Novel biorefinery: A residue from wood bioethanol production converted into cellulose nanocrystals
2010 (English)In: International Conference on Nanotechnology for the Forest Products Industry 2010: Otaniemi, Espoo, Finland, 27-29 September 2010, Norcross, GA: TAPPI Press, 2010, 1241-1266 p.Conference paper (Refereed)
The aim of the work was to use an industrial bio-residue as a raw material for the production of cellulose nanocrystals. The used residue, obtained from a bioethanol pilot plant, was purified using chemical extraction and whitening, and separated to nanocrystals by mechanical and chemical treatments such as ultrasonication, high-pressure homogenization and hydrolization. The chemical compositions and characteristics of the bio-residue were studied before and after purification using a TAPPI standard, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The morphology of the isolated nanocrystals was characterized using atomic force microscope (AFM). The chemical composition of the used bio-residue was found to be 49.5 wt-% cellulose, 42.1 wt-% lignin and 8.4 wt-% extractives. The crystallinity of the bio-residue was 14.5% and it increased to more than 73% after the purification process. The AFM study showed that a simple ultrasonication and homogenization processes resulted in nanosized crystals with diameters in the 10-20 nm range.
Place, publisher, year, edition, pages
Norcross, GA: TAPPI Press, 2010. 1241-1266 p.
Research subject Wood and Bionanocomposites
IdentifiersURN: urn:nbn:se:ltu:diva-34120Local ID: 83b33b83-8b85-4c7c-8842-fb4fcd86f72fISBN: 9781618390011OAI: oai:DiVA.org:ltu-34120DiVA: diva2:1007370
International Conference on Nanotechnology for the Forest Products Industry : 27/09/2010 - 29/09/2010
Godkänd; 2011; 20110927 (andbra)2016-09-302016-09-30Bibliographically approved