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Título : Use of coffee plant stem in the production of conventional particleboards
Autor: César, Antônia Amanda da Silva
Bufalino, Lina
Macedo, Laurenn Borges de
Mesquita, Ricardo Gabriel de Almeida
Protásio, Thiago de Paula
Mendes, Lourival Marin
Palavras-chave: Agricultural residues
Coffea arabica L.
Resistance properties
Aglomerados convencionais
Resíduos agrícolas
Café - Propriedades de resistência
Publicador: Trans Tech Publications Ltd.
Data da publicação: Mar-2014
Referência: CÉSAR, A. A. da S. et al. Use of coffee plant stem in the production of conventional particleboards. Key Engineering Materials, Kapellweg, v. 600, p. 703-708, Mar. 2014.
Abstract: When the productivity of a coffee plantation drops considerably, the crop must be renewed. In this case, the removed plants become residues to be discarded. This work aimed to verify the utilization of the coffee plant stem in the production of conventional particleboards. The basic density and chemical composition of the coffee stem was obtained. 3 particleboards were produced with urea-formaldehyde at 6% and paraffin at 1%. The target density of the panels was 0.600 g/cm3. The pressing cycle used was: pressure of 0.32 MPa, temperature of 160°C and time of 8 minutes. Apparent density (AD), water absorption (WA), thickness swelling (TS) after 2 and 24 hours immersion and thickness non-return rate (TNRR) were the physical properties obtained. Mechanical properties evaluated were parallel compression (CP), static bending (MOE and MOR) and internal bonding (IB). The average basic density, total extractive, lignin, mineral components and holocelluloses contents obtained were 0.581gcm-3, 11%, 28%, 2% and 59%, respectively. The average values of the physical and mechanical properties of the boards, followed by their standard deviation were: AD= 0.577 gcm-3 (0.018); CR = 1.03 (0.12); WA_2h = 55% (2.3); WA_24r = 76% (2.5); TS_2h = 32% (4.4); TS_24h = 59% (7.8); TNRR = 62 % (2.0); IB = 0.43 MPa (0.03); CP = 4.9 MPa (0.23); MOE = 1324.4 MPa (1.02); and MOR = 13.4 MPa (1.02). Coffee stem conventional particleboards presented poor physical resistance. On the other hand, they may be commercialized for general uses in dry-conditions.
Idioma: en
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