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Doctoral thesis . 2023
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Relación microestructura-propiedades y comportamiento tribológico de nuevos nanocomposites

Novel nanocomposites: relationship between microstructure-properties and tribological behavior
Authors: Mínguez Enkovaara, Luis Francisco;

Relación microestructura-propiedades y comportamiento tribológico de nuevos nanocomposites

Abstract

[SPA] El polimetilmetacrilato (PMMA) es un polímero termoplástico globalmente conocido, con destacadas propiedades de transparencia, biocompatibilidad, resistencia al ambiente, rigidez y fácil procesabilidad, pero con baja resistencia a la fricción y al desgaste. En el presente trabajo se han estudiado las propiedades tribológicas del PMMA, modificándolo con diferentes concentraciones de nanofases basadas en óxido de grafeno, y óxido de grafeno modificado con el líquido iónico tetrafluoroborato de 1-octil-3-metilimidazolio ([Omim]BF4). Los nuevos nanocomposites fueron elaborados mediante los procesos industriales de extrusión y moldeo por inyección, para ser estudiados tribológicamente bajo dos tipos de contacto, lineal oscilatorio y multirrayado, realizando también una caracterización estructural completa de los nanocomposites y nanofases, aplicando técnicas como XRD, XPS, espectroscopía Raman, TEM, TGA, DSC o DMA. [ENG] Polymethylmethacrylate (PMMA) is a globally widespread thermoplastic in our ordinary life with outstanding properties for plastics like its transparency, biocompatibility, weatherability, rigidity, and processability. In this work, graphene-oxide-based nanoadditives are incorporated into a PMMA matrix to enhance its tribological properties. As a result, different concentrations of graphene oxide, some of them functionalized with 1- octyl-3-methylimidazolium tetrafluoroborate ([Omim]BF4) room temperature ionic liquid, have been added and melt-blended by extrusion and molding injection industrial processes. In pursuance of a complete study of the structural and tribological behavior of the new nanocomposite materials, linear oscillatory sliding contact and multi-scratch tribological tests, together with structural and thermal characterization techniques are applied (XRD, XPS, Raman spectroscopy, TEM, TGA, DSC, DMA) correlating the results to their nano-phase concentrations.

El presente trabajo ha contado con la financiación de los proyectos de investigación del Ministerio de Economía, Industria y Competitividad (MINECO, España) (códigos: PID2021-122169NB-I00, MAT2017-85130-P y MAT2014-55384-P) y de Ayudas a Grupos de Excelencia de la Región de Murcia, de la Fundación Séneca, Agencia de Ciencia y Tecnología de la Región de Murcia (código: 19877/GERM/15).

Escuela Internacional de Doctorado de la Universidad Politécnica de Cartagena

Programa de Doctorado en Tecnologías Industriales

Universidad Politécnica de Cartagena

Country
Spain
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Keywords

Polímeros, Ensayo de materiales, Tribología, 2211.30 Tribología, 2211.02 Materiales Compuestos, Ciencia de los Materiales e Ingeniería Metalúrgica, Materiales compuestos

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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