Soy bean protein/aluminium hydrate nano composite material, its prepn. and uses

A nano-composite material and soybean protein technology, applied in the fields of polymer materials and environmental science, can solve the problems of difficulty in processing soybean protein, reduce the tensile strength of materials, etc., and achieve superior product performance, low production cost, and high water resistance. Effect

Inactive Publication Date: 2006-09-20
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of plasticizers solves the shortcomings of soybean protein processing and molding difficulties, but also greatly reduces the tensile strength of the material

Method used

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  • Soy bean protein/aluminium hydrate nano composite material, its prepn. and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: Disperse 10 g of soy protein (SPI) in an aluminum chloride aqueous solution with a concentration of 0.1 wt% and stir vigorously, and then slowly add ammonia water dropwise. The rate of the dropwise addition of ammonia water is 5 g / min, and the reaction time is 0.5 h. The molar ratio of ammonia to aluminum chloride is 4:1. The obtained gel-like composite was centrifuged at 7000 rpm and dried at 70° C. to prepare the SPI / aluminum hydroxide nanocomposite. According to the ratio of glycerin to soybean protein mass ratio of 3:7, glycerin and soybean protein / aluminum hydroxide nanocomposite were mixed. The extruder screw speed: 100rpm, the single screw extruder has three temperature settings from the feed port to the extrusion die: 80, 100 and 120°C. Finally, the soy protein plastic sheet modified and modified by nano aluminum hydroxide was obtained by hot pressing at 140° C. and 20 MPa for 10 minutes, which was numbered AS-1.

Embodiment 2

[0010] Example 2: Disperse 10g of soy protein (SPI) in an aqueous aluminum chloride solution with a concentration of 1wt% and stir vigorously, and then slowly add ammonia water dropwise. The rate of the dropwise addition of ammonia water is 5g / min, the reaction time is 1h, and the ammonia water and The molar ratio of aluminum chloride is 4:1. The obtained gel-like composite was centrifuged at 8000 rpm and dried at 70° C. to prepare the SPI / aluminum hydroxide nanocomposite. According to the ratio of glycerin to soybean protein mass ratio of 3:7, glycerin and soybean protein / aluminum hydroxide nanocomposite were mixed. The extruder screw speed: 60rpm, the single-screw extruder has three temperature settings from the feed port to the extrusion die: 100, 120 and 140°C. Finally, it was hot-pressed at 140° C. and 20 MPa for 10 minutes to obtain a nano-aluminum hydroxide modified soybean protein plastic sheet, numbered AS-2.

Embodiment 3

[0011] Example 3: Disperse 10g of soy protein (SPI) in a 3wt% aluminum chloride aqueous solution with strong stirring, then slowly add ammonia water dropwise, the rate of the dropwise addition of ammonia water is 5g / min, the reaction time is 3h, the ammonia water and The molar ratio of aluminum chloride is 4:1. The obtained gel-like composite was centrifuged at 7500 rpm and dried at 70° C. to prepare the SPI / aluminum hydroxide nanocomposite. According to the ratio of glycerin to soybean protein mass ratio of 3:7, glycerin and soybean protein / aluminum hydroxide nanocomposite were mixed. Extruder screw speed: 30rpm, single-screw extruder has three temperature settings from the feed port to the extrusion die: 100, 120 and 140°C. Finally, the soy protein plastic sheet modified and modified by nano aluminum hydroxide was obtained by hot pressing at 140° C. and 20 MPa for 10 minutes, which was numbered AS-3.

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Abstract

This invention relates to a kind of soybean protein/aluminium hydroxide nano-composites, its preparation method and application. This kind of materials basically comprises 1~30wt% aluminium hydroxide and 70~99wt% soybean protein and a certain amount of glycerol is also permitted. The preparation method is that, soybean protein (SPI) is dispersed in aqueous aluminium chloride solution by fierce stirring and ammonia is slowly dropped in. the gel-like complex is centrifugated and dried so as to obtain SPI/aluminium hydroxide nano-composites. This kind of materials is mixed with glycerol and thermo compressed to obtain SPI/aluminium hydroxide plastic plates. It has the advantages of simple production, environmental friendliness and good mechanical properties. Therefore, it can be potentially used as a kind of biodegradable green materials.

Description

Technical field [0001] The invention relates to a biodegradable aluminum hydroxide modified soybean protein material and a preparation method and application thereof, belonging to the field of polymer materials and also to the field of environmental science. Background technique [0002] Due to the increasing shortage of petroleum resources and the increasing environmental pollution caused by the widespread use of synthetic polymer materials of petroleum resources, the research, development and application of natural polymer materials based on renewable resources have received increasing attention. In recent years, the emerging "industrial protein plastic industry" that uses soybean protein isolate as raw material is in the ascendant. The focus of its research is mainly on the preparation of practical soybean protein materials through physical and chemical modification (Kumar, R.; Choudhary, V.; Varma, IK; Mattiason, B., Ind. Crops Prod., 2002, 16, 155-172.). Soy protein is a by-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08K3/22
Inventor 张俐娜陈谱
Owner WUHAN UNIV
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