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Structural features of mildly fractionated lignin carbohydrate complexes (LCC) from spruce
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. Wallenberg Wood Science Center.ORCID iD: 0000-0003-4266-0720
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. Wallenberg Wood Science Center.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. Wallenberg Wood Science Center. (Wallenberg Wood Science Center)ORCID iD: 0000-0002-8614-6291
2016 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 6, no 48, 42120-42131 p.Article in journal (Refereed) Published
Abstract [en]

A protocol for the quantitative fractionation of lignin carbohydrate complexes (LCC) from wood under mild conditions has been developed. All operations occur at near-neutral pH conditions and low temperatures, in order to preserve the native structure. The protocol also achieved the fractionation of hemicelluloses of relatively high purity enabling for the first time estimates of hemicelluloses fractions not chemically bound to lignin in wood. 2D HSQC NMR was applied to decipher the structure of LCCs and was complemented by thioacidolysis-GC MS techniques. The carbohydrates linked to lignin in LCC are hemicelluloses, mainly arabinoglucuronoxylan (AGX) and galactoglucomannan (GGM). Benzylether (BE) and phenyl glycosidic (PG) linkages were detected. Significant structural differences in the lignin part of LCCs are also reported. The novelty of this work is that we report the first quantitative pH neutral protocol for LCC fractionation and detailed chemical analyses unveil important structural differences of relevance to fundamental knowledge in lignin polymerization and wood-based biorefineries.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2016. Vol. 6, no 48, 42120-42131 p.
Keyword [en]
lignin carbohydrate complexes (LCC), spruce, 2D HSQC, mild protocol
National Category
Wood Science
Research subject
Fibre and Polymer Science
Identifiers
URN: urn:nbn:se:kth:diva-187681DOI: 10.1039/c6ra02399aISI: 000375445500055Scopus ID: 2-s2.0-84966331045OAI: oai:DiVA.org:kth-187681DiVA: diva2:931089
Funder
Knut and Alice Wallenberg Foundation
Note

QC 20160530

Available from: 2016-05-26 Created: 2016-05-26 Last updated: 2017-11-30Bibliographically approved

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Giummarella, Nicola

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