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Scientia Silvae Sinicae ›› 2021, Vol. 57 ›› Issue (6): 144-149.doi: 10.11707/j.1001-7488.20210616

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Preparation and Characterization of Hot-Pressed Peanut Meal Based Adhesive

Yang Qu1,2,Qin Guo2,Tian Li2,Ziyun Zhao2,Haitao Yue1,Jie Yang1,*,Qiang Wang2   

  1. 1. College of Life Science and Technology, Xinjiang University Urumqi 830046
    2. Key Laboratory of Agro-Food Processing and Quality Control, Ministry of Agriculture Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences Beijing 100193
  • Received:2019-08-29 Online:2021-06-25 Published:2021-08-06
  • Contact: Jie Yang

Abstract:

Objective: Hot-pressed peanut meal (HPM) was used as the research object to prepare HPM adhesive (HPMA) with high bonding strength and good water resistance by composite modified cross-linking,which would expected to provide technical and theoretical basis for its industrial application in the wood field. Method: HPM was modified and crosslinked by sodium dodecyl sulfate (SDS),nano-SiO2 (nSiO2) and polyamide polyamine epichlorohydrin (PAE) resin to study the bonding strength of poplar plywood prepared by HPMA in modified cross-linking process. The appearance,viscosity,solid content,pH,thermal stability,protein secondary structure and surface structure of HPMA in the modified cross-linking process were evaluated. Result: The results showed that the dry,warm and boiling water wet bonding strengths of poplar plywood prepared by HPMA increased by 113%,114% and 81%,respectively,and reached the national class I poplar plywood standard. The prepared HPMA was brown,and the viscosity,solid content and pH were 6 448 mPa·s,31.33% and 5.83,respectively. The thermal decomposition temperature of HPMA was as high as 317℃. The secondary structure and groups of proteins changed significantly during the preparation of HPMA,and the microscopic surface structure was tight from coarse. Conclusion: The main reason for the improvement of bonding strength and water resistance was that the secondary and tertiary structure of protein were opened by SDS,exposing the hydrophobic groups,and hyperbranching with nSiO2 and PAE to form a three-dimensional network structure of insoluble water. It might provide technical and theoretical bases for the industrial application of HPMA.

Key words: hot-pressed peanut meal, modified, cross-linked, poplar plywood

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