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Soybean meal-based adhesive enhanced by MUF resin

机译：MUF树脂增强的豆粕型胶粘剂

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摘要

Soybean meal flour, polyethylene glycol (PEG), sodium hydroxide (NaOH), and a melamine-urea-formaldehyde (MUF) resin were used to formulate soybean meal/MUF resin adhesive. Effects of the adhesive components on the water resistance and formaldehyde emission were measured on three-ply plywood. The viscosity and solid content of the different adhesive formulations were measured. The functional groups of the cured adhesives were evaluated. The results showed that the wet shear strength of plywood bonded by soybean meal/NaOH adhesive increased by 33% to 0.61 MPa after adding NaOH into the adhesive formulation. Addition of PEG reduced the viscosity of the soybean meal/NaOH/PEG adhesive by 91% to 34,489 cP. By using the MUF resin, the solid content of the soybean meal/MUF resin adhesive was improved to 39.2%, the viscosity of the adhesive was further reduced by 37% to 21,727 cP, and the wet shear strength of plywood bonded by the adhesive was increased to 0.95 MPa, which met the interior plywood requirements (≥0.7 MPa). The formaldehyde emission of plywood bonded by the soybean meal/MUF resin adhesive was obtained at 0.28 mg/L, which met the strictest requirement of the China National Standard (≤0.5 mg/L). FTIR showed using the MUF resin formed more -CH _2i- group in the cured adhesive.
机译：豆粕粉，聚乙二醇（PEG），氢氧化钠（NaOH）和三聚氰胺-脲-甲醛（MUF）树脂用于配制豆粕/ MUF树脂粘合剂。在三层胶合板上测量了粘合剂组分对耐水性和甲醛释放的影响。测量了不同粘合剂制剂的粘度和固体含量。评价固化的粘合剂的官能团。结果表明，在粘合剂配方中加入NaOH后，豆粕/ NaOH粘合剂粘合的胶合板的湿剪切强度提高了33％，达到0.61 MPa。 PEG的添加使豆粕/ NaOH / PEG粘合剂的粘度降低了91％，降至34,489 cP。通过使用MUF树脂，豆粕/ MUF树脂胶粘剂的固含量提高到39.2％，胶粘剂的粘度进一步降低了37％，降至21,727 cP，胶粘剂胶合板的湿剪切强度为增加到0.95 MPa，满足内部胶合板要求（≥0.7 MPa）。豆粕/ MUF树脂胶粘剂胶合板的甲醛释放量为0.28 mg / L，符合中国国家标准的最严格要求（≤0.5mg / L）。 FTIR显示使用MUF树脂在固化的粘合剂中形成更多的-CH _2i-基团。

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