Browsing by Author "Blanco, Miren"
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Item Effect of Different Types of Electrospun Polyamide 6 Nanofibres on the Mechanical Properties of Carbon Fibre/Epoxy Composites(2018-10-25) Monteserín, Cristina; Blanco, Miren; Murillo, Nieves; Pérez-Márquez, Ana; Maudes, Jon; Gayoso, Jorge; Laza, Jose; Aranzabe, Estíbaliz; Vilas, Jose; Tecnalia Research & Innovation; PRINTEX; Caracterización y Validación. MecánicosDelamination and brittle matrix fracture have long since been the biggest problems in fibre-reinforced composites. Recently, the incorporation of electrospun nanofibre veils has been shown to be an effective method for improving the mechanical properties of these composites, without causing process problems and negatively affecting other mechanical properties. Thus, these nanofibres have the potential to be used as thickness-reinforcing materials in composites. This paper investigates the effect of incorporating standalone electrospun nanofibre veils made of two different types of polyamide 6 (PA6) on the mechanical properties of carbon fibre/epoxy composites. The influence of positioning the electrospun veils at different interlaminar positions of the laminate has also been investigated.Item Novel Antibacterial and Toughened Carbon-Fibre/Epoxy Composites by the Incorporation of TiO2 Nanoparticles Modified Electrospun Nanofibre Veils(2019-09-01) Monteserín, Cristina; Blanco, Miren; Murillo, Nieves; Pérez-Márquez, Ana; Maudes, Jon; Gayoso, Jorge; Laza, Jose Manuel; Hernáez, Estíbaliz; Aranzabe, Estíbaliz; Vilas, Jose Luis; Tecnalia Research & Innovation; PRINTEX; Caracterización y Validación. MecánicosThe inclusion of electrospun nanofiber veils was revealed as an effective method for enhancing the mechanical properties of fiber-reinforced epoxy resin composites. These veils will eventually allow the incorporation of nanomaterials not only for mechanical reinforcement but also in multifunctional applications. Therefore, this paper investigates the effect of electrospun nanofibrous veils made of polyamide 6 modified with TiO2 nanoparticles on the mechanical properties of a carbon-fiber/epoxy composite. The nanofibers were included in the carbon-fiber/epoxy composite as a single structure. The effect of positioning these veils in different composite positions was investigated. Compared to the reference, the use of unmodified and TiO2 modified veils increased the flexural stress at failure and the fracture toughness of composites. When TiO2 modified veils were incorporated, new antibacterial properties were achieved due to the photocatalytic properties of the veils, widening the application area of these composites.Item TiO2-Doped Electrospun Nanofibrous Membrane for Photocatalytic Water Treatment(2019-04-26) Blanco, Miren; Monteserín, Cristina; Angulo, Adrián; Pérez-Márquez, Ana; Maudes, Jon; Murillo, Nieves; Aranzabe, Estíbaliz; Ruiz-Rubio, Leire; Vilas, Jose Luis; Tecnalia Research & Innovation; PRINTEXThis work has been focused on the one-step fabrication by electrospinning of polyamide 6 (PA6) nanofibre membranes modified with titanium dioxide nanoparticles (TiO2), where these TiO2 nanoparticles aggregates could induce a photocatalytic activity. The main potential application of these membranes could be the purification of contaminated water. Thus, it is important to analyse the contaminant degradation capability since in these membranes this is based on their photocatalytic activity. In this work, the effect of the photocatalysis has been studied both on the degradation of an organic model contaminant and on the removal of Escherichia coli and other coliform bacteria. As a result, it was observed that these membranes present excellent photocatalytic activity when they are irradiated under UV light, allowing a 70% reduction of an organic model pollutant after 240 min. In addition, these membranes successfully removed Escherichia coli and other coliform bacteria in artificially inoculated water after 24 h of contact with them. Moreover, the stand-alone structure of the membranes allowed for the reusing of the immobilized catalyst. The experimental evidence indicated that developed nanofibre membranes are a fast and efficient solution for polluted water decontamination based on photocatalysis. Their use could contribute to guarantee a fresh water level and quality, mitigating the water scarcity problem worldwide.