Cellulose modified to host functionalities via facile cation exchange approach
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-05-15
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Language
en
Pages
7
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Carbohydrate Polymers, Volume 332
Abstract
Properties of cellulose are typically functionalized by organic chemistry means. We progress an alternative facile way to functionalize cellulose by functional group counter-cation exchange. While ion-exchange is established for cellulose, it is far from exploited and understood beyond the most common cation, sodium. We build on our work that established the cation exchange for go-to alkali metal cations. We expand and further demonstrate the introduction of functional cations, namely, lanthanides. We show that cellulose nanocrystals (CNCs) carrying sulfate-half ester groups can acquire properties through the counter-cation exchange. Trivalent lanthanide cations europium (Eu3+), dysprosium (Dy3+) and gadolinium (Gd3+) were employed. The respective ions showed distinct differences in their ability of being coordinated by the sulfate groups; with Eu3+ fully saturating the sulfate groups while for Gd3+ and Dy3+, values of 82 and 41 % were determined by compositional analysis. CNCs functionalized with Eu3+ displayed red emission, those containing Dy3+ exhibited no optical functionality, while those with Gd3+ revealed significantly altered magnetic relaxation times. Using cation exchange to alter cellulose properties in various ways is a tremendous opportunity for modification of the abundant cellulose raw materials for a renewable future.Description
Publisher Copyright: © 2023
Keywords
Lanthanides, Luminescence, Rheology
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Citation
Spiliopoulos, P, Navarro, S L, Orzan, E, Ghanbari, R, Pietschnig, R, Stilianu, C, Spirk, S, Schaefer, A, Kádár, R & Nypelö, T 2024, ' Cellulose modified to host functionalities via facile cation exchange approach ', Carbohydrate Polymers, vol. 332, 121857 . https://doi.org/10.1016/j.carbpol.2024.121857