Search
Now showing items 31-40 of 156
Produção, dispersão e consolidação de zircônia obtida a partir do tungstato de zircônio
(2016-05-11)
The aim of the present work is to explore the production, dispersion and consolidation of zirconia (zirconium oxide – ZrO2), in its hydrous form, obtained from zirconium tungstate (ZrW2O8) in alkaline medium using temperatures ...
Preparação, caracterização e aplicação de híbridos de montmorilonita-alginato-nanopratas na desinfecção de efluentes industriais para águas de reuso
(2015-03-04)
Different techniques have been developed to eliminate microorganisms from industrial wastewater and improve its final quality for reuse. Among them, the use of silver nanoparticles (AgNPs) anchored on montmorillonite (MMT) ...
Efeito da temperatura na estrutura físico-química de intercamadas depositadas a partir de HMDSO para adesão de DLC em aço
(2016-08-09)
Diamond-like carbon thin films (DLC) show a unique combination of properties such as high wear resistance and ultra-low friction. However, a widespread use regarding energy efficiency issues in the automobile industry is ...
Estudo da adsorção do corante azul de metileno por um resíduo sólido da indústria do suco de maça
(2016-07-22)
The development of new technologies for the treatment of wastewater containing dyes has generated a great interest in recent years, due to increase awareness about environmental preservation, in addition to the rigidity ...
Efeito da umidade no comportamento viscoelástico de misturas argila-rocha
(2016-08-29)
Drying is one of the most critical forming steps in the ceramic tile production. Usually defects such as cracks and surface distortion are produced in this processing step. One way to minimize these defects is to reduce ...
Desenvolvimento e caracterização de composições elastoméricos de EPDM com redução no teor de óxido de zinco
(2016-06-27)
Zinc oxide nanoparticle (nano ZnO) is a kind of inorganic multifunctional filler, which has extensive uses in rubber additives. Notably, most of relevant researches about nano ZnO focused on using them as a substitute of ...
Relaxação estrutural da fase amorfa do tungstato de zircônio
(2016-12-19)
Zirconium tungstate (ZrW2O8) is a ceramic material which exhibits several unusual properties such as negative thermal expansion, amorphization induced by high pressures ( 1.5 GPa and 2.0 GPa) and endothermic recrystallization ...
Preparação e caracterização de novos materiais híbridos a partir de (3-aminopropil) trimetoxisilano
(2016-10-17)
In this work, was investigated the obtaining of new materials from the hydrolysis and acid condensation reactions of (3-aminopropyl) trimethoxysilane, which resulted in the formation of hybrid nanostructures with ammoniums ...
Avaliação química, microestrutural e tribológica de filmes finos de TiCxNy produzidos por arco catódico para aplicações decorativas
(2016-11-24)
The deposition of thin films can be employed to modify and/or functionalize the properties of a material’s surface, improving wear resistance (tribological properties) or changing the resistivity (electrical properties). ...
Preparação e caracterização de revestimentos híbridos de poliuretano-ureia a partir de fontes renováveis
(2016-10-17)
Motivation of the work was to investigate the synthesis of polyols obtained from air induced oxidation of the commercial soybean oil and use these as precursors in the preparation of polyurethane-urea hybrid coatings. ...