Search
Now showing items 431-440 of 453
Tribological Performance of a Paraffinic Base Oil Additive with Coated and Uncoated SiO2 Nanoparticles
(MDPI, 2024-04-25)
Electric vehicles (EVs) have emerged as a technology that can replace internal combustion vehicles and reduce greenhouse gas emissions. Therefore, it is necessary to develop novel low-viscosity lubricants that can serve ...
Graphene-based versus alumina supports on CO2 methanation using lanthanum-promoted nickel catalysts
(Springer Nature, 2024-05)
The valorization of CO2 as a biofuel, transforming it through methanation as part of the power-to-gas (P2G) process, will allow the reduction of the net emissions of this gas to the atmosphere. Catalysts with 13 wt.% of ...
Caracterización y estudio de la reactividad de extractos tánicos condensados e hidrolizables. Análisis de las propiedades físico-químicas y mecánicas de resinas fenólicas de tipo novolaca modificadas con dichos extractos
(Servicio Editorial de la Universidad del País Vasco/Euskal Herriko Unibertsitatearen Argitalpen Zerbitzua, 2007-03-01)
La comercialización y uso de las resinas fenólicas está siendo sometido afortunadamente a cada vez más estrictos controles medioambientales debido a la presencia de fracciones de fenol y formaldehído remanente en las piezas ...
Sodium Manganese Ferrite Water Splitting Cycle: Unravelling the Effect of Solid–Liquid Interfaces in Molten Alkali Carbonates
(ACS, 2024-06)
In this work, the Na2CO3 of the sodium manganese ferrite thermochemical cycle was substituted by different eutectic or eutectoid alkali carbonate mixtures. Substituting Na2CO3 with the eutectoid (Li0.07Na0.93)2CO3 mixture ...
Valorization of White Grape Pomace: Integral Strategies for Advanced Applications
(2023-12-19)
Sustainable agricultural waste management is crucial to supply increasing food demands. Grape pomace from Txakoli wine production poses environmental issues, but the circular economy is emerging as a solution to minimize ...
Reversible optical storage properties of nanostructured epoxy-based thermosets modified with azobenzene units
(ACS, 2011-11-22)
Azo-containing polymers are of particular interest in the design of materials for applications in optical recording. The aim of this contribution was the synthesis and characterization of optically active epoxy-based ...
Enhanced stability of photo-induced anisotropy due to intermolecular interactions in an azo-prepolymer confined in block copolymer
(Elsevier, 2013-02-08)
Many efforts in the field of azobenzene-containing polymers are concentrated on exploring new material concepts to obtain efficient and stable photo-induced anisotropy. Here, an easy approach to improve the birefringent ...
Thermo-responsive properties of self-healable thermosets based on epoxidized soybean oil
(Elsevier, 2024-01-26)
In this work, epoxidized soybean oil (ESO) based thermosetting materials cured with citric acid (CA) and modified with low molecular weight 4′-(hexyloxy)-4-biphenyl-carbonitrile (HOBC) nematic liquid crystal were synthesised ...
Modelización fotoquímica optimizada aplicada a la comprensión de los episodos de ozono troposférico en el Atlántico-Sur europeo
(2021-07-07)
Más del 98% de la población europea está expuesta a niveles nocivos de ozono troposférico según la OMS. En el Sur de Europa, la situación es todavía más grave debido a que, las mayores temperaturas y horas de luz solar que ...
Effect of Different Compatibilizers on the Properties of Green Low-Density Polyethylene Composites Reinforced with Bambusa Vulgaris Bamboo Fibers
(MDPI, 2024-06-21)
Low-density green polyethylene (LDGPE) composites reinforced with 5 wt% of bamboo fiber and 3 wt% of a compatibilizing agent (polyethylene grafted with maleic anhydride and tannin) were processed through extrusion and ...