Evaluation of mold growth on sugarcane bagasse particleboards in natural exposure and in accelerated test
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Garzón Barrero, Núbia Mireya | 2016-09-06
The objective of this study was to investigate the performance of alternative sugarcane bagasse particle
board (BCP) using castor oil polyurethane resin in comparison with commercial medium density wood
particle board (MDP) under natural and accelerated test conditions. The particle boards were evaluated
after 12 months of exposure to natural weathering in Pirassununga (21.9965 S, 47.4262 W), Brazil and
by an accelerated mold growth test under laboratory conditions. The mold growth was quantified according
to the Standards ASTM D 3273-12 (2012) and the results were evaluated by statistical analysis
through the Proportional Chances Model (PCM). For both materials, the surface coating with castor oil
based bi-component polyurethane resin was less colonized than the non-coated materials; independent
of the particleboard type. Additionally, the bending test shows that the sugarcane bagasse particle boards
presents better performance of module of elasticity (MOR) (7.7 MPa) in comparison with the commercial
wood particle boards (3.6 MPa) after exposed to accelerated tests for mold colonization. The surface
coating with castor oil based polyurethane resin reduces mold growth, therefore these results support
the potential use of this alternative resin both as a binder and as a surface coating in these particulate
materials. The particle boards fabricated with sugarcane bagasse and castor oil resin presented similar
mold colonization compared to the commercial wood particle boards.
LEER