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Chemical treatment of banana tree pseudostem particles aiming the production of particleboards Ciência e Agrotecnologia
Guimarães,Bárbara Maria Ribeiro; Mendes,Lourival Marin; Tonoli,Gustavo Henrique Denzin; Bufalino,Lina; Mendes,Rafael Farinassi; Guimarães Junior,José Benedito.
Brazil is one of the major banana producers in the world, and consequently generates a great amount of residues from this crop, which could be utilized in particleboard production. The present work aimed to evaluate the effect of different chemical treatments of the particles of Musa sp. pseudostem, on their chemical and physical properties (basic density), and on the physical and mechanical properties of the particleboards produced with the same material. Five treatments were applied to the particles: 1) without treatment (control); 2) 2% acetic acid; 3) 0.5% NaOH; 4) acetone (1/1 in volume/volume); and 5) water. Panels with medium density were produced (0.70 g/cm³), bonded with 12% (in relation to the particle mass) of urea-formaldehyde adhesive. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Musa sp.; Lignocellulosic residues; Chemical treatments.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100005
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Thermal performance of sisal fiber-cement roofing tiles for rural constructions Scientia Agricola
Tonoli,Gustavo Henrique Denzin; Santos,Sérgio Francisco dos; Rabi,José Antonio; Santos,Wilson Nunes dos; Savastano Junior,Holmer.
Roofing provides the main protection against direct solar radiation in animal housing. Appropriate thermal properties of roofing materials tend to improve the thermal comfort in the inner ambient. Nonasbestos fiber-cement roofing components reinforced with cellulose pulp from sisal (Agave sisalana) were produced by slurry and dewatering techniques, with an optional addition of polypropylene fibers. Nonasbestos tiles were evaluated and compared with commercially available asbestos-cement sheets and ceramic tiles (frequently chosen as roofing materials for animal housing). Thermal conductivity and thermal diffusivity of tiles were determined by the parallel hot-wire method, along with the evaluation of the downside surface temperature. Cement-based...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cellulose pulp; Polypropylene fiber; Thermal comfort; Parallel hot-wire method; Thermal conductivity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100001
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