Soy protein isolate-based polyamides as wood adhesives
Autor: | Christine Gerardin, Siham Amirou, Xuedong Xi, Xinyi Chen, Antonio Pizzi |
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Přispěvatelé: | Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Université de Lorraine (UL) |
Rok vydání: | 2019 |
Předmět: |
040101 forestry
0106 biological sciences Chemistry Maleic anhydride Forestry 04 agricultural and veterinary sciences Plant Science 01 natural sciences Industrial and Manufacturing Engineering [SPI]Engineering Sciences [physics] chemistry.chemical_compound Chemical engineering 010608 biotechnology Hexamethylenediamine Polyamide 0401 agriculture forestry and fisheries Thermomechanical analysis General Materials Science Adhesive Citric acid Soy protein ComputingMilieux_MISCELLANEOUS Curing (chemistry) |
Zdroj: | Wood Science and Technology Wood Science and Technology, Springer Verlag, 2020, 54 (1), pp.89-102. ⟨10.1007/S00226-019-01141-9⟩ |
ISSN: | 1432-5225 0043-7719 |
Popis: | Soy protein isolate was reacted first with maleic anhydride and then hexamethylenediamine to synthesis soy protein isolate-based polyamides (SPIPA). Its bonding properties were measured by preparing laboratory three-layer plywood. Furthermore, a silane coupling agent (KH560), citric acid and maleic anhydride were added as cross-linkers to the SPIPA glue mix before hot pressing the panels. ATR FT-MIR and MALDI-ToF were used to determine the structures of the SPIPA, and thermomechanical analysis was used to analyze its thermomechanical properties. The results show that maleic anhydride reacts with amino acids in the soy protein molecule and then reacts with hexamethylenediamine to form carbamate-structured polyamides. This is confirmed by the ATR FT-MIR and MALDI-ToF results. Moreover, structural analysis indicates that a large number of branched structures are formed and occur in the SPIPA, rendering possible the formation of a network during curing, ensuring the bonding performance of the adhesive. The SPIPA adhesive presented good bonding strength and water resistance above the standard requirements of China National Standard GB/T 9846-2015. In particular, when maleic anhydride was added as a cross-linking agent, namely the SPIPA-MA adhesive, the panels’ dry and wet shear strengths were improved so that it can be considered as a suitable soy protein-based wood adhesive. |
Databáze: | OpenAIRE |
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