亚硫酸处理双组分豆粕胶黏剂的应用性能研究

doi:10.3969/j.issn.1673-5854.2019.06.002

Abstract

Abstract:

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

CLC Number:

TQ35

Jiabao CHEN,Guangbin WANG,Jingya NAN,Lijun WANG,Chunpeng WANG,Fuxiang CHU. The Application Performance of Two-component Soybean Based Adhesive Treated by Sulfurous Acid[J]. Biomass Chemical Engineering, 2019, 53(6): 9-14.

Figures/Tables 6

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References 15

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编号 number	亚硫酸添加量/% sulfurous acid addition	pH值 pH value	黏度/(mPa·s) viscosity	固体质量分数/% mass fraction of solid
A-0	0	5.75	2123	33.1
A-3	3	5.30	2450	32.5
A-6	6	4.81	2080	32.8
A-9	9	4.29	1850	32.3
A-12	12	3.87	1730	32.9

编号 No.	胶合强度bonding strength/MPa		合格率qualified rate/%
编号 No.	63 ℃	100 ℃	63 ℃	100 ℃
P-0	0.94	0.79	100	50
P-3	0.86	0.71	92	25
P-6	1.24	1.02	100	100
P-9	0.90	0.85	92	83
P-12	0.89	0.64	100	0

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

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