Óptimo aprovechamiento de las sesiones de laboratorio

[EN] This paper shows the teaching experience applied to the laboratory sessions of the subject of Science and Technology of Materials that is taught in the second year of the degrees of Electrical Engineering, Mechanical Engineering and Industrial Technologies Engineering in the Universitat Jaume I. The purpose of this experience is to facilitate the learning of the basic theoretical knowledge related to laboratory practice to develop and to make the students aware of the importance of preparing the practice prior to its development. This has been done by developing and using means or transmission formats of the contents to know before the practice which are more attractive and visual than the existing practice script[ES] En este trabajo se muestra la experiencia docente aplicada a las sesiones de laboratorio de la asignatura de Ciencia y Tecnología de Materiales que se imparte en segundo curso de los grados de Ingeniería Eléctrica, Mecánica y en Tecnologías Industriales en la Universitat Jaume I. El propósito de esta experiencia es facilitar el aprendizaje de los conocimientos teóricos básicos relacionados con la práctica de laboratorio a desarrollar y sensibilizar a los alumnos sobre la importancia de preparar la práctica previamente a su desarrollo. Esto se ha realizado mediante el desarrollo y uso de medios o formatos de trasmisión de los contenidos a conocer previamente a la práctica que sean más atractivos y visuales que el guion de prácticas existente actualmente.Gonzalez Ausejo, J.; Oliver Valls, R.; Gámez Pérez, J.; Cabedo Mas, L. (2017). Óptimo aprovechamiento de las sesiones de laboratorio. En In-Red 2017. III Congreso Nacional de innovación educativa y de docencia en red. Editorial Universitat Politècnica de València. 157-165. https://doi.org/10.4995/INRED2017.2017.6823OCS15716

Three-dimensional printing of PLA and PLA/PHA dumbbell-shaped specimens of crisscross and transverse patterns as promising materials in emerging application areas: Prediction study

This is an accepted manuscript of an article published by Elsevier in Polymer degradation and stability on 18/08/2018, available online: https://doi.org/10.1016/j.polymdegradstab.2018.08.008 The accepted version of the publication may differ from the final published version.This paper presents ex-ante examination of advanced polymer materials to detect defects and define and minimize the potential failure of novel polymer products before they arise. The effect of build directions on the properties of dumbbell-shaped specimens obtained by three-dimensional printing from polylactide and polylactide/polyhydroxyalkanoate commercial filaments was investigated, as well as the hydrolytic degradation of these specimens at 50 ºC and 70 ºC. Taking into account previous studies, we have found further dependences of the properties of 3D printed species before and during abiotic degradation from the orientation of printing. The initial assumption that only the contact time with the 3D printer platform leads to an increase in the crystalline phase during printing turned out to be insufficient. Further investigations of individual parts of the dumbbell-shaped specimens showed that the size of the specimens’ surface in contact with the platform also affected the structural ordering of the material

A comparative study of three-dimensional printing directions: The degradation and toxicological profile of a PLA/PHA blend

The use of biobased plastics is of great importance for many applications. Blending thermoplastic polylactide (PLA) with polyhydroxyalkanoate (PHA) enables the formulation of a more mechanically powerful material and this enables tailored biodegradation properties. In this study we demonstrate the 3D printing of a PLA/PHA blend as a potential candidate for biocompatible material applications. The filament for 3D printing consisted of PHA, which contains predominantly 3-hydroxybutyrate units and a small amount of 3-hydroxyvalerate units, as revealed by multistage mass spectrometry (ESI-MSn). This research found that the properties of 3D printed species before and during abiotic degradation are dependent on printing orientation. Furthermore, the 3D printed specimens exhibited good biocompatibility with HEK293 cells, indicating real promise as biological scaffolds for tissue engineering applications