanocomposites produced by compounding extrusion
Norwegian University of Science and Technology (NTNU), Trondheim.
Norwegian University of Science and Technology (NTNU), Trondheim.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
2007 (English)In: Journal of Biobased Materials and Bioenergy, ISSN 1556-6560, E-ISSN 1556-6579, Vol. 1, no 3, p. 367-371Article in journal (Refereed) Published
Abstract [en]

A transparent biobased nanocomposite of 5 wt% cellulose nanowhiskers (CNW) and cellulose acetate butyrate (CAB), plasticized by triethyl citrate (TEC), was produced by melt extrusion. The cellulose nanowhiskers were prepared from commercially available microcrystalline cellulose (MCC) by hydrochloric acid hydrolysis. The plasticizer, TEC, was solved in the whisker suspension and this suspension was pumped into the extruder during the compounding process. Scanning electron microscopy, tensile testing, and dynamic mechanical thermal analysis were used to study the structure and properties of the nanocomposite. The tensile modulus and strength indicated an improvement with 300% and 100%, respectively, compared to neat CAB but the elongation at break was decreased. Further more, the softening temperature of CAB was extended for the nanocomposite. Results from DMTA showed that the tanδ peak temperature was shifted by 31 °C, from 117 °C to 148 °C with addition of CNW in CAB. The extrusion process with liquid feeding was shown to be successful for this material combination. AbstractA transparent biobased nanocomposite of 5 wt% cellulose nanowhiskers (CNW) and cellulose acetate butyrate (CAB), plasticized by triethyl citrate (TEC), was produced by extrusion compounding. The cellulose nanowhiskers were prepared from commercially available microcrystalline cellulose (MCC) by hydrochloric acid hydrolysis. The plasticizer, TEC, was solved in the whisker suspension and this suspension was pumped into the extruder during the compounding process. Scanning electron microscopy, tensile testing, and dynamic mechanical thermal analysis were used to study the structure and properties of the nanocomposite. The tensile modulus and strength were improved with 300% and 100%, respectively, compared to neat CAB but the elongation at break was decreased. Further more, the softening temperature of CAB was extended for the nanocomposite. Results from DMTA showed that the tan d peak temperature was shifted by 31 ˚C, from 117 °C to 148 ˚C with addition of CNW in CAB.

Abstract [en]

A transparent biobased nanocomposite of 5 wt% cellulose nanowhiskers (CNW) and cellulose acetate butyrate (CAB), plasticized by triethyl citrate (TEC), was produced by melt extrusion. The cellulose nanowhiskers were prepared from commercially available microcrystalline cellulose (MCC) by hydrochloric acid hydrolysis. The plasticizer, TEC, was solved in the whisker suspension and this suspension was pumped into the extruder during the compounding process. Scanning electron microscopy, tensile testing, and dynamic mechanical thermal analysis were used to study the structure and properties of the nanocomposite. The tensile modulus and strength indicated an improvement with 300% and 100%, respectively, compared to neat CAB but the elongation at break was decreased. Further more, the softening temperature of CAB was extended for the nanocomposite. Results from DMTA showed that the tanδ peak temperature was shifted by 31 °C, from 117 °C to 148 °C with addition of CNW in CAB. The extrusion process with liquid feeding was shown to be successful for this material combination.

Place, publisher, year, edition, pages
2007. Vol. 1, no 3, p. 367-371
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-10400DOI: 10.1166/jbmb.2007.011ISI: 000253340000009Local ID: 9347e1f0-4a6b-11dc-a369-000ea68e967bOAI: oai:DiVA.org:ltu-10400DiVA, id: diva2:983345
Note
Validerad; 2007; 20070814 (krioks)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Oksman, Kristiina

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