Mechanically Robust Gels Formed from Hydrophobized Cellulose Nanocrystals

Rinat Nigmatullin*, Robert Harniman, Valeria Gabrielli, Juan C. Muñoz-García, Yaroslav Z. Khimyak, Jesús Angulo, Stephen J. Eichhorn

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

10 Citations (Scopus)
173 Downloads (Pure)

Abstract

Cellulose nanocrystals (CNCs) that bind to each other through associative hydrophobic interactions have been synthesized by modifying sulfated CNCs (sCNCs) with hydrophobic moieties. These octyl-CNCs form gels at significantly lower concentrations than parent sCNCs, producing extremely strong hydrogels. Unlike sCNCs, these octyl-CNCs do not form ordered liquid crystalline phases indicating a random association into a robust network driven by hydrophobic interactions. Furthermore, involvement of the octyl-CNCs into multicomponent supramolecular assembly was demonstrated in combination with starch. AFM studies confirm favorable interactions between starch and octyl-CNCs, which is thought to be the source of the dramatic increase in gel strength.

Original languageEnglish
Pages (from-to)19318-19322
Number of pages5
JournalACS Applied Materials and Interfaces
Volume10
Issue number23
Early online date23 May 2018
DOIs
Publication statusPublished - 13 Jun 2018

Keywords

  • adhesive force
  • cellulose nanocrystals (CNCs)
  • gels
  • rheology
  • starch

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