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@ARTICLE{Gaudino:825695,
author = {Gaudino, D. and Pasquino, R. and Stellbrink, J. and
Szekely, N. and Krutyeva, M. and Radulescu, A. and
Pyckhout-Hintzen, W. and Grizzuti, N.},
title = {{T}he role of the binding salt sodium salicylate in
semidilute ionic cetylpyridinium chloride micellar
solutions: a rheological and scattering study},
journal = {Physical chemistry, chemical physics},
volume = {19},
number = {1},
issn = {1463-9084},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2017-00012},
pages = {782 - 790},
year = {2017},
abstract = {The micellar system based on cetylpyridinium chloride
(CPyCl) and sodium salicylate (NaSal) in brine solution is
investigated on both macro- and micro-length scales through
rheology and scattering measurements. The linear
viscoelasticity of the system and its structural parameters
are explored by systematically changing the amount of NaSal
over an extremely wide range of concentrations, thus
producing salt-to-surfactant molar ratios from zero to about
8.5. As a result, the well-known non-monotonic behaviour of
the zero-shear rate viscosity as a function of salinity can
be connected to micellar morphological changes, whose
driving force is represented by the simultaneous binding and
screening actions of NaSal. The viscosity behaviour can be
seen as a direct consequence of consecutive
lengthening/shortening of the contour length, where the
micelles attempt to minimize the electrostatic charge
density on their surface. Along similar lines, the
scattering measurements of the semidilute solutions show
that the local stiffness of the micellar chain changes with
increasing salt content influencing the elasticity of the
resulting network. Within this general view, the branching
of the micelles can be seen as a side effect attributable to
the main character of the play, namely, the binding salt
NaSal, whereas the overall dynamics of the system is driven
by the considerable changes in the entanglement density of
the micellar network.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS (München) ;
Jülich Centre for Neutron Science JCNS (München) ;
JCNS-FRM-II},
ddc = {540},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
experiment = {EXP:(DE-MLZ)KWS2-20140101 / EXP:(DE-MLZ)KWS3-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000391725300081},
pubmed = {pmid:27929164},
doi = {10.1039/C6CP06964A},
url = {https://juser.fz-juelich.de/record/825695},
}