Silanization
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Surface Silanization of Graphene Oxide Under Mild Reaction Conditions
The functionalization of graphene oxide with organosilanes is an important strategy to yield graphene-silica composites as well as to create nanomaterials for use as reinforcement in polymer nanocomposites and corrosion-inhibiting coatings for metals, among other uses. However, depending on the reaction conditions used, the organosilanes tend to self-condens
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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2. ORGANOFILIZAÇÃO E SILANIZAÇÃO DE ARGILA BENTONITA
Clays have been used in several technological areas. One of the most usual applications is their incorporation into organic materials. Nonetheless, natural clays are hydrophobic being incompatible with organic medium. Clay organophilization can be reached by several methods such as by exchange of the interlayer sodium cations by organic cations, and by silan
Quím. Nova. Publicado em: 2018-02
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3. Influence of silane content and filler distribution on chemical-mechanical properties of resin composites
This study investigated the influence of silane concentration and filler size distribution on the chemical-mechanical properties of experimental composites. Experimental composites with silane contents of 0%, 1% and 3% (in relation to filler mass) and composites with mixtures of barium glass particles (median size = 0.4, 1 and 2 μm) and nanometric silica we
Braz. oral res.. Publicado em: 02/06/2015
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4. Heat treatment following surface silanization in rebonded tribochemical silica-coated ceramic brackets: shear bond strength analysis
OBJECTIVE: This study aimed to evaluate the effects of heat treatment on the tribochemical silica coating and silane surface conditioning and the bond strength of rebonded alumina monocrystalline brackets. MATERIAL AND METHODS: Sixty alumina monocrystalline brackets were randomly divided according to adhesive base surface treatments (n=20): Gc, no treatm
J. Appl. Oral Sci.. Publicado em: 2013-07
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5. Chemical treatment of the intra-canal dentin surface: a new approach to modify dentin hydrophobicity
Objective This study evaluated the hydrophobicity of dentin surfaces that were modified through chemical silanization with octadecyltrichlorosilane (OTS). Material and Methods An in vitro experimental study was performed using 40 human permanent incisors that were divided into the following two groups: non-silanized and silanized. The specimens were pretre
J. Appl. Oral Sci.. Publicado em: 2013-02
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6. COMPARAÇÃO DE DIFERENTES ENSAIOS MECÂNICOS PARA AVALIAR A RESISTÊNCIA ADESIVA A UMA CERÂMICA Y-TZP / COMPARISON OF DIFFERENTS MECHANICAL TESTS TO EVALUATE THE BOND STRENGTH TO A Y-TZP CERAMIC
This study aimed to evaluate the bond strength using different test types for bonding evaluation, between a yttrium tetragonal zirconia polycrystals (Y-TZP) ceramic and composite resin, considering two types of Y-TZP surface treatments. Three hundred and sixty Y-TZP blocks, received one of the two surface treatments (N= 180): UT- control (untreated) and SS-
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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7. Híbridos da montmorillonita-KSF contendo grupos alquiamina - Sintese, caracterização e aplicações adsortivas
A montmorillonita-KSF sódica (KSF-Na+) foi organicamente modificada por reações de intercalação, silanização e troca iônica utilizando aminas e silanos aminados. Os diversos sólidos foram caracterizados pelas técnicas de difratometria de raio-X, espectroscopia na região do infravermelho, análise elementar (CHN), termogravimetria, microscopia elet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/11/2011
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8. Effects of silica coating and silane surface conditioning on the bond strength of rebonded metal and ceramic brackets
OBJECTIVE: The aim of this study was to evaluate the effects of tribochemical silica coating and silane surface conditioning on the bond strength of rebonded metal and ceramic brackets. MATERIAL AND METHODS: Twenty debonded metal and 20 debonded ceramic brackets were randomly assigned to receive one of the following surface treatments (n=10 for each group):
Journal of Applied Oral Science. Publicado em: 2011-06
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9. Avaliação da resistência de união de um cimento resinoso a um filme vitrocerâmico depositado em superfície de Y-TZP / Evaluation of bond strength of a resin cement to ceramic film deposited on a surface Y-TZP
The use of Y-TZP for dental ceramics strengthening has expanded significantly its mechanical properties, allowing its use in various clinical situations such as intraradicular, crowns, fixed partial dentures and implants. With the development of these new ceramic systems the use of traditional methods for surface treatment have been observed to be ineffectiv
Publicado em: 2010
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10. Análise mecânica de retentores intra-radiculares / Mechanical analysis of endodontic post
The fiber-reinforcement composite (FRC) posts introduced the new concept of restorative system, in which the various components of the reconstruction: post, cement, filling material and dentin have now become a complex mechanically homogeneous. The knowledge of the structure, composition and physical properties of these fiber posts systems is important in or
Publicado em: 2010
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11. Estudo de variaveis que atuam no processo de cimentação de restaurações ceramicas : atenuação da luz, modos de ativação e tratamento superficial / Study of variables that act in the luting process of ceramic restorations : light attenuation, activation mode, and surface treatment
The durability of ceramic restoration depends of factors like the conversion degree of a luting agent and the interaction of this luting agent with the ceramic internal surface. These in vitro studies evaluate: (1) the influence of different ceramics and the effect of different activation modes on Knoop Hardness Number (KHN) of a dual agent luting, immediate
Publicado em: 2008
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12. Detecção piezelétrica não-gravimétrica de boro empregando cristal de quartzo com eletrodo separado e superfície quimicamente modificada / Non-gravimetric piezoelectric detection of boron by using quartz crystal with electrode separated and chemically modified surface
Piezoelectric quartz crystals (PQCs) with electrode-separated configuration and chemically modified surface were used to develop a boron sensor. A detection cell was built in such a way that a stainless-steel electrode was held at a short distance (0.3 mm) from the PQC surface, whose original gold electrode was removed. By using impedance spectroscopy, oscil
Publicado em: 2003