Preparation method of composite wood adhesive

A technology for wood adhesives and preparation steps, which is applied in the field of preparation of composite wood adhesives, can solve problems such as poor water resistance and poor fluidity, and achieve the effects of good fluidity, improved durability, and good bonding performance

Inactive Publication Date: 2017-02-22
CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the common problems of soybean-based adhesives such as poor bond strength, poor water resistance and poor fluidity, it provides a method of modifying soybean protein isolate with mussel protein and increasing the viscosity of creeper viscous polysaccharides. In order to improve the strength, the present invention firstly modifies soybean protein isolate with urea and then reacts with mussel mucin under alkaline conditions to obtain modified soybean protein isolate, then enzymolyzes the viscous polysaccharide from creeper suckers, and finally The adhesive can be obtained by mixing. The present invention uses urea to induce soybean protein denaturation under alkaline conditions, and then introduces the dopamine structure of mussel protein and soybean protein molecules to form a stable structure, so that the modified soybean protein has both The advantages make it have high water resistance and fluidity, and the ivy sticky polysaccharide increases the strength of the adhesive. The present invention solves the common problems of soybean-based adhesives in bond strength, poor water resistance and poor fluidity. The prepared The peel strength of the adhesive reaches 1.8-2.0kN / m, and the bonding strength between the plates reaches 85-88MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First weigh 300g of soybean protein isolate and add it to the container, then add 700mL of urea solution with a mass fraction of 5%, stir and mix for 5 minutes, then add a 10% sodium hydroxide solution to adjust the pH to 11.0, and heat the container to 60°C, heat preservation reaction for 2 hours, then add 30g of mussel mucin and coupling agent KH-550, and stir for 40 minutes to obtain a modified soybean protein isolate mixture, which is set aside; collect 500g of creeper suckers and wash them with deionized water for 5 times Finally, put it in a ventilated place to dry for 4 hours, place the ivy sucker after drying in a pulverizer for crushing, and pass through a 100-mesh sieve, collect the sieved material, put it in a beaker, and then add 2L of 95% ethanol solution , and heat the beaker to 70°C, keep stirring for 3 hours to remove fat-soluble substances, then filter to collect the filter residue; put the above filter residue in an enzymolysis tank, add 600mL deionized...

example 2

[0019] First weigh 250g soybean protein isolate and add it to the container, then add 650mL of urea solution with a mass fraction of 5%, stir and mix for 4min, then add a 10% sodium hydroxide solution to adjust the pH to 10.8, and heat the container to 55°C, heat preservation reaction for 1 hour, then add 25g of mussel mucin and coupling agent KH-550, and stir for 35 minutes to obtain a mixture of modified soybean protein isolate, which is set aside; collect 450g of ivy suckers and wash them with deionized water for 4 times Finally, put it in a ventilated place to dry for 3 hours, place the ivy sucker after drying in a pulverizer for crushing, and pass through a 90-mesh sieve, collect the sifted material, put it in a beaker, and then add 1L of 95% ethanol solution , and heated the beaker to 65°C, kept stirring for 2 hours to remove fat-soluble substances, then filtered, and collected the filter residue; put the above filter residue in an enzymatic hydrolysis tank, then added 55...

example 3

[0022] First weigh 300g of soybean protein isolate and add it to the container, then add 700mL of urea solution with a mass fraction of 5%, stir and mix for 5 minutes, then add a 10% sodium hydroxide solution to adjust the pH to 11.0, and heat the container to 60°C, heat preservation reaction for 2 hours, then add 30g of mussel mucin and coupling agent KH-550, and stir for 40 minutes to obtain a modified soybean protein isolate mixture, which is set aside; collect 500g of creeper suckers and wash them with deionized water for 5 times Finally, put it in a ventilated place to dry for 4 hours, place the ivy sucker after drying in a pulverizer for crushing, and pass through a 100-mesh sieve, collect the sieved material, put it in a beaker, and then add 2L of 95% ethanol solution , and heat the beaker to 70°C, keep stirring for 3 hours to remove fat-soluble substances, then filter to collect the filter residue; put the above filter residue in an enzymolysis tank, add 600mL deionized w...

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Abstract

The invention relates to a preparation method of a composite wood adhesive, belonging to the technical field of adhesive preparation. The preparation method comprises the following steps: modifying soybean protein isolate with urea, and reacting with mussel mucoprotein under alkaline conditions to obtain the modified soybean protein isolate; carrying out enzymolysis on Boston ivy suckers to obtain viscous polysaccharases; and finally, mixing to obtain the adhesive. Under alkaline conditions, the urea is utilized to induce the denaturation of the soybean protein, and the dopamine structure of the introduced mussel protein and soybean protein molecule form a stable structure, so that the modified soybean protein has the advantages in both the soybean protein and the mussel protein, and thus, has high water resistance and flowability. The Boston ivy viscous polysaccharases increase the strength of the adhesive. The method solves the common problems of poor binding strength, poor water resistance and poor flowability in the soybean-base adhesive. The peel strength of the prepared adhesive reaches 1.8-2.0 kN / m, and the binding strength between boards reaches 85-88 MPa.

Description

technical field [0001] The invention relates to a preparation method of a composite wood adhesive, which belongs to the technical field of adhesive preparation. Background technique [0002] The production of adhesives for the wood industry accounts for about 75% of the total global production of adhesives, and is the most widely used adhesive product. With the rapid development of the wood industry, the consumption of adhesives used in the wood industry continues to increase, and the level of adhesive manufacturing has become an important indicator to measure the development level of a country or region's wood industry. At present, the adhesives used in my country's wood industry are still dominated by "three-aldehyde" (urea-formaldehyde resin, phenolic resin, melamine-formaldehyde resin) adhesives. "Trialdehyde" adhesives and their products will release harmful gases such as formaldehyde during production and use, causing air pollution in workshops and living rooms, and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J105/00C09J101/28C09J11/06C08H1/00C08B37/00
CPCC09J189/00C08B37/0003C08H1/00C08L2205/025C08L2205/035C09J11/06C08L5/00C08L1/286C08K5/42
Inventor 周丽花孟中立
Owner CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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