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Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (6): 9-14.doi: 10.3969/j.issn.1673-5854.2019.06.002

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The Application Performance of Two-component Soybean Based Adhesive Treated by Sulfurous Acid

Jiabao CHEN1,2,Guangbin WANG1,2,Jingya NAN1,2,3,Lijun WANG1,2,*(),Chunpeng WANG1,2,3,Fuxiang CHU1,2,3   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
    3. Research Institute of Forestry New Technology, CAF, Beijing 100091, China
  • Received:2018-05-23 Online:2019-11-30 Published:2019-12-10
  • Contact: Lijun WANG E-mail:wanglijun3518@163.com
  • Supported by:


The two-component soybean meal adhesive was prepared by room temperature compounding method using soybean meal as the main raw material. The effects of the addition of sulfurous acid on the physical properties, curing viscoelasticity of the adhesive and the shear strength of the plywood were analyzed. The structures of the two-component soybean based adhesive that was prepared by the sulfurous acid treatment were characterized by FT-IR. The experimental results show that sulphate can reduce the viscosity of the adhesive system, and when the addition amount of sulfurous acid is 6%, the viscosity and the pH value of the two-component soybean meal adhesive are moderate. FT-IR shows that sulfite can promote protein hydrolysis and expose more active groups.The curing crosslinking degree and the curing viscoelasticity were better in the range of 120-150 ℃. The bonding strength of the three-layer plywood prepared by the two-component soybean based adhesive satisfies the requirement of the national standard for type Ⅰ and type Ⅱ plywood and reaches 1.02 MPa(100 ℃) and 1.24 MPa(63 ℃), respectively.

Key words: sulfurous acid, soybean meal adhesives, physical and mechanical properties, curing viscoelastic properties

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