Hydraulic Press
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Alternative vibro-dynamic compression processing of wood-cement composites using Amazonian wood
RESUMO Compósito madeira-cimento é um potencial material de construção para regiões tropicais, devido a suas propriedades físico-mecânicas e resistência ao ataque de fungos e podridão. Contudo, é importante testar métodos alternativos de produção e madeiras que sejam mais simples e baratos do que os tradicionalmente usados, para que se alcance u
Acta Amaz.. Publicado em: 2019-03
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2. Efecto de la adición de bentonita sobre las propiedades ópticas de diferentes materiales compuestos poliméricos
ABSTRACT In this work, composite materials were obtained by the incorporation of bentonite to biodegradable and synthetic polymeric matrices. Commercial (BE) and natural (BM) bentonite samples were employed, as well as three different polymeric matrices: thermoplastic corn starch (TPS), high density polyethylene (HDPE) and a poly(styrene-b-butadiene-b-styren
Matéria (Rio J.). Publicado em: 19/07/2018
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3. Película biodegradable de almidón de maíz termoplástico y quitosano con actividad antimicrobiana empleada como envase activo
ABSTRACT One of the research lines related to active packaging takes into account the incorporation of antimicrobial agents such as chitosan, a polysaccharide derived from the crustaceans’ exoskeleton. However, because of chitosan high molar mass, its diffusion from the package to the food surface is restricted, so the use of oligomers is an interesting bu
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Thermo-Mechanical Properties of P(HB-HV) Nanocomposites Reinforced by Nanodiamonds
Several studies of biodegradable polymers and copolymers have been carried for different applications in the biomedical area. This current study aims to develop a biocomposite to be used as an orthopedic device, using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) P(HB-HV), a biodegradable copolymer, with 94%HB and 6%HV, as matrix; and nanodiamonds (ND) with p
Mat. Res.. Publicado em: 26/06/2017
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5. Polyhydroxybutyrate Composites with Random Mats of Sisal and Coconut Fibers
Biodegradable polymeric composites using natural fibers have been investigated aiming to mitigate environmental impacts. In this paper, polyhydroxybutyrate (PHB) composites obtained using random mats of sisal and coconut fibers by compression molding in a hydraulic press, and the fiber content varied between 10% and 15% relative to the weight of the polymer.
Mat. Res.. Publicado em: 22/12/2016
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6. Obtention and characterization of coconut babassu derivatives
Babassu (Orbignya sp.) is a palm with extraordinary socioeconomic and ecologic importance found in humid tropical areas in Brazil, especially in frequently burned and degraded landscapes. There are several uses for babassu oil; however, its potential for providing other industrial products remains unexploited, due to the lack of scale and production structur
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-08
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7. Workability studies on Al+2.5%TiO2+Gr powder metallurgy composites during cold upsetting
Al+2.5%TiO2+Gr composites were synthesized through powder metallurgy technique and their workability behavior has been studied under tri-axial stress state condition. The powders were compacted using suitable punch and die in 400 kN hydraulic press and sintered at a temperature of about 590 ºC for a period of 3 hours in an electric muffle furnace. The sinte
Mat. Res.. Publicado em: 2014-12
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8. Evaluation of sugarcane laboratory ensiling and analysis techniques
The objective was to evaluate the effects of laboratory-silo type and method of silage extract production, respectively, on sugarcane silage fermentation and recovery of fermentation products. Sugarcane was mechanically harvested and ensiled in three different types of laboratory silos (five replicates): 9.7 × 30 cm PVC tubes with tight lids, equipped or un
R. Bras. Zootec.. Publicado em: 2014-04
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9. Effect of hydraulic head in the uniformity of irrigation and fertigation under drip system / Efeito da carga hidrÃulica na uniformidade da irrigaÃÃo e fertirrigaÃÃo em sistema de gotejamento
The irrigation tracked by gravity is a technique applied by the family farming that has been spread in Brazil and is used in social programs of some States or directly traded to producers. Irrigation systems have simplified management and let it cheaper. They intensify agricultural yield, increase the prospects of life in the countryside and, therefore, sett
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/02/2012
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10. Some aspects of barreling in sintered plain carbon steel powder metallurgy preforms during cold upsetting
The present research establishes a relationship of bulged diameter with densification and hydrostatic stress in forming of sintered iron (Fe) powder metallurgy preforms cold upset under two different frictional conditions, namely, nil/no and graphite lubricant condition. Sintered plain carbon steel cylindrical preforms with carbon (C) contents of 0, 0.35, 0.
Materials Research. Publicado em: 15/03/2012
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11. Caracterização de resíduos sólidos da construção civil para sua utilização em camadas drenantes de aterros sanitários / Characterization of construction waste for use as drainage materials in sanitary landfills
Intense population growth brings with it environmental concerns, since exploitation of natural resources, makes it essential to adopt recycling policies in order to achieve sustainable development. Therefore, this study sought to define a new application for recylcling construction and demolition waste (CDW-R). Two size distributions that could be readily pr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/11/2011
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12. Modelagem Computacional de Efeitos DinÃmicos de DissipaÃÃo de Energia em Transientes HidrÃulicos / Computational Modeling of Dynamic Effects of Energy Dissipation in Hydraulic Transients
Elevados nÃveis de pressÃo provocados pelo desligamento de bombas sÃo responsÃveis pelo elevado Ãndice de danos estruturais em adutoras. Um controle efetivo destas perdas requer um melhor dimensionamento do sistema ou dos dispositivos de atenuaÃÃo do golpe de arÃete. Esse ajuste depende das formulaÃÃes propostas para as equaÃÃes de continuidade e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/01/2011