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Previous issue date: 2015-12-18 / Com o surgimento de novas tecnologias, tem crescido a necessidade de utiliza??o de novos materiais, e com isso tem se intensificado pesquisas sobre a obten??o e utiliza??o de materiais provenientes de fontes renov?veis, seja para reduzir os custos de produ??o e/ou impacto ambiental. Nesse contexto, verificou-se que a bainha da palha do coqueiro pode ser aproveitada como mat?ria-prima para a produ??o de um comp?sito que pode ser utilizado como isolante t?rmico e ac?stico. Depois de selecionadas as bainhas do coqueiro foram submetidas a tratamento com solu??o aquosa com 2% de hidr?xido de s?dio (NaOH). O comp?sito mencionado foi produzido com bainha do coqueiro e l?tex natural, com percentuais de bainha nas propor??es 15%, 25% e 35% do volume total do composto. As propriedades f?sico-mec?nicas avaliadas foram: Densidade, Absor??o de ?gua, Teor de Umidade, Microscopia Eletr?nica, Dureza Shore e Resist?ncia ? Tra??o. Al?m dos par?metros j? mencionados, foram determinadas a Condutividade T?rmica, Difusividade T?rmica, Resistividade T?rmica, Calor Espec?fico, Inflamabilidade, bem como a Isola??o Ac?stica, proporcionada pelo comp?sito em estudo. As an?lises foram fundamentadas em normas ABNT, ASTM e UL. Diante dos resultados obtidos, pode-se concluir que o comp?sito produzido a partir da bainha do coqueiro pode ser utilizado como isolamento t?rmico e ac?stico. Com isso, d?-se um fim mais nobre a este material, que na maioria das vezes ? queimado ou descartado inadequadamente no meio ambiente. / With the emergence of new technologies, has grown the need to use new materials, and this
has intensified research on the collection and use of materials from renewable sources, is to
reduce production costs and / or environmental impact. In this context, it was found that the
sheath coconut straw, can be utilized as raw material for the production of a eco-composite
that can be used as a thermal and acoustic insulator. After selected from the coconut sheaths
were subjected to treatment with aqueous 2 % sodium hydroxide (NaOH). The composite
study was produced with the sheath and coconut natural latex, with coconut sheath percentage
in the proportions 15%, 25% and 35% of the total compound volume. Physical, thermal and
acoustic properties of the composites were analyzed in order to obtain data on the use of
viability as thermoacoustic insulation. The CP15 composites, CP25 and CP35 showed thermal
conductivity 0.188 W/m.K, 0.155 W/m.K and 0.150 W/m.K, respectively. It can be applied as
thermal insulation in hot systems to 200 ? C. The CP35 composite was more efficient as a
thermal and acoustic insulation, providing 20% noise reduction, 31% and 34% for frequencies
of 1 kHz, 2 kHz and 4 kHz, respectively. The analyzes were based on ABNT, ASTM, UL.
Based on these results, it can be concluded that the eco-composite produced the hem of
coconut can be used as thermal and acoustic insulation. Thus, it gives a more noble end to this
material, which most often is burned or disposed of improperly in the environment.
Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20874 |
Date | 18 December 2015 |
Creators | Souza Filho, Jos? Ribeiro de |
Contributors | 12391085400, http://lattes.cnpq.br/7103009428184656, Souza, Luiz Guilherme Meira de, 25094955420, http://lattes.cnpq.br/0801747108308706, Silva, K?sia Karina de Oliveira Souto, 00851738435, http://lattes.cnpq.br/4712628443097348, Farias, Aline Cristina Mendes de, 01222704447, http://lattes.cnpq.br/9603161534939649, Santos, Natanaeyfle Randemberg Gomes dos, 03047568499, http://lattes.cnpq.br/0174046631340409, Mendes, Jos? Ubiragi de Lima |
Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
Source Sets | IBICT Brazilian ETDs |
Language | Portuguese |
Detected Language | English |
Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
Rights | info:eu-repo/semantics/openAccess |
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