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Preparation method of modified protein-base adhesive

A protein and adhesive-based technology, which is applied in the field of preparation of modified protein-based adhesives, can solve the problems of toughness, unsatisfactory anti-peeling and anti-cracking performance, and low bonding strength, and achieve the safety and environmental protection of the preparation method and anti-cracking performance Good, high peel strength effect

Inactive Publication Date: 2017-05-10
周益铭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problems that the current biomass adhesives have low bonding strength and unsatisfactory toughness, anti-peeling, and anti-cracking performance after use, the present invention provides a preparation of a modified protein-based adhesive The method, the present invention uses the peanut meal after extracting oil from peanuts as a raw material, prepares peanut protein by separating the protein therein, then mixes it with the soybean protein in the soybean meal powder, and destroys the intermolecular space of the soybean protein by weakly acidic sodium bisulfite. At the same time, the disulfide bonds between protein molecules are destroyed by the action of salt, and the protein space structure is destroyed to expose the active groups of the protein, and then cross-linked with Eucommia gum to improve the water resistance and adhesion of the adhesive. Strength, prepared modified protein-based adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Weigh 200g of peanut meal, put it into a pulverizer and crush it, pass through a 200-mesh sieve, add the sieved peanut meal powder into 1.0L deionized water, stir at 300r / min for 10min to obtain a mixed solution, and then use a mass fraction of 5% hydrogen Sodium oxide solution to adjust the pH of the mixed solution to 8.0, transfer the mixed solution to a centrifuge, centrifuge at 5000r / min for 30min, collect the supernatant to obtain a pretreated peanut protein mixed solution; use 5% hydrochloric acid to adjust the above The pH of the pretreated peanut protein mixture is 4.5, and let it stand for 20 minutes, then transfer it to a centrifuge, centrifuge at 5000r / min for 20 minutes, collect the precipitate, wash the precipitate twice with deionized water, and then place the precipitate in a drying box , dried at 55°C for 7 hours to obtain peanut protein isolate; weigh 3.6g of sodium bisulfite, add 300mL of deionized water and mix evenly, and heat to 30°C, then add 70g of...

example 2

[0020] Weigh 250g of peanut meal, put it into a pulverizer and crush it, pass through a 200-mesh sieve, add the sieved peanut meal powder into 1.1L deionized water, stir at 360r / min for 12min to obtain a mixed solution, and then use a mass fraction of 5% hydrogen Sodium oxide solution adjusted the pH of the mixed solution to 8.5, transferred the mixed solution to a centrifuge, centrifuged at 5500r / min for 36min, collected the supernatant to obtain a pretreated peanut protein mixed solution; adjusted the above-mentioned solution with 5% hydrochloric acid The pH of the pretreated peanut protein mixture is 4.8, and let it stand for 25 minutes, then transfer it to a centrifuge, and centrifuge at 5500r / min for 25 minutes, collect the precipitate, wash the precipitate twice with deionized water, and then place the precipitate in a drying box , dried at 58°C for 7.5 hours to obtain peanut protein isolate; weigh 3.8g of sodium bisulfite, add 360mL of deionized water and mix evenly, and...

example 3

[0023]Weigh 300g of peanut meal, put it into a pulverizer and crush it, pass through a 200-mesh sieve, add the sieved peanut meal powder into 1.2L of deionized water, stir at 400r / min for 15min to obtain a mixed solution, and then use a mass fraction of 5% hydrogen Sodium oxide solution to adjust the pH of the mixed solution to 9.0, transfer the mixed solution to a centrifuge, centrifuge at 6000r / min for 40min, collect the supernatant to obtain a pretreated peanut protein mixed solution; use 5% hydrochloric acid to adjust the above The pH of the pretreated peanut protein mixture is 5.0, and let it stand for 30 minutes, then transfer it to a centrifuge, and centrifuge at 6000r / min for 30 minutes, collect the precipitate, wash the precipitate with deionized water for 3 times, and then place the precipitate in a drying box , dried at 60°C for 8 hours to obtain peanut protein isolate; weigh 4.0g of sodium bisulfite, add 400mL of deionized water and mix evenly, and heat to 32°C, the...

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Abstract

The invention relates to a preparation method of a modified protein-base adhesive, belonging to the technical field of adhesives. In order to solve the problems of low binding strength, and nonideal toughness, peeling resistance and cracking resistance after use in the existing biomass adhesive, the invention provides a preparation method of a modified protein-base adhesive. The preparation method comprises the following steps: a peanut cake obtained by peanut oil extraction is used as the raw material and separated to obtain peanut proteins; the peanut proteins are mixed with soybean proteins in soybean cake powder, and weakly-acidic sodium bisulfite is utilized to destroy intermolecular hydrogen bonds of the soybean proteins; meanwhile, intermolecular sulfide bonds of the proteins are destroyed under the actions of salts so as to destroy the space structure of the proteins, so that the active groups of the proteins are exposed; and the proteins are subjected to crosslinking modification treatment by gutta-percha to enhance the water resistance and binding strength of the adhesive, thereby obtaining the modified protein-base adhesive.

Description

technical field [0001] The invention relates to a preparation method of a modified protein-based adhesive, which belongs to the technical field of adhesives. Background technique [0002] Wood adhesive refers to a substance that can make different forms of wood tightly glued together through surface adhesion under certain conditions and has sufficient strength. The characteristics of wood-based panels that are divided first and then combined determine the decisive role of wood adhesives in the wood industry. Wood adhesives can make full use of small-diameter timber and wood processing residues, and improve the comprehensive utilization of wood. At present, most of the adhesives produced in the world are used in the wood industry, and the amount of wood adhesives has become an important symbol to measure the technological development level of a country or a region's wood industry. [0003] The adhesive used in China's wood and wood-based panel industry is still "Lanol" adhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/08C09J11/06
CPCC09J189/00C09J11/06C09J11/08C08L7/00C08K5/315
Inventor 周益铭张潇
Owner 周益铭
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