WtF-Nano : One-Pot Dewatering and Water-Free Topochemical Modification of Nanocellulose in Ionic Liquids or gamma-Valerolactone

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dc.contributor.author Laaksonen, Tiina
dc.contributor.author Helminen, Jussi K. J.
dc.contributor.author Lemetti, Laura
dc.contributor.author Långbacka, Jesper
dc.contributor.author del Cerro, Daniel Rico
dc.contributor.author Hummel, Michael
dc.contributor.author Filpponen, Ilari
dc.contributor.author Rantamaki, Antti H.
dc.contributor.author Kakko, Tia
dc.contributor.author Kemell, Marianna L.
dc.contributor.author Wiedmer, Susanne K.
dc.contributor.author Heikkinen, Sami
dc.contributor.author Kilpeläinen, Ilkka
dc.contributor.author King, Alistair W. T.
dc.date.accessioned 2018-01-29T16:55:11Z
dc.date.available 2018-01-29T16:55:11Z
dc.date.issued 2017-12-22
dc.identifier.citation Laaksonen , T , Helminen , J K J , Lemetti , L , Långbacka , J , del Cerro , D R , Hummel , M , Filpponen , I , Rantamaki , A H , Kakko , T , Kemell , M L , Wiedmer , S K , Heikkinen , S , Kilpeläinen , I & King , A W T 2017 , ' WtF-Nano : One-Pot Dewatering and Water-Free Topochemical Modification of Nanocellulose in Ionic Liquids or gamma-Valerolactone ' , ChemSusChem , vol. 10 , no. 24 , pp. 4879-4890 . https://doi.org/10.1002/cssc.201701344
dc.identifier.other PURE: 95008460
dc.identifier.other PURE UUID: 739b4d8e-055d-439d-adba-e9bd1f3809f1
dc.identifier.other WOS: 000418660700013
dc.identifier.other Scopus: 85034957437
dc.identifier.other WOS: 000418660700013
dc.identifier.other ORCID: /0000-0003-3142-9259/work/41139280
dc.identifier.other ORCID: /0000-0002-3583-2064/work/41139684
dc.identifier.other ORCID: /0000-0002-3097-6165/work/41139686
dc.identifier.other ORCID: /0000-0003-3334-9885/work/42608290
dc.identifier.other ORCID: /0000-0001-8490-6069/work/41140506
dc.identifier.other ORCID: /0000-0002-6606-4344/work/41140349
dc.identifier.uri http://hdl.handle.net/10138/231734
dc.description.abstract Ionic liquids are used to dewater a suspension of birch Kraft pulp cellulose nanofibrils (CNF) and as a medium for water-free topochemical modification of the nanocellulose (a process denoted as "WtF-Nano"). Acetylation was applied as a model reaction to investigate the degree of modification and scope of effective ionic liquid structures. Little difference in reactivity was observed when water was removed, after introduction of an ionic liquid or molecular co-solvent. However, the viscoelastic properties of the CNF suspended in two ionic liquids show that the more basic, but non-dissolving ionic liquid, allows for better solvation of the CNF. Vibrio fischeri bacterial tests show that all ionic liquids in this study were harmless. Scanning electron microscopy and wide-angle X-ray scattering on regenerated samples show that the acetylated CNF is still in a fibrillar form. 1D and 2D NMR analyses, after direct dissolution in a novel ionic liquid electrolyte solution, indicate that both cellulose and residual xylan on the surface of the nanofibrils reacts to give acetate esters. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof ChemSusChem
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject acetylation
dc.subject ionic liquids
dc.subject cellulose
dc.subject nanofibers
dc.subject topochemistry
dc.subject NANOFIBRILLATED CELLULOSE
dc.subject CORRELATION SPECTRA
dc.subject NMR-SPECTROSCOPY
dc.subject PULP
dc.subject HOMOGENIZATION
dc.subject DISSOLUTION
dc.subject SUSPENSIONS
dc.subject PARAMETERS
dc.subject OXIDATION
dc.subject FIBER
dc.subject 116 Chemical sciences
dc.title WtF-Nano : One-Pot Dewatering and Water-Free Topochemical Modification of Nanocellulose in Ionic Liquids or gamma-Valerolactone en
dc.type Article
dc.contributor.organization Department of Chemistry
dc.contributor.organization Susanne Wiedmer / Principal Investigator
dc.contributor.organization HUS Head and Neck Center
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1002/cssc.201701344
dc.relation.issn 1864-5631
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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