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Thermoplastic soybean protein composite material and preparation method thereof

A technology of soybean protein and composite materials, which is applied in the field of environmentally friendly materials, can solve the problems of poor thermoplasticity of pure soybean protein, unsuitable for processing and molding, and difficult degradation of materials, and achieve the effect of excellent degradation performance, green environmental protection source, and not easy to absorb moisture

Active Publication Date: 2018-11-30
河南滨湖印务科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems that polyacrylate resin materials are difficult to degrade, pollute the environment, and pure soybean protein has poor thermoplasticity and is not suitable for processing and molding

Method used

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  • Thermoplastic soybean protein composite material and preparation method thereof
  • Thermoplastic soybean protein composite material and preparation method thereof
  • Thermoplastic soybean protein composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Disperse soybean protein isolate in 2.4mol / L urea solution under nitrogen atmosphere. Stir for 2 hours under the condition of a water bath at 35° C., then raise the temperature to 85° C., react for 1 hour, adjust the pH to 8 with sodium hydroxide solution, and perform the soybean protein isolate activation treatment.

[0038] 2) Adjust the grafting reaction temperature to 70°C. After the temperature stabilizes, add ammonium persulfate and sodium bisulfite, stir for 10 minutes, add methyl acrylate dropwise, and the grafting reaction time is 4 hours. A water-insoluble copolymerized product is generated, the product is removed, washed repeatedly, and vacuum-dried to complete the graft modification of soybean protein isolate.

[0039] 3) each component and mass ratio:

[0040] Modified soybean protein: 90 parts;

[0041] Polymethyl methacrylate: 5 parts;

[0042] Butanediol: 2 parts;

[0043] Propylene glycol: 2 parts;

[0044] Antioxidant 1010: 0.7 parts;

[0045]...

Embodiment 2

[0050] 1) Disperse soybean protein isolate in 3.5mol / L urea solution under nitrogen atmosphere. Stir for 1.5 h under the condition of 35° C. water bath, then raise the temperature to 85° C., react for 1.5 h, adjust the pH to 8 with sodium hydroxide solution, and perform the soybean protein isolate activation treatment.

[0051] 2) Adjust the grafting reaction temperature to 75°C. After the temperature is stable, add potassium persulfate and anhydrous sodium sulfite, stir for 10 minutes, add the grafting monomer methyl methacrylate dropwise, and the grafting reaction time is 5 hours. 2% hydroquinone is added dropwise to terminate the reaction, and a water-insoluble copolymer product is generated. The product is removed, washed repeatedly, and vacuum-dried to complete the graft modification of soybean protein isolate.

[0052] 3) each component and mass ratio:

[0053] Modified soybean protein: 80 parts;

[0054] Methyl methacrylate-methyl acrylate copolymer: 15 parts;

[005...

Embodiment 3

[0062] 1) Disperse soybean protein isolate in 8mol / L urea solution under nitrogen atmosphere. After stirring for 1 hour under the condition of a water bath at 35° C., the temperature was raised to 80° C., reacted for 2 hours, adjusted to pH 8 with sodium hydroxide solution, and activated soy protein isolate.

[0063] 2) Adjust the grafting reaction temperature to 80°C. After the temperature stabilizes, add ammonium cerium sulfate, stir for 10 minutes, and add the grafting monomer ethyl methacrylate dropwise. The grafting reaction time is 3 hours. A water-insoluble copolymerized product is generated, the product is removed, washed repeatedly, and vacuum-dried to complete the graft modification of soybean protein isolate.

[0064] 3) each component and mass ratio:

[0065] Modified soybean protein: 70 parts;

[0066] Methyl methacrylate-styrene-nitrile rubber copolymer: 28 parts

[0067] Glycerin: 0.5 parts;

[0068] Antioxidant 1010: 0.5 parts;

[0069] Antioxidant CA: 1 p...

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Abstract

The invention relates to a thermoplastic soybean protein composite material and a preparation method thereof. The thermoplastic soybean protein composite material is characterized by comprising the following components by mass: 65-90 parts of thermoplastic soybean protein, 5-30 parts of polyacrylate resin, 1-5 parts of a plasticizer and 0.5 to 1 part of an antioxidant. The preparation method comprises the following steps: thoroughly mixing the above components by using a high-speed mixer; performing extrusion granulation on a blend by using a twin-screw extruder, wherein the temperature of each heating stage is set to be 160-200 DEG C in the first stage, 180-220 DEG C in the second stage, 200-240 DEG C in the third stage, 200-240 DEG C in the fourth stage and 180-230 DEG C in the fifth stage; and subjecting the granulated thermoplastic soybean protein composite material to vacuum drying at 50-80 DEG C for 12-24 h to allow water content to be no more than 0.1 wt% so as to obtain the finished thermoplastic soybean protein composite material. The thermoplastic soybean protein composite material prepared by using the method of the invention has good thermoplasticity and processing properties, excellent degradation performance, low cost, environment friendliness and great application potential.

Description

[0001] The invention relates to a degradable composite material, in particular to a thermoplastic soybean protein composite material and a preparation method thereof, belonging to the technical field of environment-friendly materials. Background technique [0002] At present, soybean protein-based biodegradable materials can reduce environmental pollution, alleviate energy crisis, and have great significance for ecological balance and sustainable development of resources. my country's soybean output is huge, and the processed soybean protein isolate has high purity and excellent properties. Soybean protein materials prepared after various modification treatments have been successfully applied to films, various utensils, tableware and daily necessities. However, compared with the traditional polyolefin thermoplastic materials that use petroleum as resources, there are still problems such as high processing and production costs, insufficient performance, and poor product stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08L33/12C08L51/04C08L33/14C08F289/00C08F220/14C08F220/18
CPCC08F289/00C08L51/00C08L2201/06C08L33/12C08L51/04C08L33/14C08F220/1806C08F220/1802C08F220/1804
Inventor 王大威田珮何江吕晓煜徐婷秀陈尚良吴江渝郑华明曾小平张树
Owner 河南滨湖印务科技有限公司
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