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SPRUCE BARK HEMICELLULOSES AND PECTINS: EXTRACTION AND CHARACTERIZATION
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0002-1631-1781
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0003-3858-8324
2011 (English)In: 16TH INTERNATIONAL SYMPOSIUM ON WOOD, FIBER AND PULPING CHEMISTRY, PROCEEDINGS, VOLS I & II / [ed] Wang, L Kuang, S Hou, Q Cao, C Si, CL Zhang, HJ, CHINA LIGHT INDUSTRY PRESS , 2011, p. 103-106Conference paper, Published paper (Refereed)
Abstract [en]

In industrial spruce bark, up to 20 % of the dry mass consists of non-cellulosic polysaccharides. These polysaccharides can easily be extracted with pressurized hot water and have a large potential as a starting polymeric biomass for functional materials development. In this study, spruce bark was collected directly after the debarking process. The different steps of extraction were performed in an Accelerated Solvent Extractor (ASE). Bark was first extracted with acetone at 100 degrees C to remove extractives. Spruce bark polysaccharides could then be extracted with pressurized water at 100-460 degrees C with the highest yield at 140 degrees C. They were mainly composed of glucose, arabinose and galacturonic acid units which revealed the presence of pectic substances, starch and arabinose-rich hemicelluloses, e.g. arabinans. Molecular weight estimations showed the presence of rather large polysaccharides with a Mw varying between 10 to 30 kDa, depending of the extraction conditions.

Place, publisher, year, edition, pages
CHINA LIGHT INDUSTRY PRESS , 2011. p. 103-106
Keywords [en]
bark, hemicelluloses, pectins, biorefinery, Norway spruce
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-243228ISI: 000394407800021Scopus ID: 2-s2.0-84855696710OAI: oai:DiVA.org:kth-243228DiVA, id: diva2:1354512
Conference
16th International Symposium on Wood, Fibre and Pulping Chemistry (ISWFPC),Tianjin, PEOPLES R CHINA,JUN 08-10, 2011
Note

QC 20190925

Available from: 2019-09-25 Created: 2019-09-25 Last updated: 2019-09-25Bibliographically approved

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Edlund, UlricaEk, Monica

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