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A adsorção de tióis monitorados pelo método de voltametria cíclica com uso de eletrodos de ouro
(2019-08-15)
In this work, the application of amorphous magnetoelastic alloy coated with gold by magnetron sputtering and electroless methods is demonstrated. The thickness, delamination, and roughness evaluations of the gold coatings ...
Influência do inibidor de pré-vulcanização nas propriedades de composições de borracha natural não vulcanizadas
(2019-12-16)
Vulcanization is a crosslinking process in which the chemical structure of the elastomer is changed by the interlinking of the long chains of the polymer, resulting in a three-dimensional network. The tire repairing industry ...
Preparação e caracterização de membranas de polisulfona-poliuretano para recuperação de água de processos têxteis industriais simulados
(2021-03-12)
Techniques using membranes for the treatment of wastewater usually promote higher quality of treated water when compared to other processes. Among them, pervaporation has advantages in terms of selectivity, in addition to ...
Desenvolvimento de bandas de rodagem com menor resistência ao rolamento e menor impacto ambiental
(2016-12-01)
The tire industry is in constant development in order to make its products safer, more durable, ecologic and energy saving. To achieve these objectives, improvements in the properties of abrasion resistance, wet grip and ...
Metodologia para a determinação das propriedades mecânicas de compósitos de poliamida 6.6 reforçados por fibras de vidro longas através da simulação de injeção
(2017-12-20)
The use of long glass fiber-reinforced thermoplastic composites has increased considerably in the last years. However, the mechanical properties of these materials are strongly dependent on their microstructure (orientation ...
Entendimento químico da adesão de filmes de carbono amorfo em ligas ferrosas por meio de intercamadas contendo silício
(2021-07-29)
Diamond-like Carbon films (DLC) films, despite research being developed over four decades, have restricted industrial use and prevent massive application in recent years due to the low adhesion of this material to ferrous ...
Poliuretanos fotoativos como estratégia de prevenção à resistência bacteriana
(2022-08-11)
Quantum carbon dots (CQDs) are amorphous carbon nanoparticles that have specific functionalities, among them, the fluorescence emission at particular wavelengths and the production of singlet oxygen (1O2). However, due to ...
Influência da radiação no comportamento de atrito de filmes finos de dióxido de titânio: fototribologia
(2022-08-17)
In dry sliding of two surfaces, the friction force depends on the pair of materials and the contact conditions. If the material and operating conditions remain unchanged, the friction force is constant. Techniques for ...
Composições elastoméricas reforçadas com fibras para o revestimento de superfícies metálicas
(2023-02-15)
The usage of elastomeric materials for pipeline coating realizes a technic to protect the metallic materials, mainly against abrasion wear. The rubber layer must be sufficiently resistant to friction caused by the passage ...