Method for producing modified soybean albumen adhesive

A technology for soybean protein and soybean protein isolate, which is used in the production of modified soybean protein adhesives, can solve the problems of poor water resistance and low bonding strength of soybean glue, and achieve the effects of high water resistance, bonding strength and excellent bonding quality.

Inactive Publication Date: 2008-09-03
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Effectively solve the problems of poor water resistance and low bonding strength of bean glue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: add 90ml tap water in the common reactor with mechanical stirring device, and add 15g soybean protein concentrate (dry basis weight) wherein according to the requirement of proportion, start mechanical stirring paddle, after stirring 15min, add 60g95% industrial Alcohol, while raising the temperature of the reaction slurry to 50°C through the water jacket, and maintaining it for 60 minutes for modification. In this example, the mass ratio of soybean protein to the aqueous ethanol solution is 1:10, and the mass concentration of the aqueous ethanol solution is 38%. Apply the prepared glue to the sample to be tested and measure the bonding strength to be 55.78Mpa. The bonding strength after three rounds of immersion is 47.54Mpa.

Embodiment 2

[0017] Example 2: Same as Example 1, but add 30 g of absolute ethanol immediately after adding the protein concentrate without stirring, then start the mechanical stirring blade, and adjust the temperature of the fermenter to 75°C. In this example, the mass ratio of soybean protein to the aqueous ethanol solution is 1:8, and the mass concentration of the aqueous ethanol solution is 25%. Apply the prepared glue to the sample to be tested and measure the bonding strength to be 62.14Mpa. The bonding strength after three rounds of immersion is 53.10Mpa.

Embodiment 3

[0018] Embodiment 3: same as embodiment 1, but the soybean protein raw material is changed into soybean protein isolate. The prepared glue was applied to the sample to be tested and the bonding strength measured was 70.25Mpa. The bonding strength after three rounds of immersion is 64.29Mpa.

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PUM

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Abstract

The invention provides a preparation method of modified soybean protein adhesive. Any one selected from soybean protein concentrate, soybean protein isolate, defatted soybean flour, soybean pulp and soybean cake is used as raw material and then organic solvent alcohol is added. The hydrophobicity group of alcohol immerges into the soybean molecule to break the molecule structure and denature the soybean, the hydrophobicity amino acid residues of protein molecule are bare, therefore the bond strength and water resistance is increased. The object of the invention is to solve the problem that the bond strength of soybean protein adhesive is low and the water resistance is bad. The soybean protein adhesive has good bond strength without pollution and the alcohol has the same function of antifoaming agent, so that the soybean protein adhesive has higher bonding strength and water resistance, compared with the soybean protein adhesive which is not modified.

Description

Technical field: [0001] The invention relates to a technology for modifying soybean protein with an organic solvent, in particular to a method for producing a modified soybean protein adhesive utilizing the characteristics of hydrophilic and hydrophobic amphoteric groups of organic solvent ethanol. Background technique: [0002] Soybean protein adhesive represents the most important vegetable protein adhesive, which is a natural adhesive and one of the earliest adhesives used by humans, with a history of thousands of years. It is characterized by cheap price, rich sources of raw materials, and easy processing, manufacturing and use, but its low bonding strength, poor heat resistance and corrosion resistance, especially poor water resistance limit its application. After the Second World War, due to the development of the petroleum industry and the emergence of synthetic adhesives, the quality, performance, and cost of petroleum products were superior to soybean protein produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00
Inventor 班玉凤朱海峰赵文凯杨旭鹏
Owner SHENYANG POLYTECHNIC UNIV
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