DEMAT - Departamento de Engenharia de Materiais
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Article Avaliação da potencialidade de argilas do Rio Grande do Norte, Brasil. Parte-II: propriedades tecnológicas(Cerâmica Industrial, 2008) Dutra, Ricardo Peixoto Suassuna; Silva, Jaquelígia Brito da; Varela, Marcio Luiz; Nascimento, Rubens Maribondo do; Gomes, Uílame Umbelino; Paskocimas, Carlos AlbertoArticle Development of composite material from tire scrapes and latex for application in thermal insulation(Engenharia Térmica, 2009-12) Nascimento, Rubens Maribondo do; Ford, Elmo Thiago Lins Couras; Mendes, J. U. L.; Pereira, C. M. C.; Marques, A. T.Article Influência da gipsita no surgimento de eflorescência em telhas cerâmicas(Cerâmica Industrial, 2009-08) Nascimento, Rubens Maribondo do; Monteiro, Celina Margarida de Oliveira Lima; Martinelli, Antonio EduardoArticle Interfacial behavior of composites of recycled poly(ethyelene terephthalate) and sugarcane bagasse fiber(Elsevier, 2009-04) Ito, Edson Noriyuki; Corradini, Elisangela; Marconcini, José Manoel; Rios, Carlos Triveño; Agnelli, José Augusto Marcondes; Mattoso, Luiz Henrique CaparelliArticle Polyamide 66/Brazilian clay nanocomposites(Hindawi Publishing Corporation, 2009) Ito, Edson Noriyuki; Araújo, Edcleide Maria; Araújo, K. D.; Paz, Renê Anísio; Gouveia, R.; Barbosa, R.Article Structure and mechanical properties of polyamide 6/ Brazilian clay nanocomposites(FapUNIFESP (SciELO), 2009-06) Ito, Edson Noriyuki; Leite, Amanda Melissa Damião; Araujo, Edcleide Maria; Paz, Rene Anisio da; Pereira, Osanildo Damião; Lira, Hélio LucenaArticle Obtenção de membranas microporosas a partir de nanocompósitos de poliamida 6/argila nacional. Parte 1: influência da presença da argila na morfologia das membranas(ABM, ABC, ABPol, 2009) Ito, Edson Noriyuki; Leite, Amanda Melissa Damião; Araújo, Edcleide Maria; Barbosa, Renata; Lira, Hélio de LucenaPolymeric membranes were produced from nylon 6 nanocomposites and a clay using the immersion-precipitation technique. The clay was organically modified by using a quaternary ammonium salt, Dodigen. Nanocomposites were obtained from nylon 6 with untreated clay (MMT) and treated clay (OMMT). The nanocomposites were studied by XRD and TEM. The morphological structure consisted of an exfoliated and partially exfoliated clay layers in the polymeric matrix. The membranes were produced by phase inversion method and characterized by XRD and SEM. The X-ray diffraction of the membranes confirmed the results for the nanocomposites. The SEM image of the membrane top surface showed irregular pores. As for the membranes with the nanocomposites, a larger number of better distributed pores were observed, indicating that the presence of the clay altered the membrane morphology. The cross section SEM image showed an asymmetric morphology structure, comprising two layers, namely a skin with small and closed pores, and a porous layer with large, uniformly distributed poresArticle Nanocompósitos de polietileno/argila bentonita nacional: influência da argila e do agente compatibilizante PE-g-MA nas propriedades mecânicas e de inflamabilidade(Associação Brasileira de Polímeros, 2008-06) Ito, Edson Noriyuki; Brito, Gustavo F.; Oliveira, Amanda D. de; Araújo, Edcleide Maria; Melo, Tomas Jeferson Alves; Barbosa, RenataHigh density polyethylene/national bentonite clay nanocomposites were prepared with the melt intercalation technique. The effect of the clay without treatment and clay treated with quaternary ammonium salt Cetremide with polyethylene-graft-maleic anhydride as coupling agent was evaluated. The systems were characterized by flammability, mechanical and rheological properties, X ray diffraction and transmission electron microscopy. In general, the results of X ray diffraction and transmission electron microscopy showed partially exfoliated and/or intercalated structures with higher tensile modulus and torque value. The flammability test showed that the addition of clay in the polymer matrix and PE-g-MA reduced the burning rate, indicating an improved flammability resistance of the nanocomposites. In general, the system containing PE-g-MA coupling agent led to partially exfoliated nanocomposites with higher thermal stability than the high density polyethylene matrix. The polyethylene-graft-maleic anhydride promoted the exfoliation of clay and adhesion between matrix and filler, thus resulting in enhanced mechanical propertiesArticle Interfacial tension of PBT/SAN blends by the drop retraction method(ABM, ABC, ABPol, 2008-06) Ito, Edson Noriyuki; Ueki, Marcelo Massayoshi; Bretas, Rosario Elida Suman; Hage Junior, EliasArticle Evaluation of the zinox and zeolite materials as adsorbents to remove H2S from natural gas(Elsevier, 2006-01-05) Melo, Dulce Maria de Araújo; Melo, Marcus Antônio de Freitas; Martinelli, Antonio Eduardo; Cachima, Gustavo Henrique Bezerra; Cunha, Jardel Dantas da; Souza, José Roberto de