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Ion conductivity through TEMPO-mediated oxidated and periodate oxidated cellulose membranes
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
KTH, Stockholm.
Stanford University, Stanford, CA, United States.
Stanford University, Stanford, CA, United States.
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2020 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 233, article id 115829Article in journal (Refereed) Published
Abstract [en]

Cellulose in different forms is increasingly used due to sustainability aspects. Even though cellulose itself is an isolating material, it might affect ion transport in electronic applications. This effect is important to understand for instance in the design of cellulose-based supercapacitors. To test the ion conductivity through membranes made from cellulose nanofibril (CNF) materials, different electrolytes chosen with respect to the Hofmeister series were studied. The CNF samples were oxidised to three different surface charge levels via 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), and a second batch was further cross-linked by periodate oxidation to increase wet strength and stability. The outcome showed that the CNF pre-treatment and choice of electrolyte are both crucial to the ion conductivity through the membranes. Significant specific ion effects were observed for the TEMPO-oxidised CNF. Periodate oxidated CNF showed low ion conductivity for all electrolytes tested due to an inhibited swelling caused by the crosslinking reaction. © 2020 Elsevier Ltd

Place, publisher, year, edition, pages
2020. Vol. 233, article id 115829
Keywords [en]
Cellulose nanofibrils, Ion conductivity, Periodate oxidation, Specific ion effects, Structure-property relationship, TEMPO oxidation
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-38283DOI: 10.1016/j.carbpol.2020.115829Scopus ID: 2-s2.0-85077916225OAI: oai:DiVA.org:miun-38283DiVA, id: diva2:1388636
Available from: 2020-01-27 Created: 2020-01-27 Last updated: 2020-01-27Bibliographically approved

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Dahlström, ChristinaNorgren, Magnus

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