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Improving the thermal stability of different types of xylan by acetylation
KTH, Royal Inst Technol, Dept Fibre & Polymer Technol, SE-10044 Stockholm, Sweden.;KTH, Royal Inst Technol, Dept Fibre & Polymer Technol, Wallenberg Wood Sci Ctr, SE-10044 Stockholm, Sweden.;Univ Helsinki, Dept Food & Nutr, FI-00014 Helsinki, Finland..
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0003-0277-2269
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0002-2900-4713
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2019 (engelsk)Inngår i: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 220, s. 132-140Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The impact of various degrees of acetylation on improving the thermal stability of xylan isolated from different botanical source has been studied; methylglucuronoxylan from birch and eucalyptus, arabinoglucuronoxylan from spruce and glucuronoarabinoxylan from sugarcane bagasse and straw. The lower molecular weight of nonacetylated methylglucuronoxylan (17.7-23.7 kDa) and arabinoglucuronoxylan (16.8 kDa) meant that they were more soluble in water than glucuronoarabinoxylan (43.0-47.0 kDa). The temperature at the onset of degradation increased by 17-61 degrees C and by 75-145 degrees C for low and high acetylated xylans respectively, as a result of acetylation. A glass transition temperature in the range of 121-132 degrees C was observed for the samples non-acetylated and acetylated at low degree of acetylation (0.0-0.6). The acetylation to higher degrees (1.4-1.8) increased the glass transition temperature of the samples to 189-206 degrees C. Acetylation proved to be an efficient method for functionalization of the xylan to increase the thermal stability.

sted, utgiver, år, opplag, sider
ELSEVIER SCI LTD , 2019. Vol. 220, s. 132-140
Emneord [en]
Acetylation, Hardwood, Molecular weight, Softwood, Sugarcane residues
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Identifikatorer
URN: urn:nbn:se:kth:diva-270843DOI: 10.1016/j.carbpol.2019.05.063ISI: 000470825500016PubMedID: 31196532Scopus ID: 2-s2.0-85066119415OAI: oai:DiVA.org:kth-270843DiVA, id: diva2:1414740
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Tilgjengelig fra: 2020-03-16 Laget: 2020-03-16 Sist oppdatert: 2020-05-11bibliografisk kontrollert

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Berglund, JennieLindström, MikaelVilaplana, FranciscoSevastyanova, Olena

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