Abstract
ABSTRACT The wood panel industry is constantly growing, being necessary the innovation in technologies and raw materials to improve the quality of the final product. Considering the shortage and pressure to decrease the dependence of wood, there is an interest in other renewable materials such as agricultural wastes. Among these wastes, coffee parchment is one which deserves notoriety. An alternative use for coffee parchment could be for production of particleboard in association with wood particles. This study aimed to evaluate the feasibility of using coffee parchment for production of particleboard. The following percentages of wastes were used: 0, 10, 20, 30, 40 and 50% in association to eucalyptus wood. The panels were produced with 8% of urea formaldehyde (based on dry weight of particles). The pressing cycle consisted by: pre-pressing of 0.5 MPa for 10 minutes followed by pressing of 4.0 MPa, and temperature of 160° C for 15 minutes. The compaction ratio of particleboards produced using higher quantities of parchment improved the physical properties. The properties of Water Absorption (2 and 24 h) and Thickness Swelling (2 h) decreased with increasing percentage of coffee parchment. The Thickness Swelling (24 h) showed not significant effect with an increase of coffee waste. The Modulus of Elasticity for coffee parchment particleboards was in the range 646.49 ± 112.65 to 402.03 ± 66.24 MPa, while the Modulus of Rupture ranged from 8.18 ± 1.39 to 4.45 ± 0.75 MPa. The results showed that 10% of coffee parchment could be added for production of particleboards.
Highlights
The brazilian industry of particleboards consumes a significant volume of wood from planted forests, mainly from Eucalyptus genera
The growth of the sector becomes necessary to search for other lignocellulosic materials sources that may contribute to supply the needs of industries as well as contribute to the development of new products (Belini et al, 2014; Farrapo et al, 2014)
The aim of this study was to evaluate the potential of using coffee parchment as raw material for particleboard production associated with eucalyptus wood considering the physical and mechanical properties
Summary
The brazilian industry of particleboards consumes a significant volume of wood from planted forests, mainly from Eucalyptus genera. Such species get emphasize due to the good adaptation in a large area of Brazilian territory and availability for exploring (Mendes et al, 2014). The parchment, known as “thin rind” for being an anatomical pellicle which covers the grain, is part of the waste generated by the coffee processing obtained when the pulping occurs by wet method (Brum et al, 2008). The main destination given to the coffee parchment is the briquettes and pellets production for burning and energy generation (Paula et al, 2011). An environmentallyfriendly alternative for the coffee parchment destination could be for particleboards production
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