RT info:eu-repo/semantics/bachelorThesis
T1 A new plastic crystal composition with thermal energy storage potential
A1 Paz Cosgaya, María
A2 Universidad de Valladolid. Facultad de Ciencias
K1 Plastic crystal
K1 Thermal energy
K1 Supramolecular materials
AB Plastic crystals are supramolecular materials with a long-range crystallographic order that go through a phase transition to a phase where the crystal structure is maintained but a local structural disorder is introduced. This phase transition is a mesophase transition, and it is a solid-solid transition where the molecules gain enough free energy so they can rotate freely but there are still weak interactions that maintain the crystal structure. Due to this higher entropy change, these types of compounds can store more energy than other solid-solid state materials.Bis-[(3,4-dimethylphenyl)oxonium](dibromo dichloro zincate) ((DMP)2 [ZnBr2Cl2]) is a new composition with thermal energy storage potential that has been synthetized by in this project, with the aim of identifying new plastic crystal compositions. As the structure of the material was unknown, it was determined with X-ray diffraction, and the thermal properties of the material were studied using differential scanning calorimetry, so the different phase transitions of the material and its properties could be determined and decide whether or not the material is a plastic crystal. The results showed that small modifications of the synthesis change the crystal habit and properties of the final crystals. The DSC analyses showed that the material has a phase transition in a temperature range below 100 ºC that might be applicable to domestic (personal housing) applications, rather than industrial applications.
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/63399
UL https://uvadoc.uva.es/handle/10324/63399
LA eng
NO Departamento de Química Física y Química Inorgánica
DS UVaDOC
RD 18-sep-2024