Novel biorefinery [Elektronisk resurs] A residue from wood bioethanol production converted into cellulose nanocrystals
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Herrera, Martha (författare)
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International Conference on Nanotechnology for the Forest Products Industry : 27/09/2010 - 29/09/2010
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Jackson-Etang, Ayuk (författare)
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Oksman, Kristiina (författare)
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Luleå tekniska universitet Institutionen för teknikvetenskap och matematik (utgivare)
- Norcross, GA TAPPI Press 2010
- Engelska.
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Ingår i: International Conference on Nanotechnology for the Forest Products Industry 2010. ; 1241-1266
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- 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.
Ämnesord
- Engineering and Technology (hsv)
- Industrial Biotechnology (hsv)
- Bio Materials (hsv)
- Teknik och teknologier (hsv)
- Industriell bioteknik (hsv)
- Biomaterial (hsv)
- Trä och bionanokompositer (ltu)
- Wood and Bionanocomposites (ltu)
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