Buscar
Itens para a visualização no momento 51-60 of 130
Caracterização, tratamento e viabilidade de aplicação de argilas provenientes de resíduos de extração de areia na área cosmética
(2017-05-23)
Clays are natural, earthy, fine-grained materials that exhibit plasticity in contact with water. The applicability of the clays in the cosmetic area depends on their chemical and mineralogical composition, but these materials ...
Remoção de compostos nitrogenados de água utilizando processos de separação por membranas
(2018-08-22)
The presence of nitrogen compounds in their different oxidation states is an indicator of contamination of water resources and possible unsatisfactory sanitary conditions for the population that consumes this water. Nitrite ...
Desenvolvimento e caracterização mecânica e dinâmico-mecânica de compósitos poliméricos híbridos (vidro/ramie) moldados por transferência de resina
(2014-07-10)
The use of ramie fibers as reinforcement in polymer composites is justified considering their satisfactory mechanical properties in comparison with other natural fibers, and their hybridization with synthetic fibers can ...
Influência da geometria sobre o rendimento de bocais injetores de turbinas tesla no escoamento compressível supersônico
(2014-07-10)
Nozzles with convergent-divergent geometry are designed and manufactured for the establishment of supersonic flows. The main objective of this work is to verify the variation of isentropic efficiency depending on the ...
Estudo e secagem de argila vermelha utilizando um sensor magnetoelástico
(2015-02-20)
An important application of magnetoelastic sensors is in antitheft systems. Because of their excellent performance and their passive wireless nature, they have also been extensively used in environmental sensing of changes ...
Determinação da espessura de camadas duras em aços por técnicas magnéticas
(2014-07-10)
The process most commonly used for surface hardening of steels is annealing. Using conventional thermal treatments, hardened layers were formed on SAE 1020 and SAE 8620 steel by diffusion of carbon into the surface. The ...
Desenvolvimento de tintas em pó ignífugas à base de resina acrílica com adição das argilas montmorilonita e mica moscovita
(2015-12-08)
The powder coatings are gaining market share because they are environmentally friendly, solvent-free and solid components. Protection is one of its main features to avoid direct action of aggressive agents. Because they ...
Compósitos de poliestireno e poliestireno expandido reciclado reforçado com fibras de curauá : propriedades e degradação
(2014-07-10)
The use of vegetable fibers as a reinforcing filler in polymer composites is receiving increased attention because of the good properties obtained in the final material and they are able to substitute conventional fillers ...
Avaliação comparativa de revestimento de conversão à base de cério para embalagens de folhas flandres empregadas na indústria de alimentos
(2015-02-23)
The metal food packages provide a barrier to the action of the environment and the preservation of nutrients and organoleptic quality of the packaged product. Several studies are being conducted aiming for environmentally ...