Radiation modified soybean isolated protein/starch plastic and preparation method thereof

A soybean protein isolate and starch technology, which is applied in the field of environmental science and natural polymer materials, can solve the problems of difficult market operation, difficult filling materials and soybean protein, and difficult to meet the needs of industrial production and processing, so as to improve the surface compactness and tensile strength. Tensile strength, beneficial to the protection of the ecological environment, the effect of improving the tensile strength and light transmittance

Active Publication Date: 2012-05-09
HENAN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while plastics bring convenience and improve the quality of life to people, they also bring two difficult problems to humans: one is serious environmental pollution; the other is the shortage of oil resources.
[0006] (1) Soy protein isolate biodegradable materials have strong rigidity, poor flexibility, and poor water resistance, which are difficult to meet the needs of industrial production and processing
[0007] (2) The cost of biodegradable materials of soybean protein isolate is relatively high, and in view of the current form, it is difficult to operate in the market
[0008] (3) Soy protein isolate biodegradable materials use some filling materials to improve product performance, but it is difficult to perfectly combine the filling materials with soybean protein, resulting in rough surface and unattractive color of the material

Method used

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  • Radiation modified soybean isolated protein/starch plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Disperse 100kg of soybean protein isolate and starch (88:12, W / W) mixture in 300kg of methanol or ethanol, mechanically stir the SPI to disperse evenly, and divide into three times (interval 10 minutes) Add 1L of hydrochloric acid (0.1mol / L), and stir for 30 minutes in total. After the reaction is completed, filter with suction and dry naturally to obtain the capped modified raw material for later use;

[0026] (2) Add 1 kg of caprolactam to 15 kg of water, add 15 kg of water to 100 kg of raw materials, mechanically stir until fluffy and free of lumps, vacuum seal, and use a dose of 10 kGy for irradiation cross-linking treatment;

[0027] (3) Weigh 100kg of irradiated soy protein isolate and starch mixture, add 20kg of glycerin, mix these raw materials well, pour them into the flat mold of the flat vulcanizer, and mold them at a molding temperature of 120°C and 15Mpa Under pressure, hot press for 15 minutes, and the hot product is cooled and formed at room temperatu...

Embodiment 2

[0029] (1) Disperse 100kg of soybean protein isolate and starch (88:12, W / W) mixture in 300kg of methanol or ethanol, mechanically stir the SPI to disperse evenly, and divide into three times (interval 10 minutes) Add 1L of hydrochloric acid (0.1mol / L), and stir for 30 minutes in total. After the reaction is completed, filter with suction and dry naturally to obtain the capped modified raw material for later use;

[0030] (2) Add 1 kg of caprolactam to 15 kg of water, add 15 kg of water to 100 kg of raw materials, mechanically stir until fluffy and free of lumps, vacuum seal, and use a dose of 30 kGy for irradiation cross-linking treatment;

[0031] (3) Weigh 100kg of irradiated soy protein isolate and starch mixture, add 20kg of glycerin, mix these raw materials well, pour them into the flat mold of the flat vulcanizer, and mold them at a molding temperature of 120°C and 15Mpa Under pressure, hot press for 15 minutes, and the hot product is cooled and formed at room temperatu...

Embodiment 3

[0045] (1) 100kg of soybean protein isolate and starch (85:15, W / W) mixture is dispersed in 300kg of methanol or ethanol, mechanically stirred to make the SPI evenly dispersed, after stirring, divide into three times (interval 10 minutes) Add 1L of hydrochloric acid (0.1mol / L), and stir for 30 minutes in total. After the reaction is completed, filter with suction and dry naturally to obtain the capped modified raw material for later use;

[0046] (2) Add 1 kg of caprolactam to 15 kg of water, add 15 kg of water to 100 kg of raw materials, mechanically stir until fluffy and free of lumps, vacuum seal, and use a dose of 50 kGy for irradiation cross-linking treatment;

[0047] (3) Weigh 100kg of irradiated soy protein isolate and starch mixture, add 20kg of glycerin, mix these raw materials well, pour them into the flat mold of the flat vulcanizer, and mold them at a molding temperature of 120°C and 15Mpa Under pressure, hot press for 15 minutes, and the hot product is cooled and...

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Abstract

The invention claims a radiation modified soybean isolated protein/starch biodegradable plastic and a preparation method thereof, wherein the radiation modified soybean isolated protein/starch plastic is prepared by taking soybean isolated protein and starch as main materials and modifying the materials by ray radiation; when the biodegradable plastic is prepared, each material is mixed according to the following parts by weight: 85-95 parts of modified soybean isolated protein, 5-15 parts of modified starch, 1-3 parts of caprolactam, 10-20 parts of water and 10-25 parts of glycerol. The invention has the following advantages: the soybean isolated protein is modified by proper methanol or ethanol, so hydrophilic group in the protein is reduced and water resistance of the plastic is improved. Proper starch is taken as the filler, so that flexibility of the plastic is enhanced and cost is reduced to be suitable for industrial production. Meanwhile, by regulating content of the starch and irradiation dose, materials with different mechanical properties can be obtained, thereby obtaining high technology content and innovation. The preparation technology adopts a common plastic device and a method thereof, so the process is simple, and easy to operate. Furthermore, the radiation modified soybean isolated protein/starch plastic is formed by the modified soybean isolated protein and a plasticiser by hot pressing, so that the radiation modified soybean isolated protein/starch plastic, after being discarded, is very easy to decompose into carbon dioxide and water by microbe without environmental pollution. The soybean protein is an inexhaustible renewable resource.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, relates to soybean protein plastics and irradiation processing technology, specifically relates to soybean protein and starch cross-linked biodegradable plastics and a preparation method thereof, and also belongs to the field of environmental science and technology. Background technique [0002] After the 20th century, the research on synthetic polymer materials has advanced by leaps and bounds. As the material basis of social development, materials have promoted the development of human society and the progress of human civilization. Based on the excellent performance of petroleum-based polymer materials, they have been widely used applied to all areas of society. However, while plastics bring convenience to people's lives and improve their quality of life, they also bring about two difficult problems: one is serious environmental pollution; the other is the shortage of oil resources. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08L3/02C08H1/00C08K5/3432C08K5/053C08J3/28C08J3/24B29C43/58
Inventor 陈复生刘伯业徐卫河何乐王红娟王洪杰郭东权姚永志丁长河孙倩刘海远李彦磊陈亚敏李润洁
Owner HENAN UNIVERSITY OF TECHNOLOGY
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