Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico

Thinking about the growing search for materials than can improve the efficiency of thermal insulations, and that do not cause aggressions to the environment, we decided to use the leaf of the carnauba as an alternative reinforcement in composites of thermal insulation. The composite is formed by nat...

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Autore principale: Costa, Luciano Leonardo Lopes
Altri autori: Mendes, José Ubiragi de Lima
Natura: Dissertação
Lingua:por
Pubblicazione: Universidade Federal do Rio Grande do Norte
Soggetti:
Fibra natural
Isolate térmico
Compósito
CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
Accesso online:https://repositorio.ufrn.br/jspui/handle/123456789/20442
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spelling ri-123456789-204422017-11-03T01:54:58Z Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico Costa, Luciano Leonardo Lopes Mendes, José Ubiragi de Lima http://lattes.cnpq.br/9825822186177505 http://lattes.cnpq.br/7103009428184656 Souza, Luiz Guilherme Meira de http://lattes.cnpq.br/0801747108308706 Santos, Natanaeyfle Randemberg Gomes dos http://lattes.cnpq.br/0174046631340409 Fibra natural Isolate térmico Compósito CNPQ::ENGENHARIAS::ENGENHARIA MECANICA Thinking about the growing search for materials than can improve the efficiency of thermal insulations, and that do not cause aggressions to the environment, we decided to use the leaf of the carnauba as an alternative reinforcement in composites of thermal insulation. The composite is formed by natural fibers of leaves of the carnauba, that possesses good physicochemical properties to work as a thermal insulation and the minerium caulim, that is characterized for being chemical inert and possesses low thermal conductivity. The carnaúba straw acquired was-covered with impurities, it was subjected to various washing processes for these impurities do not interfere in the tests, the caulimwas used without any treatment for their processing. After cleaning, the straw was milled in a knife mill to be in the form of powder, this powder was mixed with kaolin to be more homogeneous, the mixture was properly hydrated and pressed to make specimenfor testing.The composite was divided into formulations of 10%, 30% and 50%, this value indicates the percentage of the fiber mass of the carnauba powderper total mass of the composite, after that, the specimens were manufactured by the pressing method. The specimens have been tested to determine conductivity, resistance, diffusivity. Analyses of thermogravimetry, x-ray diffraction, x-ray fluorescence were done, and a compression test to determine whether it could be used in wall cladding. The composite showed satisfactory results in their thermal characteristics, the composite showed satisfactory results in their thermal characteristics , with an operating range of up to 150 ° C and an average thermal conductivity of 0.199 W /m.K and quite feasible in the item cost-effective, but somewhat limited by their place of application. Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Tendo em vista a crescente busca por materiais que possam cada vez mais melhorar a eficiência de isolantes térmicos e que não causem agressão ao meio ambiente, temos a utilização da palha da carnaúba como uma alternativa de reforço em compósitos de isolação térmica. O compósito é formado por fibras naturais da folha da carnaúba que possui propriedades físico-químicas desejáveis para ser utilizado como isolante térmico e o minério Caulim, que se caracteriza por ser quimicamente inerte e possuir baixa condutividade térmica. O compósito citado foi submetido a ensaios para determinar a sua condutividade térmica, densidade e resistência à temperatura. As propriedades físicas, estruturais e morfológicas das matérias-primas foram investigadas através de análises de termogravimetria, difração de raios X, fluorescência de raios X e microscopia eletrônica de varredura. 2016-05-12T23:35:09Z 2016-05-12T23:35:09Z 2015-08-12 masterThesis COSTA, Luciano Leonardo Lopes. Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico. 2015. 78f. Dissertação (Mestrado em Engenharia Mecânica) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2015. https://repositorio.ufrn.br/jspui/handle/123456789/20442 por Acesso Aberto application/pdf Universidade Federal do Rio Grande do Norte Brasil UFRN PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA MECÂNICA
institution Repositório Institucional
collection RI - UFRN
language por
topic Fibra natural
Isolate térmico
Compósito
CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
spellingShingle Fibra natural
Isolate térmico
Compósito
CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
Costa, Luciano Leonardo Lopes
Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico
description Thinking about the growing search for materials than can improve the efficiency of thermal insulations, and that do not cause aggressions to the environment, we decided to use the leaf of the carnauba as an alternative reinforcement in composites of thermal insulation. The composite is formed by natural fibers of leaves of the carnauba, that possesses good physicochemical properties to work as a thermal insulation and the minerium caulim, that is characterized for being chemical inert and possesses low thermal conductivity. The carnaúba straw acquired was-covered with impurities, it was subjected to various washing processes for these impurities do not interfere in the tests, the caulimwas used without any treatment for their processing. After cleaning, the straw was milled in a knife mill to be in the form of powder, this powder was mixed with kaolin to be more homogeneous, the mixture was properly hydrated and pressed to make specimenfor testing.The composite was divided into formulations of 10%, 30% and 50%, this value indicates the percentage of the fiber mass of the carnauba powderper total mass of the composite, after that, the specimens were manufactured by the pressing method. The specimens have been tested to determine conductivity, resistance, diffusivity. Analyses of thermogravimetry, x-ray diffraction, x-ray fluorescence were done, and a compression test to determine whether it could be used in wall cladding. The composite showed satisfactory results in their thermal characteristics, the composite showed satisfactory results in their thermal characteristics , with an operating range of up to 150 ° C and an average thermal conductivity of 0.199 W /m.K and quite feasible in the item cost-effective, but somewhat limited by their place of application.
author2 Mendes, José Ubiragi de Lima
author_facet Mendes, José Ubiragi de Lima
Costa, Luciano Leonardo Lopes
format masterThesis
author Costa, Luciano Leonardo Lopes
author_sort Costa, Luciano Leonardo Lopes
title Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico
title_short Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico
title_full Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico
title_fullStr Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico
title_full_unstemmed Obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico
title_sort obtenção e caracterização de compósito a base de caulim e pó da palha de carnaúba como isolante térmico
publisher Universidade Federal do Rio Grande do Norte
publishDate 2016
url https://repositorio.ufrn.br/jspui/handle/123456789/20442
work_keys_str_mv AT costalucianoleonardolopes obtencaoecaracterizacaodecompositoabasedecaulimepodapalhadecarnaubacomoisolantetermico
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