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Scientia Silvae Sinicae ›› 2024, Vol. 60 ›› Issue (7): 158-164.doi: 10.11707/j.1001-7488.LYKX20220609

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Preparation and Characterization of Hot-Pressed Peanut Meal and Cold-Pressed Peanut Meal Protein-Based Adhesives for Plywood

Yang Qu,Qin Guo,Xuegang Huang,Tian Li,Manzhu Liang,Jingjing Qin,Qiaozhen Zhang,Hongzhi Liu,Qiang Wang*   

  1. Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences Key Laboratory of Agro-Products Processing,Ministry of Agriculture and Rural Affairs Beijing 100193
  • Received:2022-09-07 Online:2024-07-25 Published:2024-08-19
  • Contact: Qiang Wang

Abstract:

Objective: Hot-pressed peanut meal (HPM) and cold-pressed peanut meal (CPM) were used as raw materials to improve the bonding performance and water resistance through denaturation and crosslinking. Method: HPM and CPM protein-based adhesives were prepared by two-step method of urea (U) denaturation and polyamide polyamine epichlorohydrin (PAE) resin crosslinking, and their differences in bonding strength, viscosity, functional groups, thermal properties and micro morphology were compared. Result: Compared with the pure HPM adhesive and CPM adhesive, the dry shear strength of poplar plywood prepared by the denatured and crosslinked HPM and CPM adhesive was increased by 134.1% and 111.4% respectively. The wet shear strength reached the national class I poplar plywood standard and class II poplar plywood. After denaturation crosslinking, the viscosity was increased by 101.5% and 70.5%, the thermal decomposition temperature was increased to 316.44 ℃ and 307.57 ℃, respectively. And the adhesive prepared by HPM had the most compact surface. Conclusion: The adhesive prepared by HPM has better bonding strength and water resistance than CPM adhesive, and HPM is more suitable as adhesive raw material than CPM.

Key words: plant protein adhesive, hot-pressed peanut meal (HPM), cold-pressed peanut meal (CPM), plywood, bonding strength, water resistance

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