| Title | New particleboards for food-packaging from poplar peeling by-products using a circular economy approach |
|---|---|
| ID_Doc | 27368 |
| Authors | Santos, J; Fernandes, RA; Ferreira, N; Ferreira, I; Vieira, C; Magalhaes, FD; Martins, JM; de Carvalho, LH |
| Title | New particleboards for food-packaging from poplar peeling by-products using a circular economy approach |
| Year | 2024 |
| Published | |
| Abstract | Poplar (Populus x canadenses Moench.) veneers (PWV) are a sustainable raw material traditionally used for producing food-packaging containers. However, the poplar log peeling process, to obtain veneers with a thick-ness of 0.8-2 mm, generates a large amount of waste, mostly consisting of bark and clippings from veneer sheets. The current work is focused on using these by-products to produce a new material, in the form of thin parti-cleboards, that can be used for package production. The clippings from veneer sheets were dried and milled, and then sieved to obtain different particle size fractions. A bioadhesive, based on poplar bark extract combined with citric acid, was combined with the particles to produce single layer 210 mm x 210 mm x 2 mm particleboards by heat-pressing (press temperature = 160 degrees C, pressing time = 10 min, resin load = 10 wt%). It was possible to produce 100 % biobased particleboards in which the internal bond resistance and the moisture-resistance properties surpass the EN 312 requirements for boards type P3 for non load-bearing boards used in humid conditions, without the addition paraffin or any other additive. This work shows that the valorisation of by-products of poplar wood veneer production allows manufacturing high-performance particleboards, that can be used by the same industry to manufacture food-packaging containers. The viability of recycling used parti-cleboards was demonstrated, yielding products with enough performance to be used in the production of new packaging products, and an alternative to the possible composting of these particleboards. |
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