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Itens para a visualização no momento 21-28 of 28
Avaliação das técnicas de dispersão mecânica e ultrassônica de nanotubos de carbono de paredes múltiplas em resina epóxi
(2014-06-03)
In this study nanotubes/epoxy composites were produced in order to evaluate which of the two studied techniques would result in a better degree of dispersion and unentanglement of carbon nanotubes in epoxy resin. The ...
Fotossensibilizadores nanoestruturados por sistema camada por camada
(2014-06-05)
The search for materials that can be modified at molecular level has been the subject of several studies worldwide. Thus, the production techniques of thin films stand out due to the possibility of reducing costs and ...
Caracterização magnética de aço com a superfície endurecida
(2014-06-03)
This work investigates the magnetic properties (hysteresis loop and Barkhausen noise) in some steels (ABNT 1045, 1050 and 1548) whose surfaces had been hardened by induction. The goal was to develop a non-destructive test ...
Deposição de filmes finos de nitreto de zircônio para aplicação em biomateriais
(2014-06-04)
Zirconium nitride (ZrN) nanometric films were deposited onto different substrates, in order to study the surface microstructure and also to investigate the electrochemical behavior to obtain a better composition that ...
Caracterização de membranas de poliamida 66 preparadas pelo método de inversão de fases
(2014-06-04)
In the present study, polyamide 66 (PA 66) membranes were prepared by phase inversion (PI) and characterized in order to verify their potential application in separation processes. PA 66 membranes were prepared using two ...
Utilização de um adsorvente natural para remoção de pireno em meio aquoso
(2014-06-05)
In this study, two peat samples (one decomposed DP, and another fibrous FP) were characterized by several instrumental techniques, including scanning electron microscopy (SEM), elemental analysis (CHNS), thermogravimetric ...
Estudo das propriedades magnéticas e estruturais de (Nd, Pr) FeB nanocristalino com adição de TiC e Cr
(2014-05-30)
The addition of both Ti and Cr-C refine the grains in nanocomposites of Nd-Fe-B, increasing substantially the coercive field Hc . This motived our investigation of the effect of the addition of Ti-C and Cr to nanocomposites ...
Blendas a base de biopolímeros para liberação controlada de agroquímicos
(2014-05-29)
The incorporation and encapsulation of fertilizers in polymers blends are methods that can be used to reduce losses and to minimize environmental pollution. In this work, blends of Soy Protein Isolate (SPI) and Polylactide ...