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A tough soybean protein-based adhesive and its preparation method and application

A technology of soybean protein and soybean protein isolate, which is applied in the field of tough soybean protein-based adhesives and its preparation, can solve the problems of high brittleness, low bonding strength, and poor water resistance, and achieve improved toughness, high bonding strength, and water resistance. good sex effect

Active Publication Date: 2022-07-29
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a soybean protein-based adhesive, which can effectively improve the problems of conventional biomass adhesives such as low bonding strength, poor water resistance, and high brittleness; another object of the present invention To provide the preparation method and application of the soybean protein-based adhesive

Method used

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  • A tough soybean protein-based adhesive and its preparation method and application
  • A tough soybean protein-based adhesive and its preparation method and application
  • A tough soybean protein-based adhesive and its preparation method and application

Examples

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preparation example Construction

[0051] The preparation method of involved glycidylamine comprises the steps:

[0052] (1) Put epichlorohydrin, ammonia water, diethylenetriamine and 1,2,4,5-benzenetetraaldehyde in a molar ratio of 5:1:0.2:0.1 in a three-neck equipped with a condenser and a stirrer In the flask, stir evenly at 600 rpm, add ammonium trifluoride, first react at 23 °C for 48 hours, and then react at 35 °C for 3 hours;

[0053] (2) adopt vacuum distillation to remove epichlorohydrin and ammonium hydroxide in the product after reaction, obtain the colorless syrup with branched structure; In the colorless syrup, adding excess concentration is 50% sodium hydroxide The solution was reacted at 20°C for 2 hours. Since the reaction was exothermic, an external ice-water cooling circulator was used to maintain the temperature; after the reaction was completed, the sodium chloride was removed by filtration, and the filtrate was vacuum distilled to obtain glycidylamine.

[0054] The preparation method of th...

Embodiment 1

[0059] The present embodiment provides a soybean protein-based adhesive, comprising the following components by weight:

[0060]

[0061] The present embodiment also provides a method for preparing the above-mentioned soybean protein-based adhesive, which specifically includes the following steps:

[0062] (1) adding soybean protein isolate to tap water, stirring at room temperature and 800rpm for 10min to obtain a homogeneous soybean protein adhesive system;

[0063] (2) adding a cross-linking agent to the soybean protein adhesive system, stirring at room temperature and 600 rpm for 10 min (so that the cross-linking agent is uniformly dispersed in the system), adding an epoxidized natural rubber hybrid material, at room temperature, Stir at 600rpm for 10min (so that the epoxidized natural rubber hybrid material is uniformly dispersed in the system), that is, it is obtained.

Embodiment 2

[0065] The present embodiment provides a soybean protein-based adhesive, comprising the following components by weight:

[0066]

[0067]

[0068] The preparation method of the soybean protein-based adhesive provided in this example is the same as that in Example 1.

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Abstract

The invention relates to the field of plywood preparation, in particular to a tough soybean protein-based adhesive and a preparation method and application thereof. The soybean protein-based adhesive comprises the following components in parts by weight: 10-20 parts of main agent, 2-4 parts of cross-linking agent, and 2-3 parts of epoxidized natural rubber hybrid material; wherein, the main agent is soybean protein isolate; the cross-linking agent is glycidylamine. The soybean protein-based adhesive has high bonding strength, good water resistance, low brittleness, and good toughness, and can meet the water resistance and process requirements of plywood for the adhesive, and the cost of the soybean protein-based adhesive lower, to ensure its practical performance.

Description

technical field [0001] The invention relates to the field of plywood preparation, in particular to a tough soybean protein-based adhesive and a preparation method and application thereof. Background technique [0002] In recent years, precious wood resources are relatively scarce, and plantation forest resources are abundant. The use of plantation fast-growing wood to prepare wood-based panels through adhesives is the main raw material for furniture flooring and interior decoration in the living environment. At present, urea-formaldehyde resins and their modified products are mostly used as adhesives, which are widely used in the wood industry due to their abundant raw materials, low price, and good water solubility. However, urea-formaldehyde resin adhesive products have the problem of formaldehyde release. With the improvement of people's living standards, the pollution of human settlements has attracted attention. In the prior art, biomass adhesives are often used to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C09J11/06C09J11/08B27D1/08C07D303/36C07D301/00C07D301/26
CPCC09J189/00C09J11/06C09J11/08B27D1/08C07D303/36C07D301/00C07D301/26C08L15/00C08K5/29
Inventor 高强李建章徐艳涛韩宇飞李京超龚珊珊
Owner BEIJING FORESTRY UNIVERSITY
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