Investigation on the formulation optimization and characterization of soy protein isolate-based environment-friendly glue
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摘要: 以大豆分离蛋白为原料,采用响应面实验设计,以粘度为响应值,对大豆分离蛋白热聚合进行工艺条件优化。通过正交实验,以粘合强度为指标,优化大豆分离蛋白基环保型胶水配方。并与市售胶水的粘合强度、固形物含量、粘度、甲醛含量进行比较。结果表明:热聚合大豆分离蛋白浓度为10%、热聚合温度为85℃、热聚合时间为50min时,粘度可达7155mPa·s;大豆分离蛋白基环保型胶水最佳配方为大豆分离蛋白5%,聚乙烯醇溶液3.32%,糖6.64%,甘油4.98%,十二烷基磺酸钠0.67%,消泡剂3.33%,防腐剂0.07%,水75.99%,粘合强度达870kPa,大豆分离蛋白胶水的总固形物含量、粘度均大于市售胶水,而粘合强度略低于市售胶水。大豆分离蛋白胶水和市售胶水甲醛含量分别为0、0.036%。Abstract: Soy protein isolated was used as the raw material, and response surface methodology was used to optimize the thermal polymerization process conditions of soy protein isolated. The viscosity of soybean protein was determined and analyzed in various conditions. And soy protein isolate-based environment-friendly glue formulations were obtained by orthogonal experiment with the bonding strength index and compared with commercial glue in the total solids content, bonding strength, viscosity, formaldehyde content. The results showed that the optimum parameters of soybean viscosity were concentration of soybean protein 10%, at 85℃for 50 min, the viscosity of soy protein was 7155mPa·s. Glue formulation was SPI 5%, PVA3.32%, sucrose6.64%, glycerin 4.98%, sodium dodecyl sulfate 0.67%, defoamer 3.33%, preservative 0.07% and water 75.99%.Under the condition, glue bonding strength was 870 kPa. The total solids content and viscosity of soy protein isolate glue was greater than the commercial glue but the bonding strength was slightly lower than the commercial glue. The formaldehyde content of soy protein isolated glue and commercial glue were 0 and0.036%, respectively.
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Keywords:
- soybean protein isolated /
- glue /
- bonding strength /
- thermal polymerization
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