Valorization of wood shavings waste for the production of wood particulate composites

Abstract

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), thickness swelling (TS), both after 2 and 24 hours, apparent density, compression ratio, perpendicular traction, modulus of elasticity (MOE) and modulus of rupture (MOR) in static bending, Janka hardness and screw withdrawal resistance were evaluated. The results of the tests indicated that with the increase of the adhesive content from 6 to 12%, there was no significant statistical difference for the average values of apparent density and compression ratio, being 0.621 g.cm -3 and 1.234, respectively, and the WA and the TS are decreased after 2 and 24 hours. There was a gain of 93% for the MOR property and 64% for the MOE property with the increase of the adhesive content. For perpendicular traction, the highest mean value was 0.67 MPa, referring to the panels with 12% of adhesive. For Janka hardness, the treatments with contents of 9 and 12% of adhesive presented the highest average values being of 21.60 and 25.26 MPa, respectively. In general, the use of wood shavings is feasible for the production of particleboards with a 12% adhesive content.

Chemical, Physical, and Mechanical Properties of Belangke Bamboo (Gigantochloa pruriens) and Its Application as a Reinforcing Material in Particleboard Manufacturing

“…Overall, the use of larger particles, in this case, shavings, showed higher MOE and MOR values when compared to powders [ 76 , 77 , 78 , 79 ]. This condition is in line with the research conducted by Farrokhpayam et al [ 72 ], who reported that fine-sized particles have lower MOE and MOR values than medium- and coarse-sized particles.…”

Oversized Planer Shavings for the Core Layer of Lightweight Particleboard

“…This material is used for a determined period and then subsequently recycled as wood shavings [ 2 ], disposed of as residues from primary wood processing, e.g., sawdust, trimming residues, wood pieces, chips and bark [ 3 , 4 ], or combined with other materials to form composites [ 5 ]. These by-products and leftovers result from the processing of the logs and, added to the branches, trunks, and roots that remain in the forest, represent a significantly higher volume than those of the wood product obtained [ 6 ]. These wood processing residues are generated at industrial facilities and are easily collectible and reusable as potential feedstocks for the wood-based panel, pulp, and pellet industry.…”

“…The production of particleboard comprising residues and by-products such as sawdust, planer shavings, and other residues, started about 80 years ago in the USA and Germany [ 1 , 23 ]. These residues were included mostly in the core layer of these boards [ 6 , 24 ].…”

“…Researchers investigated the properties of particleboards made from decayed wood and bark [26], pine needle litter [27], sunflower stalks [28], sunflower seed husks [29], almond shells [30], walnut and hazelnut shells [31], brewer's spent grain [32], pruned branches [33] and wood chip wastes [34,35]. Rowell (2014) [6,24] analyzed the utilization of wood shavings waste (Populus euroamericana and Eucalyptus grandis) for the production of particleboards [1]. Another way to lower negative environmental impacts is the use of wood waste-based adhesives as particleboard panel binders [36][37][38][39][40].…”