Dispersion De Material
Mostrando 1-12 de 83 artigos, teses e dissertações.
-
1. AVALIAÇÃO DE NANOTUBOS DE CARBONO FUNCIONALIZADOS VISANDO O DESENVOLVIMENTO DE MÉTODOS DE PRÉ-CONCENTRAÇÃO DE ÍONS METÁLICOS E DETERMINAÇÃO POR TÉCNICAS ESPECTROMÉTRICAS E ELETROANALÍTICAS
This review focuses on the use of functionalized carbon nanotubes (CNTs) on the development of preconcentration methods with substantial contributions on selectivity and sensitivity for metal ions determination. CNTs have been usually employed in the development of preconcentration/speciation coupled to spectroanalytical techniques for ions determination at
Quím. Nova. Publicado em: 2020-09
-
2. 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
-
3. Residuos de desmote de algodón aglomerados: su producción y aplicación en la construcción de viviendas
Abstract The feasibility of producing blocks and boards through the agglomeration of cotton ginnig process waste with calcium binders was proven in previous studies. This waste represents a serious problem for ginning plants, which annually produce a high amount of waste without final destination, as is the case in Argentina. The variability of the annual co
Ambient. constr.. Publicado em: 10/06/2019
-
4. Do Irrigation Solutions Influence the Bond Interface Between Glass Fiber Posts and Dentin?
Resumo O objetivo deste trabalho foi avaliar a resistência de união e permeabilidade da interface de pinos de fibra de vidro nos diferentes terços da dentina intrarradicular (cervical, médio e apical) submetidos a diferentes agentes irrigantes. Noventa dentes unirradiculares humanos foram submetidos ao tratamento endodôntico e foram divididos em cinco g
Braz. Dent. J.. Publicado em: 04/04/2019
-
5. Preparation, Characterization and Photostability of Nanocomposite Films Based on Poly(acrylic acid) and Montmorillonite
Polyacrylic acid (PAA)/clay mineral (SWy-1) nanocomposites were prepared by intercalation in solution and their photostability was evaluated. For the nanocomposite films containing 5, 10 and 20 wt % in SWy-1 mass occurred intercalation along with some clay exfoliation, while for PAA/30%SWy-1, the intercalation of PAA chains into the clay interlayers was obse
Mat. Res.. Publicado em: 07/05/2018
-
6. Cashew nut shell liquid, a valuable raw material for generating semiconductive polyaniline nanofibers
Abstract Cashew nut shell liquid (CNSL) is an abundant and renewable by-product of the cashew nut industry. It appears to be a valuable raw material for generating semiconductive polyaniline (PAni) nanomaterial with enhanced thermal stability and well-defined nanofiber morphology following a polymerization dispersion process. This study confirms that CNSL a
Polímeros. Publicado em: 15/03/2018
-
7. Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure
Individual carbon nanotubes (CNTs) exhibit excellent mechanical, electrical and thermal properties, leading to development of a new generation of advanced lightweight materials and spacecraft electronics substituting the electronics based on silicon. The direct assembly of CNTs into macroscopic fibers or sheets has been a way to overcome their dispersion and
Mat. Res.. Publicado em: 18/09/2017
-
8. Retention and Solute Transport Properties in Disturbed and Undisturbed Soil Samples
ABSTRACT Solute transport parameters can be determined in miscible displacement experiments, usually performed in columns with disturbed (sieved) soil samples. Experiments with undisturbed samples are uncommon, due to the difficulty of taking undisturbed samples at the size required for these experiments. Structural alteration of the disturbed material impli
Rev. Bras. Ciênc. Solo. Publicado em: 24/10/2016
-
9. ON THE SYNTHESIS OF MOLYBDENUM CARBIDE WITH COBALT ADDITION VIA GAS-SOLID REACTIONS IN A CH4/H2 ATMOSPHERE
Abstract Due to ever more severe environmental regulations regarding SOx, NOx and other pollutants' emissions, there has been an interest in developing new and improved catalysts for hydroprocessing reactions. Mo2C has been reported to display good selectivity and activity for those reactions, especially for HDS. Addition of another metal to the carbide stru
Braz. J. Chem. Eng.. Publicado em: 2016-09
-
10. Thermal, rheological and morphological properties of poly (Lactic Acid) (PLA) and talc composites
In this study, composites based on poly(lactic acid) (PLA)/talc were prepared at different compositions by melt mixing in a twin screw extruder. The effect of a nucleating agent, talc, on the crystallization behavior, rheological and morphological properties of PLA was investigated. DSC results showed that the addition of the mineral filler in the range betw
Polímeros. Publicado em: 27/05/2014
-
11. Influence of Ethylene Glycol on the Mullite Crystallization Processes Analyzed by Rietveld Refinement
ABSTRACT: Mullite is an excellent structural material due to its high temperature stability, high electrical insulation capabilities and creep resistance. This material has a number of technological applications, such as rocket nozzles used in the aerospace industry. In this work, mullite was obtained by sol-gel process, using silicic sol, aluminum nitrate a
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
-
12. Estudo dos riscos apresentados pelos radioisótopos após serem submetidos aos efeitos da detonação de um artefato explosivo / Study of risks presented by radioisotopes be submitted after the effects of detonation an explosive device
O presente trabalho tratou do estudo dos riscos apresentados pelos radioisótopos após serem submetidos aos efeitos da detonação de um artefato explosivo. O estudo permitiu a obtenção de dados baseados em pesquisas bibliográficas, documentais, cálculos e softwares, possibilitando análises das consequências resultantes de artefatos explosivos contend
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/08/2012