Browsing Departament de Ciència dels Materials i Química Física by Subject "62"

Alkali-activated binders based on municipal solid waste incineration bottom ash

Maldonado Alameda, Alex (Date of defense: 2021-06-28)

Municipal solid waste incineration (MSWI) is the most widely used solution in those countries where landfilling areas are limited. Incineration allows reducing the total volume of waste (up to 90%) and generating energy ...

Caracterización y modelización de los fenómenos triboquímicos en la interfaz pastilla/rotor relacionados con el uso de sulfuros sintéticos mixtos en materiales de fricción sin cobre

Macías Benalcázar, Jenifer Gabriela (Date of defense: 2022-05-20)

Los sulfuros metálicos tienen un papel fundamental en los materiales de fricción, en los que actúan como aditivos que estabilizan el coeficiente de fricción y reducen el desgaste a alta temperatura. Estas propiedades de ...

Desenvolupament de nous materials basats en alúmina per fabricació additiva mitjançant estereolitografia

Barcelona Pons, Pol (Date of defense: 2023-01-27)

[cat] La estereolitografia (SLA) és la primera de les tecnologies de fabricació additiva desenvolupada. Aquesta consisteix en la fotopolimerització d’una resina líquida per capes mitjançant la irradiació selectiva de l’àrea ...

Desenvolupament de sistemes superhidrofòbics sobre substrats metàl·lics: estudi de l’estabilitat i la seva aplicació amb criteris de sostenibilitat

Rius Ayra, Oriol (Date of defense: 2019-10-30)

A la natura existeixen diferents animals o plantes com ara els sabaters (Gerris remigis), la flor de lotus (Nelumbo nucifera) o les fulles d’arròs (Oriza sativa) que presenten propietats extraordinàries com ara l’auto-neteja ...

Economía circular de la Guadua angustifolia Kunth (GaK) como una alternativa de construcción sostenible

Torres Ruilova, Bismark Osmany (Date of defense: 2024-07-17)

[spa] La presente tesis doctoral se centra en el aprovechamiento sostenible de la Guadua angustifolia Kunth (GaK), una especie de bambú predominante en las regiones tropicales y subtropicales, especialmente en América ...

Estudio de desechos industriales usados como materiales de almacenamiento de energía termoquímica

Mamani Challapa, Verónica Lisbeth (Date of defense: 2019-07-05)

Los sistemas de almacenamiento de energía termoquímica presentan la ventaja de usar materiales que almacenan una alta densidad energética por un tiempo ilimitado, características importantes para ser aprovechadas para ...

Evolución de las propiedades de tuberías de PP-R en servicio

Ferrer, Josep Mª (Date of defense: 2023-09-06)

[spa] Esta tesis está enfocada en la búsqueda de hitos y nuevos conceptos que permitan la mejora de un producto que actualmente está dominando el mercado en su nicho de negocio español: las tuberías de PP-RCT. La empresa ...

Hidrofobicitat en metalls modificats superficialment

Escobar Romero, Ana Maria (Date of defense: 2018-12-09)

La modificació de les superfícies dels materials permet obtenir propietats diferents a les que presenta el substrat prèviament o preservar-lo del medi que l’envolta. Les tècniques emprades amb aquest objectiu són molt ...

Mechanical and functional properties in magnetic materials

Calvo de la Rosa, Jaume (Date of defense: 2019-10-25)

This doctoral Thesis has been focused on the preparation of magnetic materials by different methods, the characterization of their structural characteristics, and the understanding of their mechanical and magnetic properties. ...

Nitrate and Pesticide Removal from Groundwater Using Different Electrochemical Reactors

Oriol López, Roger (Date of defense: 2023-10-23)

[eng] Groundwater has been traditionally considered a reliable source of freshwater. However, the low replenishment rates and the increasing contamination due to different anthropogenic activities, such as the use of ...

Nitrate salt-based nanofluids for thermal energy storage

Svobodova, Adela (Date of defense: 2022-07-19)

For the development of more compact and efficient thermal systems, nanofluids are presented as a promising option to replace conventional heat transfer fluids. Nanofluids are a suspension of low concentration of nanoparticles ...

Optimal Selection, Characterization, and Life Cycle Assessment of Sustainable Materials for Thermal Energy Storage in Concentrating Solar Power: A Circular Economy Approach

Majó Robles, Marc (Date of defense: 2024-07-02)

[eng] The world's energy dilemma, balancing supply and demand, finds a potential solution in energy storage technologies. Energy storage systems store excess energy during low-demand periods for later use. This approach ...

Strategies to synthesize carbon-supported elctrocatalysts with reduced Pt content and increased activity for use in low temperature fuel cells

Garcia Cardona, Júlia (Date of defense: 2023-12-04)

[eng] Conventional catalysts for polymer electrolyte fuel cells are based on Pt supported on porous carbons, generally carbon blacks. However, Pt is expensive and scarce and is poisoned by CO, which is present in the ...

Study of solid particle materials as high temperature Thermal Energy Storage and Heat Transfer Fluid for Concentrating Solar Power

Calderón Díaz, Alejandro (Date of defense: 2019-10-24)

Renewable energies have a major role in today’s energy systems development, energy security and climate change fight. Thermal Concentrating Solar Power (CSP) has the potential to get up to 11.3% of world’s electricity ...

Synthesis and Optimisation of Layered Hybrid Organic-Inorganic Perovskites as Solid-State Thermal Energy Storage Materials

Salgado Pizarro, Rebeca (Date of defense: 2024-12-11)

[eng] The effective use of thermal energy storage (TES) systems has demonstrated their ability to enhance energy efficiency and sustainability across various sectors. These systems play a critical role in facilitating the ...