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@ARTICLE{Larsson:889932,
author = {Larsson, Johan and Sanchez-Fernandez, Adrian and Leung,
Anna E. and Schweins, Ralf and Wu, Baohu and Nylander, Tommy
and Ulvenlund, Stefan and Wahlgren, Marie},
title = {{M}olecular structure of maltoside surfactants controls
micelle formation and rheological behavior},
journal = {Journal of colloid and interface science},
volume = {581},
number = {Part B},
issn = {0021-9797},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-00538},
pages = {895 - 904},
year = {2021},
abstract = {HypothesisThe anomeric configuration (α or β) of
n-hexadecyl-d-maltopyranoside (C16G2) has been shown to
affect the morphology of the micelle, from elongated for
α-C16G2 to worm-like micelles for β-C16G2. The
entanglement of worm-like micelles often leads to strong
modifications of the rheological behavior of the system and,
as such, the anomeric configuration of C16G2 could also
provide the possibility of controlling this. Furthermore,
mixing these surfactants are hypothesized to result in mixed
micelles allowing to finely tune the rheology of a system
containing these sustainable surfactants.ExperimentsThe
rheology of α- and β-C16G2, and mixtures of those, was
determined by rotational and oscillatory rheology at
different temperatures and surfactant concentrations.
Micelle structure and composition for these systems were
characterized using contrast variation small-angle neutron
scattering and small-angle X-ray scattering. The results
from these were connected in order to elaborate a molecular
understanding of the rheological response of the
system.FindingsThe self-assembly of these surfactants have
been found to result in different rheological properties.
β-C16G2 show a high viscosity with a non-Newtonian
viscoelastic behavior, which was linked to the formation of
worm-like micelles. In contrast, α-C16G2 self-assembled
into short cylindrical micelles, resulting in a Newtonian
fluid with low viscosity. Furthermore, mixtures of these two
surfactants lead to systems with intermediate rheological
properties as a result of the formation of micelles with
intermediate morphology to those of the pure anomers. These
results also show that the rheological properties of the
system can be tuned to change the micelle morphology, which
in turn depends on the anomeric configuration of the
surfactant. Also, surfactant concentration, temperature of
the system, and micelle composition for surfactant mixtures
provide control over the rheological properties of the
system in a wide temperature range. Therefore, these results
open new possibilities in the development of sustainable
excipients for formulation technology, where the
characteristics of the system can be easily tailored through
geometric variations in the monomer structure whilst
maintaining the chemical composition of the system.},
cin = {JCNS-1 / JCNS-4 / JCNS-FRM-II / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-4-20201012 /
I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (FZJ) (POF4-6G4) / 632 - Materials
– Quantum, Complex and Functional Materials (POF4-632)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF4-6G4 /
G:(DE-HGF)POF4-632},
experiment = {EXP:(DE-MLZ)KWS3-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {32950938},
UT = {WOS:000604318400027},
doi = {10.1016/j.jcis.2020.08.116},
url = {https://juser.fz-juelich.de/record/889932},
}