Fibrous Composites
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Nondestructive characterization of epoxy matrix composites reinforced with Luffa lignocellulosic fibers
ABSTRACT Luffa Cylindrica is a tropical plant from the Cucurbitaceae family, whose fruit becomes very fibrous when fully ripened. The lignocellulosic sponges of Luffa can be suitable for use as reinforcement of epoxy matrix composites, because they have a morphology with spatial 3-D arrangement as well as are eco-friendly materials (biodegradable, and high a
Matéria (Rio J.). Publicado em: 20/07/2017
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2. Transverse permeability determination and influence in resin flow through an orthotropic medium in the RTM process
ABSTRACT Resin Transfer Molding (RTM) process is commonly used to produce high quality polymeric composites with simple or complex geometries in small to large sizes. In RTM process a preformed reinforcement is positioned inside the mold cavity. This dry reinforcement is actually a fibrous porous media whereby resin will flow. The mold is then closed and res
Matéria (Rio J.). Publicado em: 20/07/2017
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3. Studies on thermal and viscoelastic properties of vinyl ester resin and its composites with glass fiber
Vinyl ester resins are widely used in sandwich composite structures. Because of their good resistance to chemicals, flexibility and easy processing, these sandwich are extensively applied in the marine sector. These composites are typically manufactured by liquid molding processes, especially infusion. In this study, RTM light was used to inject the polymeri
Matéria (Rio J.). Publicado em: 2015-03
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4. In Vitro Biological Evaluation of 3-D Hydroxyapatite/Collagen (50/50 wt. (%)) Scaffolds
Hydroxyapatite-collagen (HA/Col) composites are potential scaffolds for bone tissue engineering. In this work, three-dimensional (3-D) HA/Col (50/50 wt. (%)) scaffolds were synthesized using a self-assembly method and cross-linked with a 0.125% glutaraldehyde solution. Scaffolds were evaluated in vitro by cytotoxicity testing using MC3T3 cells; proliferation
Materials Research. Publicado em: 22/12/2011
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5. OBTENÇÃO E CARACTERIZAÇÃO DE NANOCOMPÓSITOS À BASE DE POLIHIDROXIALCANOATO/ATAPULGITA / EXTRACTION AND CHARACTERIZATION OF NANOCOMPOSITES BASED ON POLYHYDROXYALKANOATE / ATTAPULGITE
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) PHBV is a biodegradable polyester produced by various microorganisms, which has been studied as an option for the production of disposable items in place of polymers derived from petroleum, thus contributing to the preservation of the environment. However, this thermoplastic has some disadvantages that limit its u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2010
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6. Production and evaluation of recycled polymers from açaí fibers
The possibility of recycling and the favorable mechanical properties of the products have encouraged the study and production of thermoplastic composites from natural fibrous waste. Açaí (cabbage palm) fiber, which is removed from the seed, has been slightly investigated, as compared to what is already known about the fruit pulp. In this study, the influen
Materials Research. Publicado em: 2010-06
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7. EXTRACTION AND CHARACTERIZATION OF NANOCOMPOSITES BASED ON POLYHYDROXYALKANOATE / ATTAPULGITE / OBTENÇÃO E CARACTERIZAÇÃO DE NANOCOMPÓSITOS À BASE DE POLIHIDROXIALCANOATO/ATAPULGITA
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) PHBV is a biodegradable polyester produced by various microorganisms, which has been studied as an option for the production of disposable items in place of polymers derived from petroleum, thus contributing to the preservation of the environment. However, this thermoplastic has some disadvantages that limit its u
Publicado em: 2010
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8. Utilização de pozolanas em compósitos de cimento reforçados com fibras de celulose e PVA. / Pozzolan utilization in cement composites reinforced with celullose and PVA fibers.
Composites reinforced with natural fibers are a good asbestos fibercomposites replacement material, as a result of the great natural fiber avaibility such as coco nut, sisal and cellulose. Durability aspects need to be improved, like the decrease of fiber resistance in alkaline environment causing the loss of mechanical properties of the composites. An alter
Publicado em: 2006
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9. UMA FORMULAÇÃO DE ELEMENTOS FINITOS AXISSIMÉTRICOS PARA ANÁLISE DE TUBOS LAMINADOS EM MATERIAIS COMPÓSITOS / AN AXISYMMETRIC FINITE ELEMENT FORMULATION FOR THE ANALYSIS OF LAMINATED COMPOSITE TUBES
The use of composite materials in structures has grown in the engineering practice due to its characteristics, of high strength, low density and a good stability to thermal effects. A class of composites, the fibrous laminates, is generally used in tubes subjected to many types of loadings as internal and/or external pressure, traction, torsion, temperatures
Publicado em: 2006
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10. Natural rubber: leather composites
Leather is a fibrous protein consisting of collagen in a three dimensionally crosslinked network. Chrome tanning of leather improves the appearance of leather but at the same time emits both solid and liquid chrome leather wastes. Scrap rubber recycling using untreated and neutralized leather fibrous particles in natural rubber has been studied. Vulcanizatio
Polímeros. Publicado em: 2005-06
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11. Chapa de media densidade (MDF) fabricada com poliuretana mono-componente derivada de oleo de mamona - caracterização por metodo destrutivo e por ultra-som / Medium density fiberboard manufactured with polyurethane derived from castor oil - characterization of destructive and nondestructive testing
While employing low cost reforestation lumber, the technologies of the fabrication of fiber plates denominated ?Medium Density Fiberboard? (MDF) offer to several industrial sectors the opportunity to aggregate worth to species with little or no commercial interest, opening to them the possibility of promising profitable investments. However, the phenolic res
Publicado em: 2003
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12. Estudo de um composito de matriz de aluminio reforçado copm fibras de AL/AL IND.2 O IND.3 obtido pela reação entre o aluminio e fibras silicosas
This investigation describes the research for obtaining metallic composites with fibrous ceramic reinforcement into an aluminum matrix, through the variation of the technique known as Reactive Infiltratíon. The fibers were incorporated into the aluminum matrix by using cold uniaxiai pressing or hot extruding processes of a mixture of aluminum particles and
Publicado em: 2000