The functional properties of a new composite material having water vapor getter properties have been investigated by a large arsenal of characterization techniques. The composite system is originated by combining two constituents having very different chemical natures, a Mg(ClO4)2 salt and a polymeric acrylic matrix. In particular, FT-IR and Raman spectroscopy has been fundamental to understand the type of interactions between the salt and the matrix in different hydration conditions. It was found that in the anhydrous composite system the dispersed Mg(ClO4)2 salt retains its molecular structure, because Mg2+ cations are still surrounded by their [ClO4]- counter-anions; at the same time the salt and the polymeric matrix chemically interact each other at the molecular level. These interactions gradually vanish in the presence of water, up to disappear in the fully hydrated composite system, where the Mg2+ cations are completely solvated by the water molecules.

The Importance of Interactions at the Molecular Level: A Spectroscopic Study of a New Composite Sorber Material

Crocellà , Valentina;Groppo, Elena;Dani, Alessandro;Castellero, Alberto;Bordiga, Silvia;
2017-01-01

Abstract

The functional properties of a new composite material having water vapor getter properties have been investigated by a large arsenal of characterization techniques. The composite system is originated by combining two constituents having very different chemical natures, a Mg(ClO4)2 salt and a polymeric acrylic matrix. In particular, FT-IR and Raman spectroscopy has been fundamental to understand the type of interactions between the salt and the matrix in different hydration conditions. It was found that in the anhydrous composite system the dispersed Mg(ClO4)2 salt retains its molecular structure, because Mg2+ cations are still surrounded by their [ClO4]- counter-anions; at the same time the salt and the polymeric matrix chemically interact each other at the molecular level. These interactions gradually vanish in the presence of water, up to disappear in the fully hydrated composite system, where the Mg2+ cations are completely solvated by the water molecules.
2017
71
10
2278
2285
http://journals.sagepub.com/doi/abs/10.1177/0003702817723053?journalCode=aspc
composite; in situ spectroscopic techniques; magnesium perchlorate; Mg(ClO4)2; polymeric matrix; Solid state drier; Instrumentation; Spectroscopy
Crocellà , Valentina; Groppo, Elena; Dani, Alessandro; Castellero, Alberto; Bordiga, Silvia; Zilio, Stefano; De Simone, Agnello; Vacca, Paolo*...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1652806
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