A kind of formaldehyde-free soybean gum and preparation method thereof
A technology of formaldehyde-free bean gum and aldehyde bean gum, applied in the preparation of animal glue or gelatin, adhesives, non-polymer adhesive additives, etc., can solve the problem of uneven distribution of cross-linked structure of protein adhesives, artificial bonding Formaldehyde release from panels, inability to use wood-based panels for outdoor use, etc., to achieve the effect of increasing types and quantities, decreasing weak interface layer, and improving adhesive performance
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Embodiment 1
[0046] A formaldehyde-free soybean gum, consisting of the following raw materials by weight:
[0047] Demineralized water 70kg;
[0048] Soybean meal protein powder 35kg;
[0049] Trypsin 0.1kg;
[0050] Soybean chitinase 0.1kg;
[0051] Sodium periodate 2kg;
[0052] Triethylenetetramine 0.2kg;
[0053] Ethylene glycol diglycidyl ether 0.3kg;
[0054] Curing agent 0.3kg.
[0055] When using the formaldehyde-free bean gum in this embodiment: Stir the bean gum prepolymer and the curing agent at room temperature for 10 minutes, and stir evenly before use.
Embodiment 2
[0057] A formaldehyde-free soybean gum, consisting of the following raw materials by weight:
[0058] Demineralized water 70kg;
[0059] Soybean meal protein powder 35kg;
[0060] Trypsin 0.3kg;
[0061] Soybean chitinase 0.3kg;
[0062] Sodium periodate 5kg;
[0063] Triethylenetetramine 0.5kg;
[0064] Ethylene glycol diglycidyl ether 0.8kg;
[0065] Curing agent 0.8kg.
Embodiment 3
[0067] A preparation method of formaldehyde-free bean gum, comprising the following steps:
[0068] (1) According to the weight ratio in the above-mentioned formaldehyde-free soybean gum, weigh each component and prepare raw materials;
[0069] (2) Evenly disperse the soybean meal powder, water and trypsin in the dispersion medium water, raise the temperature of the water bath to 40°C, stir for 30 minutes, then raise the temperature to 80°C for 10 minutes to inactivate the enzyme;
[0070] (3) Cool down the mixture obtained in step 2 to 40°C, add chitosinase, keep it warm for 15 minutes, then raise the temperature to 80°C to kill the enzyme;
[0071] (4) Add sodium periodate to the mixture obtained in step 3, raise the temperature to 50°C, adjust the pH value to 4.0, add triethylenetetramine to react at 50°C for 2 hours after reacting for 5 hours, then raise the temperature to 90°C, and react for 6 hours ;
[0072] (5) Heat up the mixture in step 4 to 80°C, adjust the pH val...
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