Prepara????o e caracteriza????o de comp??sito h??brido juta e nanotubo de carbono em matriz de polipropileno

Autor: Ferreira, Greiciele da Silva
Přispěvatelé: Macedo Neto, Jos?? Costa de, Kimura, Solenise Pinto Rodrigues, Guedes, Ana Em??lia Diniz Silva
Jazyk: portugalština
Rok vydání: 2019
Předmět:
Zdroj: Biblioteca Digital de Teses e Dissertações da UFAM
Universidade Federal do Amazonas (UFAM)
instacron:UFAM
Popis: Submitted by greiciele ferreira (greycy.espiritosanto@gmail.com) on 2020-11-04T15:28:56Z No. of bitstreams: 4 CartaEncaminhamentoAutodep??sito.pdf: 71676 bytes, checksum: f7e1b60097737ef49035b5db844c6f83 (MD5) Ata de Defesa de Disserta????o_Oficial.pdf: 239477 bytes, checksum: 2bc491f4fa2a3b33d2f19959cca80414 (MD5) FICHA CATALOGR??FICA.pdf: 1922 bytes, checksum: d09fb1b2904987788eb242ad3c80df0f (MD5) DISSERTA????O REVIS??O COMPLETA. 3doc.pdf: 1758235 bytes, checksum: 14e53c057655a669586b1ca488c6d2f4 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2020-11-04T18:28:00Z (GMT) No. of bitstreams: 4 CartaEncaminhamentoAutodep??sito.pdf: 71676 bytes, checksum: f7e1b60097737ef49035b5db844c6f83 (MD5) Ata de Defesa de Disserta????o_Oficial.pdf: 239477 bytes, checksum: 2bc491f4fa2a3b33d2f19959cca80414 (MD5) FICHA CATALOGR??FICA.pdf: 1922 bytes, checksum: d09fb1b2904987788eb242ad3c80df0f (MD5) DISSERTA????O REVIS??O COMPLETA. 3doc.pdf: 1758235 bytes, checksum: 14e53c057655a669586b1ca488c6d2f4 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-11-05T13:41:45Z (GMT) No. of bitstreams: 4 CartaEncaminhamentoAutodep??sito.pdf: 71676 bytes, checksum: f7e1b60097737ef49035b5db844c6f83 (MD5) Ata de Defesa de Disserta????o_Oficial.pdf: 239477 bytes, checksum: 2bc491f4fa2a3b33d2f19959cca80414 (MD5) FICHA CATALOGR??FICA.pdf: 1922 bytes, checksum: d09fb1b2904987788eb242ad3c80df0f (MD5) DISSERTA????O REVIS??O COMPLETA. 3doc.pdf: 1758235 bytes, checksum: 14e53c057655a669586b1ca488c6d2f4 (MD5) Made available in DSpace on 2020-11-05T13:41:45Z (GMT). No. of bitstreams: 4 CartaEncaminhamentoAutodep??sito.pdf: 71676 bytes, checksum: f7e1b60097737ef49035b5db844c6f83 (MD5) Ata de Defesa de Disserta????o_Oficial.pdf: 239477 bytes, checksum: 2bc491f4fa2a3b33d2f19959cca80414 (MD5) FICHA CATALOGR??FICA.pdf: 1922 bytes, checksum: d09fb1b2904987788eb242ad3c80df0f (MD5) DISSERTA????O REVIS??O COMPLETA. 3doc.pdf: 1758235 bytes, checksum: 14e53c057655a669586b1ca488c6d2f4 (MD5) Previous issue date: 2019-11-04 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas The development of polymeric hybrid composite materials using synthetic and natural compounds as reinforcement is growing and has been occupying several market segments, due to the low cost of fibers, and the fact that they have good mechanical properties, in contrast, carbon nanotubes have a high cost, however, diversified features allow it to have a range of applications. In this research, hybrid composites were developed from jute fiber and carbon nanotube in a polypropylene matrix. To obtain the specimen, jute fiber was incorporated into the polymeric matrix at 9.09%, and then extruded and injected, while the carbon nanotube (NTC) was mixed at 0.5% together with the pellets. J / PP (Jute / Polypropylene) then Injected. The mechanical properties of these materials were studied through standardized tests of tensile strength and impact resistance. The addition of fibers to the polypropylene matrix provided an increase in maximum strength and elongation, respectively, of approximately 2.14% and 0.4%, compared to the hybrid composite J / PP / NTC (jute / polypropylene / carbon nanotube), however in the modulus of elasticity there was a decrease of 44% in relation to the hybrid (J / PP / NTC). When comparing the impact resistance values of the composite (J / PP) with the hybrid (J / PP / NTC) there was an increase of 4.48% for the hybrid. Jute (J / PP) and Hybrid (J / PP / NTC) composites were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (MET), Fourier Transform Infrared Radiation (RITF), Spectroscopy of X-ray Dispersive Energy (EEDR), Thermogravimetric Analysis (ATG), Differential Scanning Calorimetry (CED), these characterizations were performed in order to obtain elements that indicate changes in morphology, as well as differences in matrix structures, which influence temperatures important processing and the connection bands corresponding to each element (Jute, Polypropylene, Carbon Nanotube). The results obtained demonstrate the influence of the insertion of Jute fiber and carbon nanotube on the mechanical properties and suggest an industrial application of the final product. O desenvolvimento de materiais comp??sitos h??bridos polim??ricos utilizado compostos sint??ticos e naturais como refor??o ?? cresente e vem ocupando diversos segmentos de mercado, devido ao baixo custo das fibras, e o fato de possu??rem boas propriedades mec??nicas, em contra partida, os nanotubos de carbono possuem um custo elevado, no entando, caracter??sticas diversificadas permitem que ele tenha uma gama de aplica??oes. Nesta pesquisa foram desenvolvidos comp??sitos h??bridos a partir da fibra de juta e nanotubo de carbono em uma matriz de polipropileno. Para a obten????o do corpo de prova a fibra de juta foi incorporada na matriz polim??rica a 9,09%, e em seguida extrudada e Injetada, enquanto que o nanotubo de carbono (NTC) foi misturado a 0,5% junto com os peletes de J/PP (Juta/Polipropileno) em seguida Injetado. As propriedades mec??nicas destes materiais foram estudadas atrav??s de ensaios normalizados de resist??ncia ?? tra????o, e resist??ncia ao impacto. A adi????o das fibras ?? matriz de polipropileno proporcionou um aumento na Resist??ncia m??xima e Alongamento respectivamente de aproximadamente 2,14% e 0,4%, comparado com o comp??sito h??brido J/PP/NTC ( juta/ polipropileno/ nanotubo de carbono), entretanto no m??dulo de elasticidade houve uma diminui????o de 44% em rela????o ao h??brido (J/PP/NTC). Quando comparadas os valores de resist??ncia ao impacto do comp??sito (J/PP) com o h??brido (J/PP/NTC) houve um aumento de 4,48% para o h??brido. Os comp??sitos de juta (J/PP) e H??bridos (J/PP/NTC) foram caracterizados por Microscopia Eletr??nica de Varredura ( MEV), Microscopia de Eletr??nica de Transmiss??o (MET), Radia????o Infravermelho por Transformada de Fourier (RITF), Espectroscopia de Energia Dispersiva de Raios X (EEDR), An??lise Termogravim??trica (ATG), Calorimetria Explorat??ria Diferencial (CED), essas caracteriza????es foram realizadas de modo a obter elementos que indiquem mudan??as na morfologia, como tamb??m as diferen??as nas estruturas da matriz, que influ??ncia em temperaturas importante de processamento e as bandas de liga????es correspondente a cada elemento (Juta, Polipropileno, Nanotubo de carbono). Os resultados obtidos demonstram a influ??ncia da inser????o da fibra de Juta e do nanotubo de carbono sobre as propriedades mec??nicas e sugere uma aplica????o industrial do produto final.
Databáze: OpenAIRE
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