Bio-enzyme modified plant protein base timber adhesive and preparation method thereof

Abstract

The invention discloses a bio-enzyme modified plant protein base timber adhesive and a preparation method thereof. The preparation method of the plant protein base adhesive is as below: conducting homogenization, pH adjusting, enzymolysis, pH readjusting and anti-corrosion treatment on the components of, by weight, 20-30 parts of biomass containing plant protein, 60-120 parts of water, 0.20-1.50 parts of biological enzyme, 0.3-0.8 part of acid, 0.2-2.0 parts of alkali and 0.24-1.10 parts of a preservative. The adhesive uses renewable material sources, contains no toxic or harmful substance, is green and environment-friendly, has water endurance bonding strength reaching the level of grade II adhesive (indoor), and can be used for manufacturing of various indoor man-made boards. The preparation method of the adhesive reduces the use of chemicals, and has the effects of energy saving and emission reduction; and the adhesive overcomes the problems of harm to the health of producers and users and environment pollution caused by chemicals in ordinary adhesive.

Description

technical field

[0001] The invention belongs to the technical field of wood adhesive preparation, and more specifically relates to a non-toxic and environment-friendly bio-enzyme-modified plant protein-based wood adhesive formula and a preparation method thereof for indoor wood-based panels. Background technique

[0002] Adhesives are widely used in human society, and their raw materials are mainly petrochemical products and natural renewable resources. Among them, environmentally friendly adhesives made of renewable resources meet the requirements of human environmental protection and sustainable development, and are an important direction in adhesive research. Among various renewable resources, plant protein-containing biomass has the characteristics of high activity and easy modification, and is the preferred raw material for the preparation of natural adhesives. In order to improve the water resistance of such adhesives, chemical reagents that can react with proteins ar...

Examples

preparation example Construction

[0026] The preparation of the adhesive is carried out in a reactor, and its specific steps are as follows:

[0027] ① Proportionally mix 20-30 parts of biomass containing vegetable protein and 60-120 parts of water in the container;

[0028] ② Homogenize 2-5 times with a pressure of 5-20MPa through a homogenizer;

[0029] ③ Place the homogenized biomass-water mixture in a reactor, control the temperature at 20-35°C, add 0.3-0.8 parts of acid, and react for 5-15 minutes;

[0030] ④ Heat up to 40-65°C, add 0.20-1.50 parts of biological enzyme, and react for 15-50 minutes;

[0031] ⑤ Cool down to 20-35°C, add 0.2-2.0 parts of alkali, and react for 10-40 minutes;

[0032] ⑥ Add 0.24-1.10 parts of preservative and continue stirring for 20-60 minutes to obtain the adhesive.

[0033] The present invention is further clarified in conjunction with the following specific examples, but the present invention is not limited thereto.

Embodiment 1

[0035] Mix distilled water and defatted soybean powder in an open conventional container at a weight ratio of 60:20; then use a high-pressure homogenizer to homogenize 5 times at a pressure of 5 MPa; The water mixture is placed in a reaction kettle with a temperature of 35°C and a stirrer speed of 90 rpm, adding 0.5 parts of hydrochloric acid with a concentration of 30wt%, and reacting for 5 minutes; raising the temperature to 55°C, adding 0.20 parts of hemicellulase, Continue to react for 20 minutes; cool down to 20°C, add 0.4 parts of potassium hydroxide solution with a concentration of 30wt%, and continue to react for 30 minutes; add 0.24 parts of salicylic acid, and continue to stir for 20 minutes to form a bio-enzyme-modified vegetable protein base Wood adhesive.

Embodiment 2

[0037] Mix boiler condensate water and corn gluten powder evenly in an open conventional container at a weight ratio of 90:30; then use a high-pressure homogenizer to homogenize 3 times at a pressure of 10 MPa; mix the high-pressure homogenized corn gluten Powder-water mixture, placed in a reaction kettle with a temperature of 20°C and a stirrer speed of 120 rpm, adding 0.3 parts of acetic acid with a concentration of 45wt%, and reacting for 10 minutes; heating up to 50°C, adding 0.60 parts of hemicellulose Enzyme, continue to react for 20 minutes; cool down to 30°C, add 0.2 parts of potassium hydroxide solution with a concentration of 30wt%, continue to react for 20 minutes; add 0.34 parts of sodium benzoate, continue to stir for 40 minutes to form a biological enzyme modified vegetable protein Based wood adhesive.

technical field

[0001] The invention belongs to the technical field of wood adhesive preparation, and more specifically relates to a non-toxic and environment-friendly bio-enzyme-modified plant protein-based wood adhesive formula and a preparation method thereof for indoor wood-based panels. Background technique

[0002] Adhesives are widely used in human society, and their raw materials are mainly petrochemical products and natural renewable resources. Among them, environmentally friendly adhesives made of renewable resources meet the requirements of human environmental protection and sustainable development, and are an important direction in adhesive research. Among various renewable resources, plant protein-containing biomass has the characteristics of high activity and easy modification, and is the preferred raw material for the preparation of natural adhesives. In order to improve the water resistance of such adhesives, chemical reagents that can react with proteins ar...

Examples

preparation example Construction

[0026] The preparation of the adhesive is carried out in a reactor, and its specific steps are as follows:

[0027] ① Proportionally mix 20-30 parts of biomass containing vegetable protein and 60-120 parts of water in the container;

[0028] ② Homogenize 2-5 times with a pressure of 5-20MPa through a homogenizer;

[0029] ③ Place the homogenized biomass-water mixture in a reactor, control the temperature at 20-35°C, add 0.3-0.8 parts of acid, and react for 5-15 minutes;

[0030] ④ Heat up to 40-65°C, add 0.20-1.50 parts of biological enzyme, and react for 15-50 minutes;

[0031] ⑤ Cool down to 20-35°C, add 0.2-2.0 parts of alkali, and react for 10-40 minutes;

[0032] ⑥ Add 0.24-1.10 parts of preservative and continue stirring for 20-60 minutes to obtain the adhesive.

[0033] The present invention is further clarified in conjunction with the following specific examples, but the present invention is not limited thereto.

Embodiment 1

[0035] Mix distilled water and defatted soybean powder in an open conventional container at a weight ratio of 60:20; then use a high-pressure homogenizer to homogenize 5 times at a pressure of 5 MPa; The water mixture is placed in a reaction kettle with a temperature of 35°C and a stirrer speed of 90 rpm, adding 0.5 parts of hydrochloric acid with a concentration of 30wt%, and reacting for 5 minutes; raising the temperature to 55°C, adding 0.20 parts of hemicellulase, Continue to react for 20 minutes; cool down to 20°C, add 0.4 parts of potassium hydroxide solution with a concentration of 30wt%, and continue to react for 30 minutes; add 0.24 parts of salicylic acid, and continue to stir for 20 minutes to form a bio-enzyme-modified vegetable protein base Wood adhesive.

Embodiment 2

[0037] Mix boiler condensate water and corn gluten powder evenly in an open conventional container at a weight ratio of 90:30; then use a high-pressure homogenizer to homogenize 3 times at a pressure of 10 MPa; mix the high-pressure homogenized corn gluten Powder-water mixture, placed in a reaction kettle with a temperature of 20°C and a stirrer speed of 120 rpm, adding 0.3 parts of acetic acid with a concentration of 45wt%, and reacting for 10 minutes; heating up to 50°C, adding 0.60 parts of hemicellulose Enzyme, continue to react for 20 minutes; cool down to 30°C, add 0.2 parts of potassium hydroxide solution with a concentration of 30wt%, continue to react for 20 minutes; add 0.34 parts of sodium benzoate, continue to stir for 40 minutes to form a biological enzyme modified vegetable protein Based wood adhesive.