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Now showing items 11-20 of 26
New composite materials based on nanochitin and essential oils
(2021-06-22)
En los últimos años, el aislamiento de la quitina, que es el segundo polímero natural más abundante después de la celulosa, a partir de residuos de cáscaras de crustáceos ha generado un gran interés para su aplicación en ...
Utilisation de la diatomite Tunisienne naturelle et modifiée pour l’élimination des polluants organiques et inorganiques d’un milieu aqueux
(2020-10-02)
La pollution de l’environnement, principalement celle de l’eau, par les substances chimiques organiques et inorganiques est un majeur problème qui menace notre santé d’une façon directe ou indirecte. Cette pollution est ...
Application des huiles essentielles dans le domaine des embalages alimentaires.
(2020-02-29)
The overall objective of this work was to study the suitability of Poly Lactic Acid (PLA) and starch containing natural agents, as active packaging. For this, we chose several natural actives substances such as essential ...
Déterpénation de l'huile essentielle d'Origanum majorana L. et évaluation desd activités biologiques
(2020-02-28)
The purpose of this work is the study of the deterpenation of the Origanum Majorana essential oil, and the evaluation of the effect of this treatment on the biological efficiency of this volatile component. The aerial part ...
A new route towards lignin-based polyols: a highway for lignin exploitation
(2020-12-18)
El aumento del uso de productos de base petroquímica, junto con el agotamiento del petróleo y la mayor preocupación de la industria y la sociedad por la situación medioambiental actual, ha dado lugar a una intensa investigación ...
Integrated hydrometallurgical process for Paval valorization.
(2020-11-12)
Esta tesis doctoral propone un proceso integrado para la valorización de residuos de la producción secundaria de aluminio (Paval de escoria salina) a través de la reducción de su contenido en flúor y minimizando la consecuente ...
Desarrollo de materiales poliméricos híbridos (caucho EPDM-SMC) sin uso de adhesivos.
(2021-03-03)
El objetivo de esta tesis es mejorar la adherencia entre el SMC (Sheet Moulding Compound) y el caucho EPDM (Etileno Propileno Dieno tipo M), sin necesidad de adicionar productos intermedios, como primers o adhesivos, antes ...
Design, synthesis and characterization of inks based in waterborne polyurethane urea dispersions suitable for direct ink writing 3D-printing.
(2020-12-09)
A series of waterborne polyurethane urea dispersions were prepared to study their viability as inks for direct ink writing 3D-printing. In this context, waterborne polyurethane urea dispersions were successfully synthesized ...
Design and Characterization of Waterborne Polyurethane-Urea based Nanocomposites for 3D Printing
(2021-12-09)
Polyurethane-ureas are very versatile polymers that can be process in many ways and used in an extremely wide field of applications. At the same time, 3D printing offers the opportunity to make one on one personalized ...
Modelling chemical weathering in contrasted watersheds: new implementations and application at the global scale
(2020-10-16)
[EN]The biogeochemical cycles describe the matter and energy flux between ecosystems in the Earth System. However, climate change, human population growth and other global change hazards alter the natural balance of these ...