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Soy protein / emulsion polymerization high polymer nano composite material, and preparation and use thereof

A nanocomposite material and soybean protein technology, applied in the field of polymers and nanomaterials, can solve the problems of difficult biodegradation, poor biocompatibility, and increased cost, and achieve good mechanical properties, enhanced environmental protection, enhanced water resistance and The effect of bond strength

Inactive Publication Date: 2009-04-15
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When forming a core-shell structure compound with other polymers, the mechanical properties and water resistance of the material can be effectively improved, but because synthetic polymers such as polystyrene are difficult to biodegrade, the biocompatibility is poor, and with the rise of petroleum prices , the cost increases, which greatly limits its application

Method used

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  • Soy protein / emulsion polymerization high polymer nano composite material, and preparation and use thereof
  • Soy protein / emulsion polymerization high polymer nano composite material, and preparation and use thereof
  • Soy protein / emulsion polymerization high polymer nano composite material, and preparation and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042]Soybean protein isolate is pre-dissolved in water to obtain a 35% soybean protein aqueous solution by weight. After stirring for 10 minutes, add styrene and emulsifier sodium lauryl sulfate to control the weight ratio of styrene and sodium lauryl sulfate It is 9:1. After stirring at high speed for 40 minutes, the temperature was raised to 90°C to form a well-dispersed emulsion. Then, add potassium persulfate to the emulsion, the initiator is 8.5‰ of the weight of styrene monomer, react at 90°C for 4 hours, cool the emulsion at room temperature, pour it into a glass container after vacuum defoaming, and dry it in vacuum After casting at 50° C. in the box for 24 hours, a transparent protein and polystyrene composite nanoplastic was obtained.

Embodiment 2

[0044] Soybean protein is pre-dissolved in water to obtain a 50% soybean protein aqueous solution by weight. After stirring for 40 minutes, add styrene and emulsifier sodium dodecylbenzenesulfonate to control the concentration of styrene and dodecylbenzenesulfonate. The sodium weight ratio is 4:1. After stirring at high speed for 50 minutes, the temperature was raised to 50°C to form a well-dispersed emulsion. Then, add sodium persulfate to the emulsion, the initiator is 5.5‰ of the weight of styrene monomer, react at 60°C for 10 hours, cool the emulsion at room temperature, pour it into a glass container after vacuum defoaming, and dry it in vacuum After casting at 80°C in the box for 48 hours, a transparent protein and polystyrene composite nanoplastic was obtained, and its scanning electron microscope photo is as follows: figure 1 As shown, the transmission electron microscope pictures are shown as figure 2 shown. Its formation diagram see image 3 .

Embodiment 3

[0046] Soybean protein is pre-dissolved in water to obtain a 16% by weight soybean protein aqueous solution. After stirring for 30 minutes, styrene and emulsifier sodium laurate are added to control the weight ratio of styrene and sodium laurate to 8:1. After stirring at high speed for 1 hour, the temperature was raised to 70° C., and after stirring was continued for 50 minutes, a well-dispersed emulsion was formed. Then, potassium persulfate was added to the emulsion, the initiator was 6.5‰ of the weight of styrene monomer, and after reacting at 70°C for 10 hours, the emulsion was cooled at room temperature, vacuum defoamed, and the protein / polystyrene mixed emulsion was concentrated to 90% of the solid content is put into a single-screw extruder for extrusion molding, and the temperature of the segments of the screw is adjusted to 80° C., 120° C., and 150° C. to obtain nanocomposite plastics.

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Abstract

The invention discloses a soybean protein / emulsion polymerization macromolecule nanometer complex material, which comprises soybean protein, a polymer monomer and an emulsifier. In addition, the invention also discloses a preparation method of the complex material, which comprises the following steps: a mixing liquid of soybean protein / polymer monomer is prepared; complex emulsion is obtained after polymerization; and after cooling, the soybean protein / emulsion polymerization macromolecule nanometer complex material can be produced. The invention also discloses that the nanometer complex material can be applied to a tackiness agent of wood matrix or to the preparation of nanometer complex plastic. The synthesized macromolecules are distributed in protein matrix uniformly by the form of nanometer microspheres; the protein and the synthesized macromolecules are combined into a core-shell structure through an additional emulsifier; and the invention solves the problem of poor compatibility in mixing synthesized macromolecules and natural polymers. The preparation method has the advantages of application of carrying out all reactions in water system, no organic solvent, being friendly to environment and having low cost and broad application prospect.

Description

technical field [0001] The invention relates to a soybean protein / emulsion polymerized macromolecule nanocomposite material and a preparation method thereof, which belongs to the field of macromolecules and also belongs to the field of nanometer materials. Background technique [0002] With the depletion of non-renewable resources such as petroleum, the energy crisis, the continuous rise of crude oil prices and the environmental pollution of non-degradable plastic products, the research and application of natural polymer materials based on renewable resources have attracted much attention. Soybean protein is a by-product of the soybean oil industry. It has a wide range of sources, abundant output, low price, and good biological activity and biodegradability. It can be used in food packaging materials, degradable plastic products, environmental protection adhesives, and food industry, etc. field. The current preparation method of soybean protein material is mainly by physica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08F120/10C08F118/02C08F2/26C09J125/06C09J133/04C09J131/02C09J189/00C08L25/06C08L33/04C08L31/02C08L89/00
Inventor 刘大刚
Owner SOUTH CHINA AGRI UNIV
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