Nanofillers
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Obtaining and characterizing dental hybrid composites with clay or silica nanoparticles and boron-aluminum-silicate glass microparticles
Abstract The aim of the present work was the obtaining and characterization of dental hybrid composites using nanoparticles (clay or silica) and boron-aluminum-silicate microparticles. We evaluated the dispersion of the nanofillers when changing their loading among 2.5%, 5%, 10% and 25% wt. Were tested, in the above quantities, four different types of nanofi
Polímeros. Publicado em: 27/06/2019
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2. Harmonious interaction of incorporating CNTs and zeolitic imidazole frameworks into polysulfone to prepare high performance MMMs for CO 2 separation from humidified post combustion gases
Abstract Multi-walled carbon nanotubes (CNTs) and zeolitic imidazole frameworks (ZIF-301) were synergistically incorporated into glassy polysulfone (PSF) to prepare mixed-matrix membranes (MMMs) to separate CO2 from post combustion flue gas. The flexible MMMs rendering consistent distribution and improved adhesion of nanofillers with the polymer matrix were
Braz. J. Chem. Eng.. Publicado em: 2018-01
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3. Multifunctional Nanocomposites between Different Carbon Nanostructures and Styrene Acrylic Latex
This work describes the preparation, characterization and properties study of multifunctional nanocomposites between poly(styrene-co -butyl acrylate) latex and different carbon nanostructures: iron-filled carbon nanotubes (CNT), graphene or graphene oxide. Different approaches were employed to prepare stable aqueous dispersions of these nanostructures, accor
J. Braz. Chem. Soc.. Publicado em: 2017-08
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4. Influence of different fillers on the properties of an experimental vinyl polysiloxane
Abstract The aim of the study was to evaluate the effect of the incorporation of different fillers on an experimental vinyl polysiloxane (VPS) at two different concentrations, 20% and 40%. Different fillers were added to an experimental VPS. The study was developed in two stages: (i) incorporation of fillers in different concentrations: (a) 20 wt% fillers, a
Braz. oral res.. Publicado em: 28/03/2016
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5. The use of atomic force microscopy as an important technique to analyze the dispersion of nanometric fillers and morphology in nanocomposites and polymer blends based on elastomers
AFM has been recognized as one of the most powerful tools for the analysis of surface morphologies because it creates three-dimensional images at angstrom and nano scale. This technique has been exhaustively used in the analyses of dispersion of nanometric components in nanocomposites and in polymer blends, because of the easiness of sample preparation and l
Polímeros. Publicado em: 2014-12
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6. Nanocomposite of photocurable epoxy-acrylate resin and carbon nanotubes: dynamic-mechanical, thermal and tribological properties
In this study, the thermal, dynamic-mechanical and tribological behavior of nanocomposites of a photocurable epoxy-acrylate resin and multiwalled carbon nanotubes (MWCNT) are investigated. A route consisting of a combination of sonication, mechanical and magnetic stirring is used to disperse 0.25-0.75 wt. (%) MWCNT into the resin. Two photocuring cycles usin
Mat. Res.. Publicado em: 11/12/2012
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7. Inorganic-organic hybrids based on poly (ε-Caprolactone) and silica oxide and characterization by relaxometry applying low-field NMR
Poly (ε-caprolactone) (PCL) based hybrids containing different amounts of modified (Aerosil® R972) and unmodified (Aerosil® A200) silica oxide were prepared employing the solution method, using chloroform. The relationships of the amount of nanofillers, organic coating, molecular structure and intermolecular interaction of the hybrid materials were invest
Mat. Res.. Publicado em: 25/09/2012
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8. Propriedades mecânicas e resistência da união de resinas compostas com matriz de silorano ou com nanopartículas / Mechanical properties and bond strength of composite resins with silorane matrix or nanofillers
O objetivo neste estudo foi analisar as propriedades mecânicas (microdureza, resistência coesiva, rugosidade e perda de massa por abrasão) e a resistência da união entre dente/restauração de diferentes resinas compostas. Para os testes de resistência da união e micro-dureza, trinta incisivos bovinos foram usados para três grupos experimentais (n=10
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2011
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9. The Effects of ZnO2 nanoparticles on strength assessments and water permeability of concrete in different curing media
In this study, the effect of limewater on strength assessments and percentage of water absorption of concrete incorporating ZnO2 nanoparticles has been investigated. Portland cement was partially replaced by ZnO2 nanoparticles with the average particle size of 15 nm and the specimens were cured in water and saturated limewater for specific ages. The results
Materials Research. Publicado em: 20/05/2011
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10. Nanocomposites for food packaging applications.
2009
Food Research International. Publicado em: 2011
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11. Resistência à degradação biológica, química e mecânica de materiais resinosos nanoparticulados / Resistance to degradation biological, chemical and mechanical resin materials nanofillers
O avanço da Odontologia Estética tem sido impulsionado pela introdução de novos materiais restauradores, tais como os nanoparticulados, os quais têm demonstrado bom desempenho mecânico e excelentes propriedades ópticas. Entretanto, deve-se considerar que os materiais restauradores estão constantemente sujeitos aos desafios térmicos, mecânicos e qu�
Publicado em: 2011
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12. Nanocompósitos de borracha nitrílica com argilas montmoriloníticas e bentonitas / nonoonono
The search for new materials has been a constant in the humanity history. However, there are no plans to replace elastomers, even in long term, due to their unique mechanical properties. Among the various types of elastomers used nowadays, Nitrile Butadiene Rubber - NBR is a choice when one wants a material with good mechanical properties and excellent resis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2010