Activation of TEMPO by ClO2 for oxidation of cellulose by hypochlorite — Fundamental and practical aspects of the catalytic system

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Pääkkönen, Timo
dc.contributor.author Pönni, Raili
dc.contributor.author Dou, Jinze
dc.contributor.author Nuopponen, Markus
dc.contributor.author Vuorinen, Tapani
dc.date.accessioned 2017-08-03T12:11:04Z
dc.date.available 2017-08-03T12:11:04Z
dc.date.issued 2017-06-30
dc.identifier.citation Pääkkönen , T , Pönni , R , Dou , J , Nuopponen , M & Vuorinen , T 2017 , ' Activation of TEMPO by ClO2 for oxidation of cellulose by hypochlorite — Fundamental and practical aspects of the catalytic system ' Carbohydrate Polymers , vol 174 , pp. 524-530 . DOI: 10.1016/j.carbpol.2017.06.117 en
dc.identifier.issn 0144-8617
dc.identifier.issn 1879-1344
dc.identifier.other PURE UUID: e224b4e8-f890-4cad-ae0d-7dc42da795fa
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/activation-of-tempo-by-clo2-for-oxidation-of-cellulose-by-hypochlorite--fundamental-and-practical-aspects-of-the-catalytic-system(e224b4e8-f890-4cad-ae0d-7dc42da795fa).html
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/20586912/CHEM_P_kk_nen_et_al_Activation_of_TEMPO_2017_Carbohydrate_Polymers.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/27434
dc.description.abstract Bromide-free TEMPO-catalyzed oxidation of the primary alcohols by sodium hypochlorite (NaOCl) does not proceed without a prior activation of the catalyst. Here were demonstrate an immediate in situ activation of the catalyst with an equimolar addition of chlorine dioxide (ClO2) relative to TEMPO. Sodium bromide (NaBr) had a similar role in activating the catalyst although NaBr was needed in excess and the activation took several minutes depending on the dosage of NaBr. The activation method, or the concentration of NaBr, did not affect the bulk oxidation rate. The selectivity of the ClO2 initiated oxidation remained high up to NaOCl addition of 3 mol/kg bleached birch kraft pulp after which additional loss in yield and depolymerization of cellulose were emphasized with negligible increase in carboxylate content. A carboxylate content of 0.8–1 mol/kg, sufficient for easy mechanical fibrillation of the pulp, was achieved under mild conditions with NaOCl addition of 2-2.5 mol/kg pulp. en
dc.format.extent 7
dc.format.extent 524-530
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Carbohydrate Polymers en
dc.relation.ispartofseries Volume 174 en
dc.rights openAccess en
dc.subject.other 215 Chemical engineering en
dc.title Activation of TEMPO by ClO2 for oxidation of cellulose by hypochlorite — Fundamental and practical aspects of the catalytic system en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Materials Chemistry of Cellulose
dc.contributor.department Department of Bioproducts and Biosystems
dc.contributor.department UPM
dc.subject.keyword Birch, pulp, Cellulose, Carboxylates, Bromide-free, ClO2 activated TEMPO-mediated oxidation, UV–vis spectrometry
dc.subject.keyword 215 Chemical engineering
dc.identifier.urn URN:NBN:fi:aalto-201708036402
dc.identifier.doi 10.1016/j.carbpol.2017.06.117
dc.date.embargo info:eu-repo/date/embargoEnd/2018-07-01


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