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Preparation method of protein-base adhesive

A technology of adhesive and matrix, which is applied in the field of preparation of protein-based adhesives, can solve the problems of enhancing adhesiveness and storage time, poor water resistance and adhesiveness, and reducing hydrophilicity, etc., to achieve enhanced adhesiveness and storage time, low cost and better effect

Inactive Publication Date: 2016-06-22
CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problems of poor water resistance and adhesiveness of traditional starch adhesives, resulting in poor cohesive force and short storage period in the wood-based panel gluing process, a protein-based adhesive is provided. The preparation method, the present invention uses the high protein in the high-gluten flour to carry out enzymolysis first, after enzymolysis, centrifuges to obtain the precipitate, adds garlic, ginger, chitosan and other fermentations to make it have antiseptic effect, and adjusts the pH value after centrifuging to obtain the supernatant After adding surfactant and vibrating, cross-linking reaction with glutaric acid, adding konjac flour to increase its viscosity, mixing the viscous and fermented product, acylation modification with acetic anhydride, to the adhesive, the present invention Combining biological enzyme modification and chemical modification, learning from each other, the effect is better. The chemical modification not only endows the protein with new functional groups to reduce its hydrophilicity, but also partially degrades the protein through biological enzyme modification, increasing the intermolecular groups , the action conditions are mild, the catalytic efficiency is high, and its adhesiveness and storage time are enhanced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First weigh 300g of high-gluten flour, mix it with distilled water at a solid-to-liquid ratio of 1:8, stir and mix for 10 minutes, adjust the pH of the mixture to 8.0 with a mass fraction of 15% sodium hydroxide solution, and add a total mass of 1.0 %biological enzyme and 3% sucrose in total mass, carry out enzymolysis at 35°C for 1h, cool it down to room temperature after enzymolysis, and centrifuge at 6500r / min for 15min to obtain supernatant and sediment respectively; Take 10g of garlic and 12g of ginger, put the garlic into a mortar for grinding, squeeze the ginger, mix the ginger and garlic dregs after the juice is squeezed, mix the mixture with the above sediment at a mass ratio of 1:20, and stir well Then add 3g of chitosan and 0.5% acetic acid solution in total mass, put the mixture into a fermenter, add 1.2% lactic acid bacteria starter in total mass, and set it at 30°C for 5 hours of fermentation; 20% hydrochloric acid solution to adjust the pH to 4.5, and the...

example 2

[0020]First weigh 400g of high-gluten flour, mix it with distilled water at a solid-to-liquid ratio of 1:8, stir and mix for 13 minutes, adjust the pH value of the mixture to 8.5 with a mass fraction of 15% sodium hydroxide solution, and add a total mass of 1.3 %biological enzyme and 4% sucrose in total mass, carry out enzymolysis at 36°C for 1.5h, after the end of enzymolysis, cool it down to room temperature, and centrifuge at 7000r / min for 25min to obtain supernatant and sediment respectively; Weigh 11g of garlic and 13g of ginger, put the garlic into a mortar for grinding, squeeze the ginger, mix the ginger and garlic dregs after the juice is squeezed, mix the mixture with the above sediment at a mass ratio of 1:20, and stir evenly Then add 4g of chitosan and 0.5% acetic acid solution in total mass, put the mixture into a fermenter, add 1.3% lactic acid bacteria starter in total mass, and set it at 33°C for 5-8 hours of fermentation; the obtained supernatant is first Use a...

example 3

[0023] First weigh 500g of high-gluten flour, mix it with distilled water at a solid-to-liquid ratio of 1:8, stir and mix for 15 minutes, adjust the pH of the mixture to 9.0 with a mass fraction of 15% sodium hydroxide solution, and add a total mass of 1.5 % biological enzyme and 5% sucrose in total mass, carry out enzymolysis at 37°C for 2 hours, after the end of the enzymolysis, cool it down to room temperature, and centrifuge at 7500r / min for 30min to obtain supernatant and sediment respectively; Take 12g of garlic and 15g of ginger, put the garlic into a mortar and grind it, squeeze the ginger, mix the ginger and garlic dregs after the juice is squeezed, mix the mixture with the above sediment at a mass ratio of 1:20, stir well Then add 5g of chitosan and 0.5% acetic acid solution in total mass, put the mixture into a fermenter, add 1.5% lactic acid bacteria starter in total mass, and set it at 35°C for 8 hours of fermentation; 20% hydrochloric acid solution to adjust the ...

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Abstract

The invention discloses a preparation method of a protein-base adhesive, belonging to the field of adhesives. The preparation method comprises the following steps: carrying out enzymolysis on high proteins in high gluten flour, centrifuging to obtain a precipitate, adding garlic, ginger, chitosan and the like into the precipitate, and fermenting so that the mixture has the anticorrosive effect; centrifuging to obtain a supernate, regulating the pH value, adding a surfactant, oscillating, carrying out crosslinking reaction with glutaric acid, adding konjaku flour to increase the viscosity, mixing the viscous substance and fermentation product, and carrying out acylation modification with acetic anhydride, thereby obtaining the adhesive. By combining bioenzyme modification and chemical modification, the method draws on each other's strength, and thus, has better effects. The chemical modification endows the proteins with new functional groups and lowers the hydrophilicity; and the bioenzyme modification is utilized to partially degrade the proteins, thereby increasing the intermolecular groups. The method has the advantages of mild acting conditions and high catalytic efficiency, and enhances the adhesiveness and storage time of the adhesive.

Description

technical field [0001] The invention discloses a preparation method of a protein matrix adhesive, which belongs to the field of adhesives. Background technique [0002] Adhesives for wood-based panels in my country are mainly "trialdehyde glue". The wood-based panels produced by this type of adhesive will continuously release formaldehyde during production, transportation and use. Due to the advantages of wide source of raw materials, non-toxicity and degradability, protein-based adhesives are attracting more and more attention. However, the water resistance of protein-based adhesives is poor, and people often use the method of copolymerization or blending with synthetic resins to improve their water resistance, which will lead to the presence of volatile toxic substances, consume a lot of energy and pollute the environment. [0003] Biomass comes from animals, plants and microorganisms in nature, and is an inexhaustible renewable resource. There are many kinds of renewabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/08C09J11/06C08H1/00C12P21/06
CPCC09J189/00C08H1/00C08L2205/02C08L2205/035C09J11/06C09J11/08C12P21/06
Inventor 孙春辉王统军
Owner CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH