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Cationic surfactants as a non-covalent linker for oxidised cellulose nanofibrils and starch-based hydrogels

Hossain, Kazi M. Zakir ; Calabrese, Vincenzo ; da Silva, Marcelo A. ; Bryant, Saffron J. ; Schmitt, Julien LU ; Scott, Janet L. and Edler, Karen J. LU orcid (2020) In Carbohydrate Polymers 233.
Abstract

Rheological properties of hydrogels composed of TEMPO-oxidised cellulose nanofibrils (OCNF)-starch in the presence of cationic surfactants were investigated. The cationic surfactants dodecyltrimethylammonium bromide (DTAB) and cetyltrimethylammonium bromide (CTAB) were used to trigger gelation of OCNF at around 5 mM surfactant. As OCNF and DTAB/CTAB are oppositely charged, an electrostatic attraction is suggested to explain the gelation mechanism. OCNF (1 wt%) and soluble starch (0.5 and 1 wt%) were blended to prepare hydrogels, where the addition of starch to the OCNF resulted in a higher storage modulus. Starch polymers were suggested to form networks with cellulose nanofibrils. The stiffness and viscosity of OCNF-Starch hydrogels... (More)

Rheological properties of hydrogels composed of TEMPO-oxidised cellulose nanofibrils (OCNF)-starch in the presence of cationic surfactants were investigated. The cationic surfactants dodecyltrimethylammonium bromide (DTAB) and cetyltrimethylammonium bromide (CTAB) were used to trigger gelation of OCNF at around 5 mM surfactant. As OCNF and DTAB/CTAB are oppositely charged, an electrostatic attraction is suggested to explain the gelation mechanism. OCNF (1 wt%) and soluble starch (0.5 and 1 wt%) were blended to prepare hydrogels, where the addition of starch to the OCNF resulted in a higher storage modulus. Starch polymers were suggested to form networks with cellulose nanofibrils. The stiffness and viscosity of OCNF-Starch hydrogels were enhanced further by the addition of cationic surfactants (5 mM of DTAB/CTAB). ζ -potential and amylose-iodine complex analyses were also conducted to confirm surface charge and interaction of OCNF-starch-surfactant in order to provide an in-depth understanding of the surfactant-induced gel networks.

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author
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publishing date
type
Contribution to journal
publication status
published
keywords
Cationic surfactant, Cellulose nanofibrils, Rheology, Starch
in
Carbohydrate Polymers
volume
233
article number
115816
publisher
Elsevier
external identifiers
  • pmid:32059878
  • scopus:85077511085
ISSN
0144-8617
DOI
10.1016/j.carbpol.2019.115816
language
English
LU publication?
no
additional info
Publisher Copyright: © 2020 Elsevier Ltd
id
b1bcbcc6-da89-412c-99d7-9da18c0e0129
date added to LUP
2023-01-18 09:02:15
date last changed
2025-10-14 10:00:44
@article{b1bcbcc6-da89-412c-99d7-9da18c0e0129,
  abstract     = {{<p>Rheological properties of hydrogels composed of TEMPO-oxidised cellulose nanofibrils (OCNF)-starch in the presence of cationic surfactants were investigated. The cationic surfactants dodecyltrimethylammonium bromide (DTAB) and cetyltrimethylammonium bromide (CTAB) were used to trigger gelation of OCNF at around 5 mM surfactant. As OCNF and DTAB/CTAB are oppositely charged, an electrostatic attraction is suggested to explain the gelation mechanism. OCNF (1 wt%) and soluble starch (0.5 and 1 wt%) were blended to prepare hydrogels, where the addition of starch to the OCNF resulted in a higher storage modulus. Starch polymers were suggested to form networks with cellulose nanofibrils. The stiffness and viscosity of OCNF-Starch hydrogels were enhanced further by the addition of cationic surfactants (5 mM of DTAB/CTAB). ζ -potential and amylose-iodine complex analyses were also conducted to confirm surface charge and interaction of OCNF-starch-surfactant in order to provide an in-depth understanding of the surfactant-induced gel networks.</p>}},
  author       = {{Hossain, Kazi M. Zakir and Calabrese, Vincenzo and da Silva, Marcelo A. and Bryant, Saffron J. and Schmitt, Julien and Scott, Janet L. and Edler, Karen J.}},
  issn         = {{0144-8617}},
  keywords     = {{Cationic surfactant; Cellulose nanofibrils; Rheology; Starch}},
  language     = {{eng}},
  month        = {{04}},
  publisher    = {{Elsevier}},
  series       = {{Carbohydrate Polymers}},
  title        = {{Cationic surfactants as a non-covalent linker for oxidised cellulose nanofibrils and starch-based hydrogels}},
  url          = {{http://dx.doi.org/10.1016/j.carbpol.2019.115816}},
  doi          = {{10.1016/j.carbpol.2019.115816}},
  volume       = {{233}},
  year         = {{2020}},
}