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Enzyme-modified protein wood adhesive and preparation method thereof

A wood adhesive and protein technology, which is used in the preparation of protein adhesives, animal glue or gelatin, and adhesives, etc. Environmentally friendly, improved adhesive force, good component compatibility

Inactive Publication Date: 2020-11-06
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the current adhesives release large amount of formaldehyde, endanger human health, high production cost, poor process applicability, uncompetitive products, and the harmfulness of the cross-linking agent used, the invention provides an enzyme-modified protein wood adhesive and preparation method

Method used

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Effect test

Embodiment 1

[0019] An enzyme-modified protein wood adhesive of the present invention comprises the following components in mass percentages, wherein every 100 grams contains: 4% soybean protein isolate, 0.1% sodium hydroxide, 0.001% tyrosinase, and the balance is water.

[0020] The preparation method of an enzyme-modified protein wood adhesive of the present invention comprises the steps of taking soybean protein isolate and water respectively, dissolving the soybean protein isolate in water, taking sodium hydroxide to adjust the pH value of the solution to 8, and then stirring at 50°C for 2 hours Form a vegetable protein solution, then add tyrosinase, stir at 37°C for 6 hours, and homogenize under high pressure at a pressure of 35MPa (5000psi), a volume of 100mL, and a temperature of 4°C to obtain a wood adhesive.

Embodiment 2

[0022] An enzyme-modified protein wood adhesive of the present invention comprises the following components in mass percentages, and every 100 grams contains: 8% of whey protein, 0.3% of potassium hydroxide, 0.004% of laccase, and the balance is water.

[0023] The preparation method of an enzyme-modified protein wood adhesive of the present invention comprises taking whey protein and water respectively, dissolving the whey protein in water, taking 3% potassium hydroxide by mass to adjust the pH value of the solution to 9, and then Stir at 50°C for 2 hours to form a vegetable protein solution, then add laccase, stir at 37°C for 5 hours, and then homogenize under high pressure at a pressure of 35MPa (5000psi), a volume of 100mL, and a temperature of 4°C to obtain wood glue adhesive.

Embodiment 3

[0025] An enzyme-modified protein wood adhesive of the present invention comprises the following components in mass percent, per 100 grams: 12% of peanut protein, 0.5% of calcium hydroxide, 0.005% of peroxidase and the balance of water.

[0026] The preparation method of an enzyme-modified protein wood adhesive of the present invention comprises: taking peanut protein and water respectively, dissolving the peanut protein in water, taking calcium hydroxide to adjust the pH value of the solution to 11, and then stirring at 50°C for 2 hours to form a plant Protein solution, then add peroxidase, 37°C overnight, under the conditions of pressure 35MPa (5000psi), volume 100mL, temperature 4°C, after high-pressure homogenization, wood adhesive is obtained.

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Abstract

The invention belongs to the technical field of wood adhesives, and particularly relates to an enzyme modified protein wood adhesive and a preparation method thereof. The preparation method comprisesthe following steps: dissolving vegetable protein in water, adding alkaline hydroxide to adjust the pH value of the solution to 7-11, and stirring at 50 DEG C for 2 hours to prepare a vegetable protein solution; adding protease, and stirring for 3 hours at 37 DEG C or staying overnight at 4 DEG C; and performing high-pressure homogenization to obtain the wood adhesive. According to the invention,the enzyme-modified protein wood adhesive provided by the invention only contains protein and low-concentration weak base, so that the problem of formaldehyde release is solved from the source; and the used enzyme is also protein, is friendly to human body and environment, has the effect of cross-linking soybean protein, greatly improves the adhesive strength and water resistance, and has the advantages of greenness, environmental protection and no pollution.

Description

technical field [0001] The invention belongs to the technical field of wood adhesives, and in particular relates to an enzyme-modified protein wood adhesive and a preparation method. Background technique [0002] Plates are widely used in our lives, and they are all inseparable from adhesives. Adhesives, also known as glue, adhesive, slime, or paste, are applied to one or both surfaces of two separate items to bond them together and impede their separation. The traditional adhesive is trialdehyde glue, 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, easy to mix with water, process The advantages of simplicity, convenient operation and low price lead to the fact that 80% of the adhesives currently on the market are trialdehyde glues. However, the wood products made by using trialdehyde glue will release formal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/04C09J11/08
CPCC08K2003/2206C09J11/04C09J11/08C09J189/00C08L89/00C08K3/22
Inventor 杨秀清赵佳丽
Owner SHANXI UNIV
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