72 documents found, page 1 of 8
Technological Properties of Medium Density Particleboards Produced with Peanut ...
Brito,Flávia Maria Silva; Silva,Bianca Andrade; Carvalho,Iara Marques de; Baúti,Sofia Baldoni; Mendes,Lourival Marin; Guimarães Júnior,José BeneditoAbstract Peanut crop waste (hulls), which have a chemical composition similar to wood, can be considered as a source of industrial raw material for the production of particleboard, provided that they are of similar quality to wooden panels. The present study aimed to produce and evaluate the physical and mechanical properties of medium density particleboards made of peanut hulls and pine wood particles bonded w...
Produção e caracterização de compósitos à base de gesso reforçado com partícula...
Veloso,Maria Cecíllia Ramos de Araújo; Villela,Luciana Silva; Mesquita Júnior,Laércio; Valle,Mara Lúcia Agostini; Mendes,Lourival MarinRESUMO Este trabalho teve como objetivo produzir e caracterizar compósitos à base de gesso reforçados com partículas de resíduo de cacau como forma de agregar valor a esse subproduto agrícola e criar um material inovador. Para a produção dos compósitos foram utilizados gesso fino para fundição e partículas de resíduo de cacau. As proporções de reforço inseridas foram de 0,0%; 2,5%; 5,0%; 7,5% e 10,0% em substit...
Potencial de utilização do resíduo de soja como carga em polietileno de baixa d...
Santos,Thalita Paula dos; Garcia,Hudson Venâncio Silva; Lopes,Thaynara Andrade; Santos,Carolina Aparecida dos; Furtini,Ana Carolina CorrêaRESUMO O descarte inadequado de polímeros de origem petrolífera contribui para o aumento da poluição ambiental devido ao grande período de tempo que estes materiais levam para degradar. Assim, o desenvolvimento de materiais poliméricos reforçados com resíduos de materiais lignocelulósicos pode proporcionar uma melhor taxa de biodegradação ao polímero, por se tratar de materiais de origem natural, renovável e bi...
Particleboards produced with different proportions of Hevea brasiliensis: Resid...
Faria,Douglas Lamounier; Eugênio,Tony Matheus Carvalho; Lopes,Daiane Erika; Protásio,Thiago de Paula; Mendes,Lourival MarinABSTRACT The use of the Hevea brasiliensis tree in latex rubber production has resulted in a consolidated role of this tree in the Brazilian economy. However, at the end of the productive cycle of the tree that lasts for approximately 25 years, the timber resulting from this venture has no added value and is usually used for the production of firewood. In order to introduce this species into the furniture and c...
Valorization of wood shavings waste for the production of wood particulate comp...
Faria,Douglas Lamounier; Lopes,Thamirys Andrade; Mendes,Lourival Marin; Guimarães Júnior,José BeneditoABSTRACT The aim of this work was to evaluate the physical and mechanical properties of particleboards using particles from wood shaving at three urea-formaldehyde adhesive contents: 6, 9 and 12% (dry mass basis). The particleboards were produced with nominal density of 0.70 g.cm-3, pressing cycle with temperature of 160 °C, pressure of 3.92 MPa and time of 8 minutes. The properties of water absorption (WA), th...
Static bending of glulam beams manufactured with rubber wood and epoxy adhesive
Faria,Douglas Lamounier; Lopes,Thamirys Andrade; Scatolino,Mário Vanoli; Soriano,Julio; Mendes,Lourival Marin; Guimarães Júnior,José BeneditoABSTRACT The aim of this study was to evaluate the properties of Hevea brasiliensis wood wastes for production structural pieces of glued laminated (glulam) timber. Three trees with age close to 25 years and diameter at breast height (DBH) higher than 500 mm were obtained. The basic density of the wood were quantified, as well as the stiffness and the strength in static bending, shear strength and parallel comp...
Desempenho físico-mecânico de compósitos à base de gesso reforçados com embalag...
Villela,Luciana Silva; Castro,Eliziane Denize de; Mesquita Júnior,Laércio; Veloso,Maria Cecillia Ramos de Araújo; Mendes,Rafael FarinassiRESUMO As embalagens multicamadas são utilizadas por um período de tempo bastante curto gerando um volume de descarte elevado. Por serem formadas por diferentes materiais devido suas diversas camadas, sua reciclagem é dificultada. Sendo assim, são importantes novas aplicações para essas embalagens pós-consumo, como por exemplo o seu reaproveitamento em compósitos. Neste contexto, o objetivo deste trabalho foi d...
STUDYING THE GRAMMAGE IN LVL PANELS GLUED WITH CASTOR OIL-BASED POLYURETHANE AD...
Faria,Douglas Lamounier; Lopes,Thamirys Andrade; Scatolino,Mario Vanoli; Protásio,Thiago de Paula; Nascimento,Maria Fátima doABSTRACT Efforts have been done in order to decrease the human dependence on petroleum materials. This idea can be applied for wood adhesives and wood products. This study proposes to evaluate laminated veneer lumber (LVL) panels of Hevea brasiliensis produced with castor oil-based polyurethane and resorcinol formaldehyde in different grammages. Six rubber tree (12 years old) with diameters at breast height (DB...
Physical and mechanical behavior of glulam beams produced with rubberwood treat...
Faria,Douglas Lamounier; Cruz,Thiago Moreira; Dias,Matheus Cordazzo; Duarte,Paulo Junio; Mendes,Lourival Marin; Guimarães Junior,José BeneditoABSTRACT This work aimed to evaluate the physical and mechanical behavior of glued laminated timber (GLT) - glulam pieces of Hevea brasiliensis treated with chromed copper arsenate (CCA), chromed copper borate (CCB) and pyrethroid in the production of GLT. The pieces were produced using three wooden laminae with dimensions of 60 x 20 x 1200 mm, (width x thickness x length), joined with epoxy adhesive under 1.0 ...
THE EFFECT OF CELLULOSE NANOCRYSTALS IN SUGARCANE BAGASSE PARTICLEBOARDS OF PIT...
Mesquita,Ricardo Gabriel de Almeida; Sanadi,Anand Ramesh; Marconcini,José Manoel; Correa,Ana Carolina; César,Antônia Amanda da SilvaABSTRACT The aim of this research was to investigate sugarcane bagasse (SCB) particleboards, using two kinds of particles, from pith and fibers, reinforced with cellulose nanocrystals (NCC). The NCCs were dispersed in the adhesive urea formaldehyde (UF) using a sonificator in two proportions (0 and 1%). The NCCs and UF were applied in the SCB particles using a rotary blender. The particleboards were produced in...