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Sulfonated Cellulose Membranes: Physicochemical Properties and Ionic Transport versus Degree of Sulfonation
Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping, SE-601 74, Sweden; BillerudKorsnäs Gruvön, Grums, SE-664 33, Sweden.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.ORCID iD: 0000-0003-1874-2187
Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping, SE-601 74, Sweden.
Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping, SE-601 74, Sweden.
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2022 (English)In: Advanced Sustainable Systems, E-ISSN 2366-7486, Vol. 6, no 11, article id 2200275Article in journal (Refereed) Published
Abstract [en]

The next generation of green ion selective membranes is foreseen to be based on cellulosic nanomaterials with controllable properties. The introduction of ionic groups into the cellulose structure via chemical modification is one strategy to obtain desired functionalities. In this work, bleached softwood fibers are oxidatively sulfonated and thereafter homogenized to liberate the cellulose nanofibrils (CNFs) from the fiber walls. The liberated CNFs are subsequently used to prepare and characterize novel cellulose membranes. It is found that the degree of sulfonation collectively affects several important properties of the membranes via the density of fixed charged groups on the surfaces of the CNFs, in particular the membrane morphology, water uptake and swelling, and correspondingly the ionic transport. Both ionic conductivity and cation transport increase with the increased level of sulfonation of the starting material. Thus, it is shown that the chemical modification of the CNFs can be used as a tool for precise and rational design of green ion selective membranes that can replace expensive conventional fluorinated ionomer membranes.

Place, publisher, year, edition, pages
Wiley , 2022. Vol. 6, no 11, article id 2200275
Keywords [en]
crosslinked sulfonated nanocelluloses, ionic transport, pore sizes, selective membranes, water uptake
National Category
Polymer Chemistry Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-329048DOI: 10.1002/adsu.202200275ISI: 000846651200001Scopus ID: 2-s2.0-85136883902OAI: oai:DiVA.org:kth-329048DiVA, id: diva2:1768211
Note

QC 20230614

Available from: 2023-06-15 Created: 2023-06-15 Last updated: 2023-06-15Bibliographically approved

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Erlandsson, JohanWågberg, LarsCrispin, Xavier

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