Showing papers by "Eduardo Radovanovic published in 2013"
TL;DR: In this article, a double-four-ring (D4R) zeolite A structure was obtained without phase contamination using sugarcane bagasse as silica source under hydrothermal condition at 80°C for 72-160h.
75 citations
TL;DR: In this paper, the authors presented an alternative for recycling of a quite common food packaging kind, which contains polyethylene (PE), aluminum and poly(ethylene terephthalate) (PET) as a multilayer film.
Abstract: Different properties, such as barriers to gas, light, flavor and water vapor, as well as flexibility, are necessary for the production of food packages. These properties may be obtained by combining different polymers. In spite of the advantages achieved with the use of multilayer films, the recycling process of such material is a challenging task. This study presents an alternative for recycling of a quite common food packaging kind, which contains polyethylene (PE), aluminum and poly(ethylene terephthalate) (PET) as a multilayer film. The multilayer packages were delaminated with acetone. PET was depolymerized by ethanol in supercritical conditions. The diethyl terephthalate (DET) was obtained as the main product, presenting high purity and yield of 80%. Also, metallic aluminum was obtained by the PET-depolymerizing process. The optimal reaction time was 120 min. The products were characterized by FTIR, 1 H NMR and 13 C NMR spectroscopies, DSC and TGA.
52 citations
TL;DR: In this paper, a co-precipitation approach of Fe 2+ and Fe 3+ ions in a basified aqueous solution followed by a surface treatment was used to coat synthesized nanoparticles with silanes of different functional groups for further treatment with ethylenediamine.
23 citations
TL;DR: In this paper, a factorial design (mixture design) was used to analyze the hardness and degree of monomer conversion into composites containing conventional monomers and an organic-inorganic hybrid polymer-based methacryloyloxypropyl trimethoxysilane (MEMO).
Abstract: This paper presents a factorial design (mixture design) used to analyze the hardness and degree of monomer conversion into composites containing conventional monomers and an organic-inorganic hybrid polymer-based methacryloyloxypropyl trimethoxysilane (MEMO). For this purpose, resins (composites with SiO
9 citations