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Modified soyabean protein adhesive and preparation method thereof

A technology of soybean protein glue and soybean protein, which is applied in the preparation of protein adhesives, animal glue or gelatin, adhesives, etc., to achieve the effects of excellent water-resistant bonding performance, high adhesive strength, and reduced usage

Inactive Publication Date: 2013-04-03
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods are just examples of the preparation methods of soybean protein adhesives. There is still room for further improvement in the water resistance and bonding strength of the adhesives.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The pre-prepared modified soybean protein adhesive in this example includes the following components in mass percentage: 5% soybean protein isolate, 5.2% urea, 0.1% plant nanocellulose, and the balance of deionized water.

[0024] (1) Preparation of plant nanocellulose

[0025] Prepare a 5% (mass percentage) microcrystalline cellulose aqueous suspension and place it in a beaker, put it in an ice-water bath, insert a thermometer, and add concentrated sulfuric acid to the suspension while stirring until the concentration of concentrated sulfuric acid in the suspension is 50%, stop the dropwise addition, and then continue to stir and react at 40°C for 1.5h; centrifuge the obtained suspension (12000rpm, 10min), remove the supernatant, add deionized water to the precipitate, stir evenly, centrifuge again, repeat five times (or the supernatant obtained after centrifugation is turbid, and the centrifugation can be stopped); use an ultrasonic oscillator to sonicate the obtained...

Embodiment 2

[0030] The pre-prepared modified soybean protein adhesive in this example includes the following components in mass percentage: 7% soybean protein isolate, 8% sodium hydroxide, 1% plant nanocellulose, and the balance of deionized water.

[0031] (1) Preparation of plant nanocellulose

[0032] Prepare a 10% (mass percentage) microcrystalline cellulose aqueous suspension and place it in a beaker, put it in an ice-water bath, insert a thermometer, and add concentrated sulfuric acid to the suspension while stirring until the concentration of concentrated sulfuric acid in the suspension is 50%, stop the dropwise addition, and then continue to stir and react at 40°C for 1.5h; centrifuge the obtained suspension (12000rpm, 10min), remove the supernatant, add deionized water to the precipitate, stir evenly, centrifuge again, repeat five times (or the supernatant obtained after centrifugation is turbid, and the centrifugation can be stopped); use an ultrasonic oscillator to sonicate the...

Embodiment 3

[0037] The pre-prepared modified soybean protein adhesive in this example includes the following components in mass percentage: 8% soybean protein isolate, 10% borax, 2% plant nanocellulose, and the balance of deionized water.

[0038] (1) Preparation of plant nanocellulose

[0039] Prepare a 20% (mass percentage) microcrystalline cellulose aqueous suspension and place it in a beaker, put it in an ice-water bath, insert a thermometer, and add concentrated sulfuric acid to the suspension while stirring until the concentration of concentrated sulfuric acid in the suspension is 50%, stop the dropwise addition, then continue to stir and react at 40°C for 1.5h; centrifuge the resulting suspension (12000rpm, 10min), remove the supernatant, add deionized water to the precipitate, stir evenly, centrifuge again, repeat five times (or the supernatant obtained after centrifugation is turbid, and the centrifugation can be stopped); use an ultrasonic oscillator to sonicate the obtained sus...

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PUM

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Abstract

The invention provides a modified soyabean protein adhesive and a preparation method thereof. The adhesive comprises the following components in percentage by weight: 5 to 10 percent of soy isolation protein, 5 to 14 percent of soy protein modification agent, 0.1 to 5 percent of plant nano cellulose and the balance of water. The preparation method comprises the steps of preparing 5 to 30 percent of microcrystalline cellulose water suspension; putting the microcrystalline cellulose water suspension into an ice water bath; inserting a thermometer; dropping concentrated sulfuric acid until the sulfuric acid concentration is 50 percent; stirring at the temperature of 40 DEG C for reaction for 1.5 hours; centrifugating at the speed of 12,000 rpm for 10 minutes, repeating for 3 to 5 times, and performing ultrasonic for 0.5 hour to obtain the plant nano cellulose suspension; and adding the soy isolation protein, the soy protein modification agent and the plant nano cellulose into the water according to the weight percentage, stirring at the temperature of 50 DEG C for 1 hour, and performing ultrasonic for 0.5 hour to obtain the modified soyabean protein adhesive. The modified soyabean protein adhesive is high in adhering strength and high in water resistance.

Description

technical field [0001] The invention relates to the technical field of adhesives and preparation thereof, in particular to a modified soybean protein adhesive and a preparation method thereof. Background technique [0002] Over the years, the output of trialdehyde glue accounts for about 40% of the total adhesive output. However, the release of harmful free formaldehyde and phenol during the manufacture, transportation and use of trialdehyde glue will cause environmental pollution problems; and petroleum-based adhesives are non-biodegradable materials, and long-term use in large quantities will cause refractory degradation. The accumulation of waste, which in turn degrades the environment. Therefore, research on biomass adhesives based on renewable resources and environmentally friendly biomaterials has received more and more attention, and the adhesive industry has reconsidered new natural adhesives. [0003] Soybean is rich in resources, high yield, soybean protein is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J101/02C09J11/04C09J11/06
Inventor 张萍高德赵满
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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