Cationic surfactants as a non-covalent linker for oxidised cellulose nanofibrils and starch-based hydrogels
(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
- Hossain, Kazi M. Zakir ; Calabrese, Vincenzo ; da Silva, Marcelo A. ; Bryant, Saffron J. ; Schmitt, Julien LU ; Scott, Janet L. and Edler, Karen J. LU
- publishing date
- 2020-04-01
- 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
- 2024-03-06 09:25:08
@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}}, }