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Enzyme-modified biomass wood adhesive and preparation method thereof

A wood adhesive and biomass technology, applied in the field of wood adhesives, can solve the problems of high production cost, poor process applicability, uncompetitive products, etc., achieve important economic and social benefits, increase bonding strength and water resistance, solve the The effect of resource utilization

Inactive Publication Date: 2020-05-08
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of large amount of formaldehyde released by adhesives, harmful to human health, high production cost, poor process applicability, and uncompetitive products, the present invention provides an enzyme-modified biomass wood adhesive and a preparation method thereof

Method used

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  • Enzyme-modified biomass wood adhesive and preparation method thereof
  • Enzyme-modified biomass wood adhesive and preparation method thereof

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Effect test

Embodiment 1

[0023] An enzyme-modified biomass wood adhesive of the present invention comprises the following components in mass percent, per 100 grams: 4% soybean protein isolate, 0.1% sodium hydroxide, 0.001% tyrosinase, and 0.4% glucosamine sulfate %, hydroxymethyl cellulose 2%, and the balance is water.

[0024] The preparation method of an enzyme-modified biomass wood adhesive of the present invention comprises separately taking soybean protein isolate, glucosamine sulfate, hydroxymethyl cellulose and water, dissolving the soybean protein isolate in water, and taking sodium hydroxide to adjust the pH of the solution The value is 7, then stir at 50°C for 2h to form a vegetable protein solution, then add glucosamine sulfate and tyrosinase, stir overnight at 37°C, and then disperse hydroxymethylcellulose evenly in the solution, ultrasonic working time 5s, intermittent time 5s, total time 200s, power 350W, temperature 4°C, volume 100mL. After the pressure is 35MPa (5000psi), the volume i...

Embodiment 2

[0026] An enzyme-modified biomass wood adhesive of the present invention comprises the following components in mass percent, every 100 grams contains: whey protein 8%, potassium hydroxide 0.3%, laccase 0.004%, glucosamine hydrochloride 1.0%, Hydroxyethyl cellulose 2%, the balance is water.

[0027] The preparation method of an enzyme-modified biomass wood adhesive in the present invention comprises taking whey protein, hydroxyethyl cellulose and water respectively, and uniformly dispersing the whey protein and hydroxyethyl cellulose in water, and the ultrasonic working time is 5s , the intermittent time is 5s, the total time is 200s, the power is 350W, the temperature is 4°C, and the volume is 100mL. Take potassium hydroxide to adjust the pH value of the solution to 9, stir at 50°C for 2 hours to form a mixed solution of vegetable protein and cellulose, then add laccase and glucosamine hydrochloride, stir at 37°C for 3 hours, ), the volume is 100mL, and the wood adhesive is o...

Embodiment 3

[0029] An enzyme-modified biomass wood adhesive of the present invention comprises the following components in mass percentages, and every 100 grams contains: a mixture of 12% soybean protein isolate and millet gluten in a mass ratio of 20:1, hydrogenated Calcium 0.8%, peroxidase 0.005%, glucosamine sulfate 1.5%, dextran 3%, and the balance is water.

[0030] The preparation method of an enzyme-modified biomass wood adhesive of the present invention comprises taking millet gluten protein, glucosamine sulfate, dextran and water respectively, dissolving the mixture of soybean protein and millet gluten protein in water, taking hydrogen oxidation Adjust the pH value of the calcium solution to 11, then stir at 50°C for 2 hours to form a vegetable protein solution, then add peroxidase and glucosamine sulfate, stir overnight at 37°C, then disperse the dextran in the solution evenly, and ultrasonically The working time is 5s, the intermittent time is 5s, the total time is 200s, the po...

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Abstract

The invention belongs to the technical field of wood adhesives, and particularly relates to an enzyme-modified biomass wood adhesive and a preparation method thereof. The preparation method comprisesthe following steps: dissolving vegetable proteins in water, adjusting the pH value of the obtained solution to 7-11 by using alkaline hydroxide, and stirring at 50 DEG C for 2 h to prepare a vegetable protein solution; adding polysaccharides, performing ultrasonic treatment to uniformly disperse the polysaccharides in the vegetable protein solution, adding glucosamine and protease, and stirring overnight at 37 DEG C; and performing high-pressure homogenization to obtain the wood adhesive. The formula of the soybean-based wood adhesive only contains proteins, polysaccharides, low-concentrationweak base and glucosamine, does not contain formaldehyde, and is green and pollution-free; and protease modification and glucosamine modification technologies enable the soybean protein and the polysaccharides to form a uniform, compatible and stable network structure, so that the bonding strength and the water resistance of the adhesive are improved.

Description

technical field [0001] The invention belongs to the technical field of wood adhesives, and in particular relates to an enzyme-modified biomass wood adhesive and a preparation method. Background technique [0002] Panels are widely used in our lives, and wood-based panels are gradually appearing in people's field of vision, and they are inseparable from adhesives. Adhesives are applied to one or both surfaces of two separate items to bond them together and impede their separation. In the early days, most of the adhesives used were traditional trialdehyde glues, namely urea-formaldehyde glue, phenolic glue and melamine-formaldehyde glue, because urea-formaldehyde resin has higher bonding strength than other materials, shorter curing time, high concentration, low viscosity, and easy to mix with water. , simple process, convenient operation and low price, so that 80% of the adhesives currently on the market are trialdehyde glues. Of course, things always have two sides. More a...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J101/28C09J105/02C09J11/04C09J11/06
CPCC08K2003/2206C08L2205/025C08L2205/03C08L2205/035C09J11/04C09J11/06C09J189/00C08L89/00C08L1/284C08K3/22C08K5/1545C08L5/02C08L1/28
Inventor 杨秀清
Owner SHANXI UNIV
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