Dual-modified soybean-based wood adhesive and preparation method thereof
A technology of double modification of wood adhesives, applied in the field of wood adhesives, can solve the problems of high hazards of crosslinking agents, large amount of formaldehyde release, and harm to human health, and achieve environmental friendliness, simple preparation process, and high adhesive strength. And the effect of water resistance improvement
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Embodiment 1
[0019] The present invention is a dual-modified soy-based wood adhesive, which contains the following components in mass percentages, each containing: 9% soy protein isolate, 0.3% sodium hydroxide, 0.001% tyrosinase, 3% urea, The balance is water.
[0020] The present invention is a method for preparing dual modified soy-based wood adhesive. Soy protein isolate and water are taken separately, soy protein isolate is dissolved in water, sodium hydroxide is taken to adjust the pH of the solution to 8, and then stirred at 50°C Soy protein solution is formed in 2h, then urea is added to dissolve for 10min, then tyrosinase is added, and stirred at 37℃ for 3h, at a pressure of 25MPa (3626psi), a volume of 100mL, and a temperature of 4℃. Get wood adhesive.
Embodiment 2
[0022] The present invention is a dual-modified soybean-based wood adhesive, which contains the following components by mass percentage, and each 100 grams contains: a mixture of 10% soy protein and whey protein in a mass ratio of 20:1, potassium hydroxide 0.4 %, laccase 0.004%, urea 5%, the balance is water.
[0023] The present invention is a method for preparing a dual-modified soy-based wood adhesive. A mixture of soy protein and whey protein in a mass ratio of 10:1 and water are respectively taken, and the soy protein and whey protein are in a mass ratio of 10:1. The constituted mixture was dissolved in water, and the pH value of the solution was adjusted with 0.4% potassium hydroxide by mass percentage, and then stirred at 50°C for 2h to form a soy protein solution. Then, urea was added to dissolve for 10 minutes, and then laccase was added at 37°C. After stirring for 3h, the pressure is 25MPa (3626psi), the volume is 100mL, and the temperature is 4℃. The wood adhesive is o...
Embodiment 3
[0025] The present invention is a dual-modified soybean-based wood adhesive, which contains the following components by mass percentage, and each 100 grams contains: a mixture of 12% soybean protein and millet gluten protein at a mass ratio of 10:1, calcium hydroxide 0.5%, peroxidase 0.005%, urea 12%, the balance is water.
[0026] The present invention is a method for preparing a dual modified soybean-based wood adhesive. The mixture of soybean protein and millet gluten protein is taken separately and water, the mixed protein is dissolved in water, and calcium hydroxide is taken to adjust the pH of the solution to 9.5. Stir at 50℃ for 2h to form a soy protein solution, then add urea to dissolve for 10min, then add peroxidase, 4℃ overnight, under the pressure of 25MPa (3626psi), volume of 100mL, temperature of 4℃, high pressure uniform After quality, the wood adhesive is obtained.
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