Thermal Isolation
Mostrando 1-12 de 72 artigos, teses e dissertações.
-
1. Rolling Contact Fatigue Life of Rail for Different Slip Conditions
Abstract A three-dimensional elastic-plastic finite element analysis (FEA) is carried out to estimate the rolling contact fatigue (RCF) crack initiation life for varied slip range on the rail arising from operational variations. The wheel load produces Hertzian contact pressure. Variation in engine traction induces slip variations that evolves thermal load i
Lat. Am. j. solids struct.. Publicado em: 2017-12
-
2. Cellulose Nanostructures Obtained from Waste Paper Industry: A Comparison of Acid and Mechanical Isolation Methods
The paper industry primary waste is usually deposited in landfills or incinerated. This material has a high content of lignocellulosic components, which could be converted to cellulose nanostructures (CNS). This study aimed to compare compositional (Fourier transform infrared spectroscopy), thermal (thermogravimetric analysis), morphological (scanning electr
Mat. Res.. Publicado em: 29/06/2017
-
3. A Study of the Thermal Runaway Phase Generated During Cyclic Loading of Viscoelastic Materials Accounting for the Prestress
Abstract The good damping performance and inherent stability of viscoelastic materials in relatively broad frequency bands, besides cost effectiveness, offers many possibilities for practical engineering applications. However, for viscoelastic dampers subjected to dynamic loadings superimposed on static preloads, especially when good isolation characteristic
Lat. Am. j. solids struct.. Publicado em: 2016-12
-
4. PF/CLAY hybrid materials: a simple method to modulate the optical properties
Abstract The aim of this work was modulate the emission properties and improve thermal stability of a conjugated polymer incorporated into an inorganic matrix. Hybrid material was prepared based on poly(9,9-dioctylfluorene-co-phenylene (PF) and montmorillonite (Na+Mt) clay using wet impregnation of 10, 30 and 50 wt.% of PF into Na+Mt and Na+Mt intercalated w
Polímeros. Publicado em: 15/03/2016
-
5. ISOLATION AND CHARACTERIZATION OF NANOFIBRILLATED CELLULOSE FROM OAT HULLS
The objectives of this work were to investigate the microstructure, crystallinity and thermal stability of nanofibrillated cellulose obtained from oat hulls using bleaching and acid hydrolysis at a mild temperature (45 ºC) followed by ultrasonication. The oat hulls were bleached with peracetic acid, and after bleaching, the compact structure around the cell
Quím. Nova. Publicado em: 2015-05
-
6. Main Degradation Products of Dabigatran Etexilate Evaluated by LC-UV and LC-ESI-MS, Degradation Kinetics and in vitro Cytotoxicity Studies
The present study reports the stability profile of an antithrombotic drug: dabigatran etexilate (DAB). The drug was subjected to thermal degradation at 60 ºC and products formed were investigated by liquid chromatography-UV (LC-UV) and liquid chromatography-mass spectrometry (LC-ESI-MS). Chromatographic separation of the degradation products was performed o
J. Braz. Chem. Soc.. Publicado em: 2015-04
-
7. Study and characterization of indium oxynitride photoconductors
Multifunctional materials are a new class of thin films and coatings. These materials show interesting characteristics for application in many scientific areas, in special electronic and photonic technologies. These characteristics include sensitivity for thermal, light, mechanical, chemical and other influences, high resistivity, high electrical isolation a
Mat. Res.. Publicado em: 03/12/2013
-
8. Desenvolvimento de material compósito a base de raspa de pneu e látex para isolamento térmico
A reciclagem tem sido muito estimulada pelo mercado. Já existem vários produtos que são produzidos com materiais reciclados e vários resíduos têm sido estudados nas mais diversas formas de aplicações. A grande maioria das aplicações de isolamento térmico em sistemas domésticos, comerciais e industriais na faixa de baixas e médias temperaturas (a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011
-
9. Stability evaluation of tocopheryl acetate and ascorbyl tetraisopalmitate in isolation and incorporated in cosmetic formulations using thermal analysis
Considerando o potencial antioxidante das vitaminas utilizadas em produtos cosméticos, seu uso na prevenção do processo de envelhecimento da pele e a necessidade de estudos de pré-formulação que garantam o desenvolvimento de cosméticos de qualidade, foi objetivo deste trabalho avaliar e comparar o comportamento térmico dos ativos acetato de tocoferil
Brazilian Journal of Pharmaceutical Sciences. Publicado em: 2010-03
-
10. Metodologia para desenvolvimento de projeto de fachacas leves. / Methodology to develop lightweight facade design.
The facades are considered one of the most relevant building subsystems, contributing both to building valuation and its performance, and has a great importance concerning the sustainability. In addition, its execution and maintenance costs are expressive when compared to others subsystems. Because of its economical and technical importance, the façade tech
Publicado em: 2009
-
11. Proposta de Complementação do Método de Avaliação da Exposição Ocupacional ao Calor: estudo de caso da atividade de manutenção de linhas energizadas
This thesis had the objective of proposing a complementation, with proactive character, to method and procedures of evaluation concerning occupational exposure to heat predicted in the norms NR-15/1978 and NHO 06/2002, respectively. The electricians of the maintenance team of energized lines at potential, in tension of 69 kV, from Companhia Energética de Al
Publicado em: 2009
-
12. ESTUDO DE ALVENARIAS E REVESTIMENTOS DE GESSO RECICLADO DESTINADO À HABITAÇÃO POPULAR / Study of masonry and Coatings made by Recycled plaster for low cost housing.
The generation of large quantities of solid waste is a great problem faced by urban areas. Like all building materials, the gypsum plaster is a generator of solid waste. The amount and inadequate waste disposal cause serious environmental, social and economical impacts. This requires the search for quick and effective solutions for its management, through th
Publicado em: 2008