A kind of preparation method of wood adhesive with hydrolyzed collagen as raw material

A technology for hydrolyzing collagen and wood adhesives, which is applied in the preparation of animal glue or gelatin, protein adhesives, adhesives, etc., and can solve the problem of low molecular weight of hydrolyzed collagen, reducing the effectiveness of collagen, and environmental pollution, etc. problems, to achieve the effect of simple preparation process, alleviating the shortage of petrochemical raw materials, and avoiding environmental hazards

Active Publication Date: 2018-01-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, it is necessary to prepare a prepolymer or emulsify the hydrolyzed collagen solution, then graft and modify the hydrolyzed collagen, and the obtained grafted modified hydrolyzed collagen is cross-linked to obtain the final product, leading to this method Long production cycle and low efficiency
The quality of collagen in tanning solid waste only accounts for less than 70% of the total mass of the adhesive, and the amount of collagen used is obviously low, which reduces the effectiveness of the actual utilization of collagen in tanning solid waste, and the raw materials are added with Synthetic resin, there is a risk of causing environmental pollution
[0004] Hydrolyzed collagen has a low molecular weight and contains a large number of hydrophilic groups. At present, the water resistance of protein adhesives synthesized from this raw material is generally weak.

Method used

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  • A kind of preparation method of wood adhesive with hydrolyzed collagen as raw material
  • A kind of preparation method of wood adhesive with hydrolyzed collagen as raw material
  • A kind of preparation method of wood adhesive with hydrolyzed collagen as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0051] (1) Weigh 10 parts of hydrolyzed collagen (abbreviated as CH, the same below) and add 50 parts of deionized water into the reaction kettle, stir at room temperature for 10 minutes to dissolve, and obtain a uniformly mixed solution. Adjust the pH to 9.0 and the temperature to 60 ℃;

[0052] (2) Add 2 parts of γ-glycidyl etheroxypropyl trimethoxysilane (GPTMS) to the hydrolyzed collagen solution in step (1), maintain the pH of the system at 9.0 and the temperature at 60 °C, and stir for 10 h , the hydrolyzed collagen-based adhesive can be obtained.

[0053] The prepared GPTMS cross-linked hydrolyzed collagen adhesive (GPTMS-CH) was used for birch bonding, and the dry strength and wet strength were tested. The characterization of the product and the test results of the bonding strength are as follows: Figure 1-3 shown. Depend on Figure 1-3 It can be seen that GPTMS has successfully cross-linked hydrolyzed collagen, and the product structure formed by silanol condensa...

Embodiment 2

[0055] (1) Weigh 10 parts of hydrolyzed collagen and 100 parts of deionized water into the reaction kettle, stir at room temperature for 10 minutes to dissolve, and obtain a uniformly mixed solution. Adjust the pH to 10.0 and the temperature to 50 °C;

[0056] (2) Add 2 parts of γ-glycidyl etheroxypropyltriethoxysilane (GPTES) to the hydrolyzed collagen solution in step (1), maintain the pH of the system at 10.0 and the temperature at 50 °C, and stir for 11 h, the hydrolyzed collagen-based adhesive can be obtained.

[0057] The prepared GPTES cross-linked hydrolyzed collagen adhesive (GPTES-CH) was used for birch bonding, and the dry strength and wet strength were tested. The characterization of the product and the test results of the bonding strength are as follows: Figure 4-6 shown. Depend on Figure 4-6 It can be seen that GPTES has successfully cross-linked hydrolyzed collagen, and the product structure formed by silanol polycondensation reaction is mainly a three-dime...

Embodiment 3

[0059] (1) Weigh 10 parts of hydrolyzed collagen and 80 parts of deionized water into the reaction kettle, stir at room temperature for 10 minutes to dissolve, and obtain a uniformly mixed solution, adjust the pH to 7.0, and the temperature to 40 °C;

[0060] (2) Add 2.5 parts of 3-aminopropyltrimethoxysilane (APTMS) and 1 part of glutaraldehyde to the hydrolyzed collagen solution in step (1), adjust the system temperature to 50 °C and pH after stirring for 2 h 8.0, stirring and reacting for 8 h, the hydrolyzed collagen-based adhesive can be obtained.

[0061] The prepared APTMS cross-linked hydrolyzed collagen adhesive (APTMS-CH) was used for birch bonding, and the dry strength and wet strength were tested. The characterization of the product and the test data of the bonding strength are as follows: Figure 7 , 8 shown. Depend on Figure 7 , 8 It can be seen that APTMS has successfully cross-linked hydrolyzed collagen, and when the mass ratio of APTMS to hydrolyzed colla...

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Abstract

The invention discloses a method for preparing wood adhesives by crosslinking hydrolyzed collagen with a silane coupling agent. The method is to first add 10 parts of hydrolyzed collagen (molecular weight 1000-3000 Da) and 50-100 parts of deionized water into a reaction kettle , stirred at room temperature for 10 minutes to dissolve, and a uniformly mixed solution was obtained, and the pH was adjusted to 7.0-10.0, and the temperature was 30-60°C. Add 1.5-3 parts of silane coupling agent and 0-2 parts of bifunctional aldehyde to the above-mentioned hydrolyzed collagen solution for reaction, and continue to stir and react for 8-12 hours to obtain a hydrolyzed collagen-based adhesive. The hydrolyzed collagen cross-linked by silane coupling agent is used as wood adhesive, which improves its water resistance and bonding strength. The invention has few steps, simple operation and easy industrial production.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of leather solid waste, and specifically relates to a wood adhesive produced by using hydrolyzed collagen extracted from solid waste produced by shaving, peeling and trimming in the process of tanning as the main raw material Methods. Background technique [0002] Adhesives used in my country's wood processing industry account for about 60% of the total amount of adhesives each year, while wood adhesives on the market are mainly synthetic organic polymers, such as urea-formaldehyde resins, phenolic resins, and melamine resin adhesives, etc. . The environmental and resource problems caused by such adhesives are becoming more and more serious, and the preparation of biomass-based adhesives from non-toxic and renewable animal and plant proteins has gradually become an important development direction in the field of wood adhesives. Currently reported protein adhesives include soybean pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C09J11/06C08J3/24
Inventor 廖学品徐腾石碧周建飞王亚楠
Owner SICHUAN UNIV
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