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Cross-linking cellulose nanofibrils for potential elastic cryo-structured gels

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Author

Summary, in English

Cellulose nanofibrils were produced from P. radiata kraft pulp fibers. The nanofibrillation was facilitated by applying 2,2,6,6-tetramethylpiperidinyl-1-oxyl-mediated oxidation as pretreatment. The oxidized nanofibrils were cross-linked with polyethyleneimine and poly N-isopropylacrylamide-co-allylamine-co-methylenebisacrylamide particles and were frozen to form cryo-structured gels. Samples of the gels were critical-point dried, and the corresponding structures were assessed with scanning electron microscopy. It appears that the aldehyde groups in the oxidized nanofibrils are suitable reaction sites for cross-linking. The cryo-structured materials were spongy, elastic, and thus capable of regaining their shape after a given pressure was released, indicating a successful cross-linking. These novel types of gels are considered potential candidates in biomedical and biotechnological applications.

Department/s

Publishing year

2011

Language

English

Publication/Series

Nanoscale Research Letters

Volume

6

Document type

Journal article

Publisher

Springer

Topic

  • Industrial Biotechnology

Keywords

  • cellulose nanofibrils
  • MFC
  • cryogelation
  • cross-linking

Status

Published

ISBN/ISSN/Other

  • ISSN: 1931-7573