Nano composite soy protein plastic and preparation method thereof

A soybean protein and nano-composite technology, applied in the field of plastics, can solve the problems of poor reusability of synthetic plastics, environmental pollution, and slow environmental degradation rate, and achieve the effect of realizing resource utilization, wide application prospects, and avoiding toxicity problems.

Inactive Publication Date: 2015-08-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Synthetic plastics prepared from fossil fuels will cause serious environmental pollution problems due to their poor reusability and slow environmental degradation rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Mix 1 part by weight of montmorillonite and 30 parts by weight of absolute ethanol, stir at room temperature for 12 hours and then ultrasonically for 10 minutes, then add 2 parts by weight of γ-aminopropyl-3-ethoxysilane dropwise, and then at 70 o React for 10 h under the condition of C, filter and wash after the reaction, dry naturally at room temperature, grind and sieve to prepare amino montmorillonite. Mix 1 part by weight of soybean protein isolate, 0.02 part by weight of aminomontmorillonite and 0.1 part by weight of dialdehyde starch with an aldehyde group content of about 10%, stir at room temperature for 1 hour, add 0.2 part by weight of glycerin, and add 0.1 part by weight to remove Ionized water, stirred at room temperature for 0.5h. Use a heat press at 80 o C. Under the condition of 5MPa, the mixture was hot-pressed for 30min to prepare the nanocomposite soybean protein plastic.

Embodiment 2

[0023] Example 2 Mix 1 part by weight of lithium diatomaceous earth and 30 parts by weight of absolute ethanol, stir at room temperature for 12 hours, then sonicate for 10 minutes, then add 3 parts by weight of γ-aminopropyl-3-ethoxysilane dropwise, and then at 80 o The reaction was carried out under the condition of C for 8 hours. After the reaction was completed, it was filtered and washed, dried naturally at room temperature, ground and sieved to prepare lithium amide algae. Mix 1 part by weight of soybean protein isolate, 0.04 part by weight of lithium amide and 0.15 part by weight of dialdehyde xanthan gum with an aldehyde group content of about 30%, stir at room temperature for 1.5 hours, add 0.1 part by weight of propylene glycol, and add 0.2 parts by weight of deionized water, and stirred at room temperature for 0.5 h. Use a heat press at 100 o C. Under the condition of 10MPa, the mixture was hot-pressed for 20min to prepare the nanocomposite soybean protein plasti...

Embodiment 3

[0024] Example 3 Disperse 1 part by weight of attapulgite in 30 parts by weight of absolute ethanol, stir at room temperature for 12 hours and then sonicate for 10 minutes, then add 3 parts by weight of γ-aminopropyl-3-ethoxysilane dropwise, and then at 90 o The mixture was reacted for 8 hours under the condition of C, filtered and washed after the reaction, dried naturally at room temperature, ground and sieved to prepare amino attapulgite. Mix 1 part by weight of soybean protein isolate, 0.06 part by weight of amino-attapulgite and 0.15 part by weight of dialdehyde pullulan with an aldehyde group content of about 70%, stir at room temperature for 2 hours, add 0.25 part by weight of sorbitol, and add 0.5 parts by weight of deionized water, stirred at room temperature for 1 h. Use a heat press at 110 o C. Under the condition of 20MPa, the mixture was hot-pressed for 15min to prepare the nanocomposite soybean protein plastic.

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Abstract

The invention relates to a nano composite soy protein plastic and a preparation method thereof. The nano composite soy protein plastic is prepared by the following steps: with soy isolate protein as a base material, dialdehyde polysaccharide with the aldehyde content of 5%-80% as a cross-linking agent, and amino nano clay as a nano filler, adding a plasticizer which is 10%-30% of dry weight of the soy isolate protein and a certain amount of deionized water; carrying out hot-pressing by using a hot press at 80-140 DEG C and 5-50MPa for 3-30 minutes. The nano composite soy protein plastic prepared by the method has relatively high water resistance, mechanical property and heat stability, is an environment-degradable high-strength protein plastic, and has a wide application prospect in the fields such as biological materials, foods and medicine packaging.

Description

technical field [0001] The invention relates to the technical field of plastics. Specifically, it relates to an environmentally degradable nanocomposite soybean protein plastic with high water resistance, mechanical properties and thermal stability and a preparation method thereof. Background technique [0002] Synthetic plastics prepared from fossil fuels will cause serious environmental pollution problems due to their poor reusability and slow environmental degradation rate. At the same time, the global energy crisis and the depletion of fossil fuel resources have also sounded the alarm for the development of synthetic plastics. Therefore, the research and development of biodegradable plastics using natural biopolymers as raw materials has attracted increasing attention. [0003] Among the biodegradable materials, soybean protein isolate, a by-product of soybean oil production, has the advantages of large output, wide distribution and renewable, and has been used in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08L5/00C08L3/04C08L5/04C08L1/28C08K13/06C08K9/06C08K3/34C08J3/24
Inventor 李德富葛黎明梁伟杰李德荣赵文博
Owner SICHUAN UNIV
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