Biosourced Binder for Wood Particleboards Based on Spent Sulfite Liquor and Wheat Flour
| Autor: | Nádia Paiva, Ana Cláudia M. Ferreira, João Pereira, Jorge Martins, Luísa Carvalho, Fernão D. Magalhães, João Ferra, Margarida Almeida |
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| Přispěvatelé: | Faculdade de Engenharia |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Polymers and Plastics
Wheat flour Formaldehyde 02 engineering and technology Internal bond engineering.material 010402 general chemistry 01 natural sciences Article wheat flour lcsh:QD241-441 chemistry.chemical_compound Dry weight Sulfite Economic viability lcsh:Organic chemistry Synthetic resin Chemistry Pulp (paper) spent sulfite liquor General Chemistry bioadhesives 021001 nanoscience & nanotechnology Pulp and paper industry 0104 chemical sciences wood composites engineering 0210 nano-technology |
| Zdroj: | Polymers Volume 10 Issue 10 Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Polymers, Vol 10, Iss 10, p 1070 (2018) |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym10101070 |
| Popis: | Currently, 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&minus 2, which is above the standard requirements for PB type P2 (0.35 N mm&minus 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. |
| Databáze: | OpenAIRE |
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