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Dissolution state of cellulose in aqueous systems. 2. Acidic solvents

2016-10Journal article Restricted access
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dc.contributor.authorAlves, Luis
dc.contributor.authorMedronho, Bruno
dc.contributor.authorAntunes, Filipe E.
dc.contributor.authorTopgaard, Daniel
dc.contributor.authorLindman, Bjorn
dc.date.accessioned2017-04-07T15:55:51Z
dc.date.available2017-04-07T15:55:51Z
dc.date.issued2016-10
dc.description.abstractCellulose is insoluble in water but can be dissolved in strong acidic or alkaline conditions. How well dissolved cellulose is in solution and how it organizes are key questions often neglected in literature. The typical low pH required for dissolving cellulose in acidic solvents limits the use of typical characterization techniques. In this respect, Polarization Transfer Solid State NMR (PT ssNMR) emerges as a reliable alternative. In this work, combining PT ssNMR, microscopic techniques and X-ray diffraction, a set of different acidic systems (phosphoric acid/water, sulfuric acid/glycerol and zinc chloride/water) is investigated. The studied solvent systems are capable to efficiently dissolve cellulose, although degradation occurs to some extent. PT ssNMR is capable to identify the liquid and solid fractions of cellulose, the degradation products and it is also sensitive to gelation. The materials regenerated from the acidic dopes were found to be highly sensitive to the solvent system and to the presence of amphiphilic additives in solution. (C) 2016 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.carbpol.2016.06.015
dc.identifier.issn0144-8617
dc.identifier.urihttp://hdl.handle.net/10400.1/9241
dc.language.isoeng
dc.peerreviewedyes
dc.relationEFFICIENT LOW-COST GELS OF CROSS-LINKED POLYELECTROLYTES OR CELLULOSE
dc.relation.isbasedonWOS:000380943900081
dc.titleDissolution state of cellulose in aqueous systems. 2. Acidic solvents
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleEFFICIENT LOW-COST GELS OF CROSS-LINKED POLYELECTROLYTES OR CELLULOSE
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F80556%2F2011/PT
oaire.citation.endPage715
oaire.citation.startPage707
oaire.citation.titleCarbohydrate Polymers
oaire.citation.volume151
person.familyNameMedronho
person.givenNameBruno
person.identifier.ciencia-id6918-9AB3-8D22
person.identifier.orcid0000-0003-0972-1739
person.identifier.ridP-5927-2014
person.identifier.scopus-author-id9940656700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication4c03571a-93da-4504-8acf-c74326449852
relation.isAuthorOfPublication.latestForDiscovery4c03571a-93da-4504-8acf-c74326449852
relation.isProjectOfPublication10dff2c2-67db-4248-9ac8-d8b653f5b3ec
relation.isProjectOfPublication.latestForDiscovery10dff2c2-67db-4248-9ac8-d8b653f5b3ec

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