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Customising Sustainable Bio-Based Polyelectrolytes : Introduction of Charged and Hydrophobic Groups in Cellulose

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2024

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Magalhães, Solange
Aliaño-González, María José
Cruz, Pedro F.
Norgren, Magnus
Alves, Luís
Medronho, Bruno
da Graça Rasteiro, Maria

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Polymers. MDPI. 2024, 16(22), 3105. eISSN 2073-4360. Verfügbar unter: doi: 10.3390/polym16223105

Zusammenfassung

Cellulose has been widely explored as a sustainable alternative to synthetic polymers in industrial applications, thanks to its advantageous properties. The introduction of chemical modifications on cellulose structure, focusing on cationic and hydrophobic modifications, can enhance its functionality and expand the range of applications. In the present work, cationization was carried out through a two-step process involving sodium periodate oxidation followed by a reaction with the Girard T reagent, yielding a degree of substitution for cationic groups (DScationic) between 0.3 and 1.8. Hydrophobic modification was achieved via esterification with fatty acids derived from commercial plant oils, using an enzyme-assisted, environmentally friendly method. Lipase-catalysed hydrolysis, optimised at 0.25% enzyme concentration and with a 1 h reaction time, produced an 84% yield of fatty acids, confirmed by FTIR and NMR analyses. The degree of substitution for hydrophobic groups (DShydrophobic) ranged from 0.09 to 0.66. The molecular weight (MW) of the modified cellulose derivatives varied from 1.8 to 141 kDa. This dual modification strategy enables the creation of cellulose-based polymers with controlled electrostatic and hydrophobic characteristics, customisable for specific industrial applications. Our approach presents a sustainable and flexible solution for developing cellulose derivatives tailored to diverse industrial needs.

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540 Chemie

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cellulose, functionalisation, cationization, hydrophobicity, vegetable fatty acids

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ISO 690MAGALHÃES, Solange, María José ALIAÑO-GONZÁLEZ, Pedro F. CRUZ, Rose ROSENBERG, Dirk HAFFKE, Magnus NORGREN, Luís ALVES, Bruno MEDRONHO, Maria DA GRAÇA RASTEIRO, 2024. Customising Sustainable Bio-Based Polyelectrolytes : Introduction of Charged and Hydrophobic Groups in Cellulose. In: Polymers. MDPI. 2024, 16(22), 3105. eISSN 2073-4360. Verfügbar unter: doi: 10.3390/polym16223105
BibTex
@article{Magalhaes2024-11-05Custo-71721,
  year={2024},
  doi={10.3390/polym16223105},
  title={Customising Sustainable Bio-Based Polyelectrolytes : Introduction of Charged and Hydrophobic Groups in Cellulose},
  number={22},
  volume={16},
  journal={Polymers},
  author={Magalhães, Solange and Aliaño-González, María José and Cruz, Pedro F. and Rosenberg, Rose and Haffke, Dirk and Norgren, Magnus and Alves, Luís and Medronho, Bruno and da Graça Rasteiro, Maria},
  note={Article Number: 3105}
}
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