Home > Publications database > Structural and molecular response in cyclodextrin-based pH-sensitive hydrogels by the joint use of Brillouin, UV Raman and Small Angle Neutron Scattering techniques > print

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024 7 _ |a 10.1016/j.molliq.2018.08.141
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024 7 _ |a 1873-3166
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082 _ _ |a 540
100 1 _ |a Rossi, B.
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245 _ _ |a Structural and molecular response in cyclodextrin-based pH-sensitive hydrogels by the joint use of Brillouin, UV Raman and Small Angle Neutron Scattering techniques
260 _ _ |a New York, NY [u.a.]
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|b Elsevier
336 7 _ |a article
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520 _ _ |a The response to pH variation of polymeric cyclodextrin-based hydrogels has been investigated by a multi-technique approach based on UV Raman and Brillouin light scattering (BLS) together with Small Angle Neutron Scattering (SANS). By exploiting the complementary information of these three investigation methods, the structural, viscoelastic and molecular modifications of the polymer brought about by the pH changes have been examined, over a spatial range going from mesoscopic to nanoscopic length-scale. The data provide a picture where an increase of pH promotes the change of the characteristic size of the hydrophilic pores when the cross-linker has the suitable structural and acid-base properties, and leads to the reinforcement of the polymer domains interconnections, providing a stiffer gel network on the length-scale probed by BLS. Raman signals are sensitive both to structural changes of the polymer network and to changes of the intermolecular ordering of water due to solvent-polymer interactions. The destructuring effect on the tetrahedral ice-like configurations of water is especially evident at high pH, and might be ascribed to an increased exposition to the solvent of the ionic portions of the polymer surface.
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650 1 7 |a Polymers, Soft Nano Particles and Proteins
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693 _ _ |a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
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700 1 _ |a Bottari, C.
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700 1 _ |a Comez, L.
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700 1 _ |a Corezzi, S.
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700 1 _ |a Paolantoni, M.
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700 1 _ |a Gessini, A.
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700 1 _ |a Masciovecchio, C.
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700 1 _ |a Mele, A.
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700 1 _ |a Punta, C.
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700 1 _ |a Melone, L.
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700 1 _ |a Fiorati, A.
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700 1 _ |a Radulescu, Aurel
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700 1 _ |a Mangiapia, Gaetano
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700 1 _ |a Paciaroni, A.
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773 _ _ |a 10.1016/j.molliq.2018.08.141
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