Encontrados 2 documentos, a visualizar página 1 de 1
Insights into optimized synthesis conditions of hollow microspheres of silica f...
Santos, Bianca Ferreira dos; Cecilia, Juan Antonio; Bastos Neto, Moisés; Rodríguez-Castellón, Enrique; Azevedo, Diana Cristina Silva deHollow microspheres of silica were synthesized with different ethanol/water ratios (0.4, 1.0, 2.0 and 6.0) to assess the influence of this parameter on the morphology/porosity of the samples and thus on their water adsorption capacity. The samples were characterized by N2 at 77 K and CO2 at 273 K adsorption isotherms, scanning electron microscopy, transmission electron microscopy and water vapor isotherms at 29...
An overview of the biolubricant production process: challenges and future persp...
Cecilia, Juan Antonio; Plata, Daniel Ballesteros; Saboya, Rosana Maria Alves; Luna, Francisco Murilo Tavares de; Cavalcante Júnior, Célio LoureiroThe term biolubricant applies to all lubricants that are easily biodegradable and non-toxic to humans and the environment. The uses of biolubricant are still very limited when compared to those of mineral oils, although this trend is increasing and depends on investment in research and development (R&D). The increase in demand for biodegradable lubricants is related to the evolution of environmental regulations...