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

In English

Författare

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.

Avdelning/ar

Publiceringsår

2011

Språk

Engelska

Publikation/Tidskrift/Serie

Nanoscale Research Letters

Volym

6

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Industrial Biotechnology

Nyckelord

  • cellulose nanofibrils
  • MFC
  • cryogelation
  • cross-linking

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1931-7573