تقرير
Impact of the protein composition on the structure and viscoelasticity of polymer-like gluten gels
| العنوان: | Impact of the protein composition on the structure and viscoelasticity of polymer-like gluten gels |
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| المؤلفون: | Ramos, Laurence, Banc, Amélie, Louhichi, Ameur, Pincemaille, Justine, Jestin, Jacques, Fu, Zhendong, Appavou, Marie-Sousai, Menut, Paul, Morel, Marie-Hélène |
| المصدر: | J. Phys.: Condens. Matter 33 (2021) 144001 |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter |
| الوصف: | We investigate the structure of gluten polymer-like gels in a binary mixture of water/ethanol, $50/50$ v/v, a good solvent for gluten proteins. Gluten comprises two main families of proteins, monomeric gliadins and polymer glutenins. In the semi-dilute regime, scattering experiments highlight two classes of behavior, akin to standard polymer solution and polymer gel, depending on the protein composition. We demonstrate that these two classes are encoded in the structural features of the proteins in very dilute solution, and are correlated with the presence of proteins assemblies of typical size tens of nanometers. The assemblies only exist when the protein mixture is sufficiently enriched in glutenins. They are found directly associated to the presence in the gel of domains enriched in non-exchangeable H-bonds and of size comparable to that of the protein assemblies. The domains are probed in neutron scattering experiments thanks to their unique contrast. We show that the sample visco-elasticity is also directly correlated to the quantity of domains enriched in H-bonds, showing the key role of H-bonds in ruling the visco-elasticity of polymer gluten gels. Comment: accepted for publication in Journal of Physics: Condensed Matter, Special issue on "Glasses and gels: a crossroad of molecular liquids, polymers and colloids" |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1361-648X/abdf91 |
| URL الوصول: | http://arxiv.org/abs/2101.07322 |
| رقم الأكسشن: | edsarx.2101.07322 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1361-648X/abdf91 |
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