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@ARTICLE{Costanzo:889081,
author = {Costanzo, Salvatore and Banc, Amélie and Louhichi, Ameur
and Chauveau, Edouard and Wu, Baohu and Morel,
Marie-Hélène and Ramos, Laurence},
title = {{T}ailoring the {V}iscoelasticity of {P}olymer {G}els of
{G}luten {P}roteins through {S}olvent {Q}uality},
journal = {Macromolecules},
volume = {53},
number = {21},
issn = {1520-5835},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2021-00017},
pages = {9470 - 9479},
year = {2020},
abstract = {We investigate the linear viscoelasticity of polymer gels
produced by the dispersion of gluten proteins in
water/ethanol binary mixtures with various ethanol contents,
from pure water to $60\%$ v/v ethanol. We show that the
complex viscoelasticity of the gels exhibits a time/solvent
composition superposition principle, demonstrating the
self-similarity of the gels produced in different binary
solvents. All gels can be regarded as near critical gels
with characteristic rheological parameters, elastic plateau,
and characteristic relaxation time, which are related to one
another, as a consequence of self-similarity, and span
several orders of magnitude when changing the solvent
composition. Thanks to calorimetry and neutron scattering
experiments, we evidence a cosolvency effect with better
solvation of the complex polymer-like chains of the gluten
proteins as the amount of ethanol increases. Overall, the
gel viscoelasticity can be accounted for by a unique
characteristic length characterizing the cross-link density
of the supramolecular network, which is solvent
composition-dependent. On a molecular level, these findings
could be interpreted as a transition of the supramolecular
interactions, mainly H-bonds, from intra- to interchains,
which would be facilitated by the disruption of hydrophobic
interactions by ethanol molecules. This work provides a new
insight for tailoring the gelation process of complex
polymer gels.},
cin = {JCNS-4 / JCNS-1 / JCNS-FRM-II / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-4-20201012 / I:(DE-Juel1)JCNS-1-20110106 /
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)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)KWS3-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000592413300029},
doi = {10.1021/acs.macromol.0c01466},
url = {https://juser.fz-juelich.de/record/889081},
}