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Corn flour-mimosa tannin-based adhesives without formaldehyde for interior particleboard production |
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| Authors: | Amine Moubarik Hamid Reza Mansouri Antonio Pizzi Fatima Charrier Ahmed Allal Bertrand Charrier |
| Institution: | 1. NANOTECH-MAScIR (Moroccan Foundation for Advanced Science, Innovation and Research), ENSET, Avenue de l’Armée Royale, Madinat El Irfane, 10100, Rabat, Morocco 3. Department of Wood Science and Technology, University of Zabol, Zabol, Iran 4. ENSTIB, Université de Nancy 1, épinal, France 2. IPREM-EPCP (UMR 5254), Université de Pau et des Pays de l’Adour, 2, avenue Pierre Angot, 64053, Pau Cedex 9, France |
| Abstract: | A formaldehyde-free adhesive consisting of a corn flour/NaOH adhesive mixture and a mimosa tannin/hexamine intermediate component was developed and evaluated for application to wood panels such as particleboards. The main ingredients of this adhesive include corn flour, NaOH, mimosa tannin and hexamine. This study investigated the physical properties (rheological and thermal analysis) of corn flour/NaOH and mimosa tannin/hexamine adhesives as well as mechanical properties of particleboards produced with these adhesives. Thermomechanical (TMA) experiments indicate the best performance of the adhesives to be around the relative mass proportions of 50:50 between corn flour/NaOH and mimosa tannin/hexamine. Former NMR measurements on corn starch and mimosa tannin proved that the two components behave as a polymer blend rather than co-reacting. The laboratory results show that particleboards bonded with the adhesive at this optimal ratio show good mechanical properties. Moreover, the formaldehyde emission levels obtained from boards bonded with the optimal adhesive were considerably lower to those obtained from boards made with control urea formaldehyde. |
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