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Nanoporous materials, such as mesoporous silicas (e.g., MCM-41 and SBA-15) and metal-organic frameworks (MOFs), exhibit unique properties that make them essential for various applications, including catalysis, separation, and energy storage. A key aspect of energy storage in these materials is the intrusion of water into their pores, a process that converts mechanical energy into interfacial energy. This phenomenon depends on the pore size but essentially on the chemical nature of the material surface, ranging from hydrophilic to hydrophobic, and requires the application of external pressure, as governed by the Laplace law. The intrusion/extrusion processes and their implications for energy storage are studied thanks to the combination of homemade high-pressure calorimeter and high-pressure neutron diffraction experiments performed on the instruments G6.1 and G4.4 at the LLB and D16 at the ILL, with materials synthetized and characterized at the LLB. These experiments enable the investigation of material properties on one side, and, on the other side, the phase transitions of the confined fluid at various P and T, under various compression modes, such as liquid or gas compression. Understanding the influence of confinement on the thermodynamic properties of fluids is crucial, as confinement leads to significant modifications in these properties and the resulting heat exchanges. Different phase diagrams of confined water are found affecting their potential applications, by not only optimizing the conditions of use of these materials for energy storage, but also giving access to unexpected properties of water, opening up new perspectives in biology and geology.
- Brodie-Linder, Nancy, Johnny Deschamps, Fabrice Audonnet, et Christiane Alba-Simionesco. « Method to Create a Hydrophilic Environment within Hydrophobic Nanostructures ». Microporous and Mesoporous Materials 179 (septembre 2013): 17 21.
- Osta, Oriana, Marianne Bombled, David Partouche, Florian Gallier, Nadège Lubin-Germain, Nancy Brodie-Linder, and Christiane Alba-Simionesco. « Direct Synthesis of Mesoporous Organosilica and Proof-of-Concept Applications in Lysozyme Adsorption and Supported Catalysis ». ACS Omega 5, no 30 (4 août 2020): 18842 48.
- Osta-Rangel, Oriana. « Water Confined in Hydrophobic Nanopores ˸ Towards a New Phase Diagram », s. d.
- Karbowiak, Thomas, Guy Weber, et Jean-Pierre Bellat. « Confinement of Water in Hydrophobic Nanopores: Effect of the Geometry on the Energy of Intrusion ». Langmuir 30, no 1 (14 janvier 2014): 213 19.
