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Preparation method of emulsification and compatibilization of soybean protein adhesive

A soybean protein and adhesive technology, which is applied in the preparation of protein adhesives, animal glue or gelatin, adhesives, etc., can solve the problems of low water-resistant bonding strength and poor water-resistant bonding performance of soybean protein adhesives, and achieve excellent water-resistant bonding strength, Accelerated curing speed and excellent water-resistant adhesive performance

Inactive Publication Date: 2013-04-24
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiency of the low water-resistant bonding strength of the above-mentioned soybean adhesive, solve the problem of poor water-resistant bonding performance of the soybean protein adhesive, and provide a kind of emulsified compatibilized soybean protein adhesive with strong water-resistant bonding strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 100g of soybean powder by weight, add it into a three-necked flask equipped with 1000g of water, and stir for 8min at a speed of 100r / min in a constant temperature water bath at 30°C;

[0022] (2) Add 2 g of urea and 0.5 g of sodium dodecylbenzenesulfonate (SDBS) successively, and react for 1 h;

[0023] (3) Utilize 20% NaOH solution to adjust the pH value of the above system to 9, and then continue to add 1g of 2-mercaptoethanol to react for 2 hours to make modified soybean protein glue;

[0024] (4) Add 0.3 g of decanylphenol polyoxyethylene ether OP-10 to the above container, and stir for 3 minutes;

[0025] (5) Add 10 g of WSR-6101 epoxy resin and 0.3 g of triethylenediamine hexahydrate in sequence, mix well, and react at 40°C for 2 hours to prepare a soybean protein adhesive.

[0026] After testing: the solid content of the adhesive is 28.8%, and the contact angle on the surface of the poplar veneer is: 45°. Using this adhesive to lap the poplar veneer, ...

Embodiment 2

[0028] (1) Take 100g soybean protein isolate by weight, add it into a three-necked flask equipped with 1000g water, and stir for 10min at a speed of 120r / min in a constant temperature water bath at 30°C;

[0029] (2) Add 6g of urea and 4.5g of sodium dodecylbenzenesulfonate (SDBS) successively, and react for 1.5h;

[0030] (3) Utilize 20% NaOH solution to adjust the pH value of the above system to 9, and then continue to add 5g of 2-mercaptoethanol to react for 2.5h to make modified soybean protein glue;

[0031] (4) Add 0.5 g of decanylphenol polyoxyethylene ether OP-10 to the above container, and stir for 5 minutes;

[0032] (5) Add 14g of WSR-618 epoxy resin and 0.5g of triethylenediamine hexahydrate in sequence, mix well, and react at 60° C. for 3 hours to prepare a soybean protein adhesive.

[0033] After testing: the solid content of the adhesive is 31.4%, and the contact angle on the surface of the poplar veneer is: 58°. Using this adhesive to lap the poplar veneer, th...

Embodiment 3

[0035] (1) Weigh 100g of low-temperature soybean meal by weight, add it into a three-necked flask filled with 1000g of water, and stir for 9min at a speed of 110r / min in a constant temperature water bath at 30°C;

[0036] (2) Add 4g of urea and 2.5g of sodium dodecylbenzenesulfonate (SDBS) successively, and react for 1.25h;

[0037] (3) Utilize 20% NaOH solution to adjust the pH value of the above system to 9, and then continue to add 3g of 2-mercaptoethanol to react for 2.25h to make modified soybean protein glue;

[0038] (4) Add 0.4 g of Decylphenol Polyoxyethylene Ether OP-10 to the above container, and stir for 4 minutes;

[0039] (5) Add 12g of WSR-6690 epoxy resin and 0.4g of triethylenediamine hexahydrate in sequence, mix well, and react at 50°C for 2.5h to prepare a soybean protein adhesive.

[0040] After testing: the solid content of the adhesive is 33.3%, and the contact angle on the surface of the poplar veneer is: 51°. Using this adhesive to lap the poplar venee...

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Abstract

The invention relates to a preparation method of an emulsification compatibilization soybean protein adhesive. According to the preparation method, a renewable resource soybean protein is used as a raw material, water is used as a solvent, and carbamide, sodium dodecyl benzene sulfonate and 2-mercaptoethanol are selected to modify the soybean protein to destroy hydrogen bonds and disulfide bonds in the soybean protein, so polypeptide chains are fully stretched, and hydrophobic groups are exposed; the soybean protein is emulsified by OP-10 and is blended with an epoxy resin to improve the water-resistant adhesion strength of the adhesive; and simultaneously triethylenediamine hexahydrate is selected as a curing agent to accelerate the curing speed of the adhesive. The obtained adhesive hasexcellent water-resistant adhesion strength, the cost of the adhesive is low because a large amount of water is used as the solvent, and the deeply processed product of the soybean protein, which hasindustrialization values, is obtained, so the added value of the soybean protein is improved. The adhesive which has the advantages of environmental protection, health and no generation of toxic and harmful substances of formaldehyde, phenol and the like can be applied to fields of wood plywoods, shaving boards, fiberboards and the like.

Description

technical field [0001] The invention relates to a preparation method of a soybean protein adhesive, in particular to a preparation method of an emulsified and compatibilized soybean protein adhesive. The soybean protein adhesive is mainly used in the production of wood plywood and furniture, and belongs to the technical field of wood adhesives. technical background [0002] At present, the plywood industry at home and abroad mostly uses trialdehyde (phenolic, urea-formaldehyde, melamine-formaldehyde) glue prepared from value-added products of the petrochemical industry as adhesives, but the plywood prepared by trialdehyde glue can release harmful substances to human body and body in daily use. The environment is toxic and harmful gas formaldehyde. Therefore, in recent years, the research and invention of new adhesives to replace the application of trialdehyde glue in the wood industry has attracted more and more attention. Polyurethane adhesive is a kind of adhesive that has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C09J163/00C08H1/00
Inventor 雷文王考将景露蒋富云李凡珠
Owner NANJING FORESTRY UNIV
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