Biosourced Binder for Wood Particleboards Based on Spent Sulfite Liquor and Wheat Flour
AbstractCurrently, the majority of binders used in wood particleboard (PB) manufacturing are formaldehyde-based synthetic resins. Because of the toxicity of formaldehyde, there is a strong demand for eco-friendly alternatives with similar performances and economic viability. In this work, thick spent sulfite liquor (TSSL), an industrial byproduct from sulfite pulp mills, is proposed as a binder for fully bio-based PBs. The results showed that PBs bound with TSSL present appropriate mechanical performance, which was further improved when TSSL was combined with wheat flour at an 84:16 dry weight ratio and preheated to 94 °C prior to application. For 13.2% binder content per dry wood weight, the PB internal bond strength was 0.46 N mm−2, which is above the standard requirements for PB type P2 (0.35 N mm−2). Optical microscopy showed that TSSL hinders the gelatinization of starch granules during preheating, allowing the binder mixture to maintain a low viscosity suitable for combination with wood particles and PB production. View Full-Text
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Ferreira, A.M.; Pereira, J.; Almeida, M.; Ferra, J.; Paiva, N.; Martins, J.; Magalhães, F.D.; Carvalho, L.H. Biosourced Binder for Wood Particleboards Based on Spent Sulfite Liquor and Wheat Flour. Polymers 2018, 10, 1070.
Ferreira AM, Pereira J, Almeida M, Ferra J, Paiva N, Martins J, Magalhães FD, Carvalho LH. Biosourced Binder for Wood Particleboards Based on Spent Sulfite Liquor and Wheat Flour. Polymers. 2018; 10(10):1070.Chicago/Turabian Style
Ferreira, Ana M.; Pereira, João; Almeida, Margarida; Ferra, João; Paiva, Nádia; Martins, Jorge; Magalhães, Fernão D.; Carvalho, Luísa H. 2018. "Biosourced Binder for Wood Particleboards Based on Spent Sulfite Liquor and Wheat Flour." Polymers 10, no. 10: 1070.
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