Dip Coating
Mostrando 25-36 de 101 artigos, teses e dissertações.
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25. Effect of Tetraethoxy-silane (TEOS) Amounts on the Corrosion Prevention Properties of Siloxane-PMMA Hybrid Coatings on Galvanized Steel Substrates
Siloxane-poly(methyl methacrylate) (PMMA) organic-inorganic hybrid coatings were deposited on galvanized steel by the dip-coating sol-gel technique. Anticorrosion properties, as well as the morphological, surface and structural features were studied. Hybrid coatings were synthesized from tetraethoxy-silane (TEOS) and methyl methacrylate (MMA) as inorganic an
Mat. Res.. Publicado em: 04/12/2015
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26. The Effect of Ormosil Matrix Composition and Alkaline Earth Metal Doping on the Photochromic Response of Ormosil-Phosphotungstate Films
In this study, polyoxometallate based hybrid photochromic materials were prepared by incorporating phosphotungstate anion, PW12O403−, (PW) in hybrid tetraethyl orthosilicate and (3-glycidyloxypropyl)trimethoxysilane TEOS-GPTMS derived organomodified silicates (Ormosil) matrices by sol-gel method and the resulting materials were used to prepare multilayer f
J. Braz. Chem. Soc.. Publicado em: 2015-12
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27. Multilayer Graphene Films Obtained by Dip Coating Technique
A dip coating system was projected and constructed to deposit a large range of thin films onto solid substrates. A microcontroller was used to control the deposition system. As an example of application multilayer graphene (MLG) films were deposited onto glass slices in order to obtain conductive films with relatively good light transmittance. The MLG flakes
Mat. Res.. Publicado em: 2015-08
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28. Preparation and Characterization of PA66/Alumina Composite Membrane
In this study, polymer/ceramic composite membranes were prepared and characterized. The polymer used was polyamide 66 (PA66) deposited by dip coating on the inner surface of α-alumina-based (Al2O3) microporous tube. A coating on the ceramic support surface and the formation of the selective layer was analyzed by scanning electron microscopy (SEM) in membran
Mat. Res.. Publicado em: 2015-08
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29. New Sol-gel Formulations to Increase the Barrier Effect of a Protective Coating Against the Corrosion and Wear of Galvanized Steel
This study proposes a new pretreatment method that uses alkoxide precursors with a plasticizing agent; the purpose of this study is to improve the electrochemical and mechanical properties of a galvanized steel surface. Galvanized steel was covered with a hybrid film obtained from a sol that consisted of two alkoxide precursors, 3 - (trimethoxysilylpropyl) m
Mat. Res.. Publicado em: 2015-02
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30. Characterization of Siloxane-poly(methyl methacrylate) Hybrid Films Obtained on a Tinplate Substrate Modified by the Addition of Organic and Inorganic Acids
Tinplate is used to food packaging and other types of packages. The corrosion resistance of the tinplate has been study due the necessity of an alternative to high environmental impact of chromatization process. Therefore protective coatings as hybrid films base elaborations with different acids are studied to improve the barrier effect against corrosion. Th
Mat. Res.. Publicado em: 2015-02
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31. Heterojunction between Al2O3 and SnO2 thin films for application in transparent FET
Alternative materials for use in electronic devices have grown interest in the past recent years. In this paper, the heterojunction SnO2/Al2O3 is tested concerning its use as a transparent insulating layer for use in FETs. The alumina layer is obtained by thermal annealing of metallic Al layer, deposited by resistive evaporation technique. Combination of und
Mat. Res.. Publicado em: 09/09/2014
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32. Effect of curing temperature and architectural (monolayer and bilayer) of hybrid films modified with polyethylene glycol for the corrosion protection on tinplate
Hybrid films obtained by a sol-gel process are based on two important reactions: hydrolysis and condensation. The condensation reaction is influenced by the curing temperature, since it induces the development of the intrinsic properties of the gel. The aim of this work is to coat tinplate, a substrate widely used in the packaging industry, with monolayered
Mat. Res.. Publicado em: 28/07/2014
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33. Hybrid films with (trimethoxysilylpropyl) methacrylate (TMSM), poly (methyl methacrylate) PMMA and tetraethoxysilane (TEOS) applied on tinplate
The tetraethoxysilane (TEOS) influences morphological and electrochemical properties of hybrid films by function of concentration. Moreover, the use of acetic acid as a catalyst in the sol enables a more complete hydrolysis of the silane precursors due to the fact that the acetic acid goes through a more complete ionization when in aqueous solution. The aim
Mat. Res.. Publicado em: 27/05/2014
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34. Superfícies fotocatalíticas de titânia em substratos cerâmicos. Parte II: substratos, processos de deposição e tratamento térmico
Este trabalho corresponde à segunda parte da revisão das superfícies fotocatalíticas de titânia em substratos cerâmicos. Nesta parte, são descritos os principais fatores que influenciam na obtenção da fase anatase como: substrato, processos de deposição e tratamento térmico. Nos substratos que apresentam superfícies ásperas há uma maior efici�
Cerâmica. Publicado em: 2014-03
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35. Impregnação de catalisadores em suporte de espuma cerâmica de alumina
Este trabalho teve por objetivo avaliar a impregnação de diferentes catalisadores na superfície de um material cerâmico de alumina. Para a confecção do material cerâmico, foi utilizada a rota de processamento de espumas cerâmicas pelo método da réplica, no qual uma esponja de poliuretano com porosidade de 60 ppi foi mergulhada em uma suspensão de
Cerâmica. Publicado em: 2014-03
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36. Preparação e caracterização de pós e filmes finos de BaTiO3 sintetizados via método Pechini
Nos últimos anos o emprego do titanato de bário (BaTiO3) na indústria de cerâmicas tecnológicas e em dispositivos optoeletrônicos tem se incrementado em decorrência de suas propriedades ferroelétricas, termoelétricas, piezoelétricas e ópticas. O objetivo deste trabalho foi sintetizar e caracterizar pós e filmes finos amorfos de titanato de bário
Matéria (Rio J.). Publicado em: 2013-12