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Tough soybean protein adhesive as well as preparation method and application thereof

A soybean protein and adhesive technology, used in the preparation of protein adhesives, animal glue or gelatin, and adhesives, etc., can solve the problems of poor bonding ability, poor water resistance, excessive formaldehyde content, etc. The effect of increasing the homogenization time and improving the water absorption rate

Pending Publication Date: 2022-07-12
SCHOLAR HOME SHANGHAI NEW MATERIAL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high formaldehyde content of trialdehyde glue, it is easy to cause the formaldehyde content in indoor air to exceed the standard for a long time, which poses a threat to human health.
[0003] Protein adhesive is a general term for a class of natural adhesives with protein as the main raw material. It can be divided into animal protein adhesives and vegetable protein adhesives. Soybean adhesives belonging to vegetable protein adhesives can replace fossil resources. The source of raw materials is abundant, the price is low, and it is safe and environmentally friendly. The reason shows great potential for development. Although soybean adhesives have defects such as low bond strength and poor water resistance, due to the limited global oil resources and the increasing attention to environmental pollution, environmental friendliness has been reconsidered in industrial applications. Type of natural adhesive, soybean protein adhesive has become a research hotspot again
[0004] Some existing formaldehyde-free soybean protein adhesives have the defects of poor bonding ability and poor water resistance. Therefore, in the process of preparing lightweight boards, large pre-pressing and hot-pressing pressures are required to achieve the required bonding strength and mechanical strength.

Method used

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  • Tough soybean protein adhesive as well as preparation method and application thereof
  • Tough soybean protein adhesive as well as preparation method and application thereof
  • Tough soybean protein adhesive as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of soybean meal dispersion

[0030] The preparation method is as follows:

[0031] (1) pulverizing the soybean meal to pass 200 meshes, then dispersing the soybean meal powder in water to prepare a soybean meal dispersion liquid with a mass concentration of 10%;

[0032] (2) utilize the homogenizer of high pressure shearing to process the soybean meal dispersion, and the homogenization pressure and time are as shown in Table 1;

[0033] (3) Measure the particle size and water absorption of soybean meal in the soybean meal dispersion obtained in each experimental group.

[0034] Table 1

[0035]

[0036]

[0037] Among them, the control group is the soybean meal dispersion without treatment.

[0038] The water absorption test method is as follows:

[0039] Step 1. Dry the samples of each experimental group in Table 1 to obtain the solidified protein samples and weigh them;

[0040] Step 2. Put the cured protein sample in a constant tempe...

Embodiment 2-5

[0049] Embodiments 2-5 relate to a tough soybean protein adhesive and a preparation method.

[0050] 1. Tough soybean protein adhesive formula

[0051] The components and amounts of the tough soybean protein adhesives of Examples 2-6 are shown in Table 1, and "-" in Table 1 indicates that they are not added.

[0052] Table 1 (unit: parts by weight)

[0053]

[0054] Among them, the soybean meal dispersion was prepared by the method provided in Test Group 7 of Example 1.

[0055] The preparation method of the modified PAE resin crosslinking agent comprises the following steps:

[0056] Step 1, preparation of polyamide polyamine intermediate: add adipic acid and diethylene triamine into the reaction kettle, after the raw materials are completely mixed, stir evenly, heat up to 150-180 ° C, and evaporate the water in the solution , after evaporating the water to dryness, immediately stop heating, add a certain proportion of water to adjust the solid content to 20-30wt% when ...

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Abstract

The invention discloses a soybean protein adhesive as well as a preparation method and application thereof, and the soybean protein adhesive comprises soybean meal dispersion liquid, a modified PAE resin cross-linking agent, ethylene glycol diglycidyl ether and castor oil; the soybean meal dispersion liquid is subjected to high-pressure homogenization treatment, soybean meal protein is macromolecules formed after polypeptide is coiled and folded, after high-pressure shearing homogenization treatment, the soybean meal dispersion liquid is subjected to mechanical stress and centrifugal extrusion, and the macromolecules are sheared into micromolecules, so that the protein forms a compact interface layer, the interaction opportunity between protein molecules is increased, and the protein content is increased. Therefore, the particle size is reduced. On the basis of adopting the modified PAE resin cross-linking agent and ethylene glycol diglycidyl ether, the hydrophobic polyether substance castor oil is added, so that a cross-linked network structure is more easily formed, and the bonding strength is further enhanced while the water resistance is improved.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a soybean protein adhesive and a preparation method and application thereof. Background technique [0002] Plywood is widely used, but because it contains formaldehyde, it has become a major problem restricting its application. The formaldehyde contained in plywood is mainly derived from adhesives except for a trace amount of wood itself. Due to the high formaldehyde content of trialdehyde glue, it is easy to cause the formaldehyde content in indoor air to exceed the standard for a long time, posing a threat to human health. Therefore, environmentally friendly adhesives have gradually attracted the attention of industrial circles in various countries. [0003] Protein adhesive is a general term for a class of natural adhesives with protein as the main raw material. It can be divided into animal protein adhesives and vegetable protein adhesives. Soybean adhesives, which are ve...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/08C09J11/06C08G69/48C08G69/50
CPCC09J189/00C09J11/08C09J11/06C08G69/48C08G69/50C08L77/06C08L91/00C08K5/1515Y02P60/87
Inventor 卜立新卜洪伟彭来
Owner SCHOLAR HOME SHANGHAI NEW MATERIAL CO LTD
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