Mechanically robust gels formed from hydrophobized cellulose nanocrystals

Nigmatullin, Rinat, Harniman, Robert, Gabrielli, Valeria, Muñoz-García, Juan C., Khimyak, Yaroslav Z. ORCID: https://orcid.org/0000-0003-0424-4128, Angulo, Jesús ORCID: https://orcid.org/0000-0001-7250-5639 and Eichhorn, Stephen J. (2018) Mechanically robust gels formed from hydrophobized cellulose nanocrystals. ACS Applied Materials & Interfaces, 10 (23). 19318–19322. ISSN 1944-8244

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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.

Item Type:	Article
Uncontrolled Keywords:	adhesive force,cellulose nanocrystals (cncs),gels,rheology,starch
Faculty \ School:	Faculty of Science > School of Pharmacy (former - to 2024)
UEA Research Groups:	Faculty of Science > Research Groups > Pharmaceutical Materials and Soft Matter
Depositing User:	Pure Connector
Date Deposited:	29 May 2018 16:30
Last Modified:	25 Sep 2024 13:26
URI:	https://ueaeprints.uea.ac.uk/id/eprint/67234
DOI:	10.1021/acsami.8b05067

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