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The effect of crosslinking on ion transport in nanocellulose-based membranes
Linköping Univ, Dept Sci & Technol, Lab Organ Elect, SE-60174 Norrköping, Sweden..
RISE Res Inst Sweden, Bio & Organ Elect, Bredgatan 33, S-60221 Norrköping, Sweden..
Linköping Univ, Dept Sci & Technol, Lab Organ Elect, SE-60174 Norrköping, Sweden..ORCID iD: 0000-0002-7926-1283
Linköping Univ, Dept Sci & Technol, Lab Organ Elect, SE-60174 Norrköping, Sweden..
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2022 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 278, article id 118938Article in journal (Refereed) Published
Abstract [en]

Ion selective membranes are at the heart of energy conversion and harvesting, water treatment, and biotechnologies. The currently available membranes are mostly based on expensive and non-biodegradable polymers. Here, we report a cation-selective and low-cost membrane prepared from renewable nanocellulose and 1,2,3,4-butanetetracarboxylic acid which simultaneously serves as crosslinker and source of anionic surface groups. Charge density and structure of the membranes are studied. By using different degrees of crosslinking, simultaneous control over both the nanochannel structure and surface charge concentration is achieved, which in turn determines the resulting ion transport properties. Increasing negative charge concentration via higher crosslinker content, the obtained ion conductivity reaches up to 8 mS/cm (0.1 M KCl). Optimal ion selectivity, also influenced by the solution pH, is achieved at 20 wt% crosslinker addition (with ion conductivity of 1.6 mS/cm). As regular similar to 1.4 nm nanochannels were formed at this composition, nanofluidic contribution to ion transport is likely.

Place, publisher, year, edition, pages
Elsevier BV , 2022. Vol. 278, article id 118938
Keywords [en]
Nanocellulose, Membrane, Ion conductivity, Ion selectivity, Crosslinking
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-310054DOI: 10.1016/j.carbpol.2021.118938ISI: 000760950500005PubMedID: 34973756Scopus ID: 2-s2.0-85120652221OAI: oai:DiVA.org:kth-310054DiVA, id: diva2:1646324
Note

QC 20220322

Available from: 2022-03-22 Created: 2022-03-22 Last updated: 2022-06-25Bibliographically approved

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Erlandsson, JohanWågberg, Lars

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