Spruce milled wood lignin : Linear, branched or cross-linked?

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorBalakshin, Mikhailen_US
dc.contributor.authorCapanema, Ewellyn Augstenen_US
dc.contributor.authorZhu, Xuhaien_US
dc.contributor.authorSulaeva, Irinaen_US
dc.contributor.authorPotthast, Antjeen_US
dc.contributor.authorRosenau, Thomasen_US
dc.contributor.authorRojas, Orlando J.en_US
dc.contributor.departmentDepartment of Bioproducts and Biosystemsen_US
dc.contributor.departmentRISE Bioeconomyen_US
dc.contributor.departmentBiohybrid Materialsen_US
dc.contributor.departmentUniversity of Natural Resources and Life Sciencesen_US
dc.date.accessioned2020-08-06T12:12:32Z
dc.date.available2020-08-06T12:12:32Z
dc.date.issued2020-07-07en_US
dc.description.abstractThe subject of lignin structure, critical for fundamental and practical reasons, is addressed in this study that includes a review of the methods applied to elucidate macromolecular branching. The recently available approaches for determination of the absolute molecular mass of spruce milled wood lignin (MWL) along with the quantification of terminal groups clearly indicate that MWL is significantly branched and cross-linked (with ∼36% lignin units partaking in these linkages). Results from independent methods imply that about half of the branching and crosslinking linkages involve aromatic rings, predominantly 5-5′ etherified units; meanwhile, a significant number of linkages are located in the side chains. Quantitative 13C NMR analyses suggest that the branches involve different aliphatic ether (alkyl-O-alkyl) types at the α- and γ-positions of the side chain, with intact β-O-4 linkages. While the exact structures of these moieties require further investigation, our results point to the fact that conventional lignification theory disagrees with the presence of such key moieties in softwood MWL and the observed high degree of branching/crosslinking. Potential reasons for the noted discrepancies are discussed. This journal isen
dc.description.versionPeer revieweden
dc.format.extent17
dc.format.extent3985-4001
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationBalakshin , M , Capanema , E A , Zhu , X , Sulaeva , I , Potthast , A , Rosenau , T & Rojas , O J 2020 , ' Spruce milled wood lignin : Linear, branched or cross-linked? ' , Green Chemistry , vol. 22 , no. 13 , pp. 3985-4001 . https://doi.org/10.1039/d0gc00926aen
dc.identifier.doi10.1039/d0gc00926aen_US
dc.identifier.issn1463-9262
dc.identifier.otherPURE UUID: 273701a5-6dc9-4862-a174-9bbb473e3b41en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/273701a5-6dc9-4862-a174-9bbb473e3b41en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85087700987&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/44637273/d0gc00926a.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/45492
dc.identifier.urnURN:NBN:fi:aalto-202008064451
dc.language.isoenen
dc.publisherROYAL SOC CHEMISTRY
dc.relation.ispartofseriesGreen Chemistryen
dc.relation.ispartofseriesVolume 22, issue 13en
dc.rightsopenAccessen
dc.titleSpruce milled wood lignin : Linear, branched or cross-linked?en
dc.typeA2 Katsausartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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