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A kind of water-resistant starch-based biodegradable plastic masterbatch and preparation method thereof

A biodegradable plastic and starch-based technology, which is applied in the field of water-resistant starch-based biodegradable plastic masterbatch and its preparation, can solve the problems of product performance degradation, poor processing performance, and high viscosity of the system, and achieve low cost, low viscosity, and high viscosity. The effect of mobility

Active Publication Date: 2021-05-04
山西龙骏艾柯环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the defects that the current starch-based plastics absorb water, the product performance declines, the processing performance is poor, and the system viscosity is relatively high, the present invention proposes a method of modifying starch molecules using carbon ion beams to prepare a product with excellent water resistance and mechanical properties. The method of starch-based plastics, so as to realize the continuous and stable preparation of starch-based degradable plastics with high water resistance, further promote the mass production of starch-based plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Starch modification in the starch-based plastic masterbatch prepared by the present invention is as follows:

[0039] a. Select an appropriate amount of amylose with a molecular weight of 5000, and use an electrostatic adsorption belt system to carry and transport the starch for modification, so that the starch is placed on the bombardment platform of the plasma beam bombardment system;

[0040] b. In a vacuum of 10 -5 Under Pa conditions, the plasma carbon ion beam is used, the energy of the carbon ion beam is 120Mev / u, the beam current is 10mA, the anode voltage is 250V, and the cathode current is 10A. , to accelerate and focus the carbon ion beam; the accelerating electrode voltage of the ion accelerator is 250V, and the irradiation field of the carbon ion beam accelerated by the ion accelerator is 5×5cm 2 , the energy is 450Mev / u;

[0041] c. Constantly change the position of the starch, and irradiate the starch for 2 minutes to obtain the modified starch;

[004...

Embodiment 2

[0046] Starch modification in the starch-based plastic masterbatch prepared by the present invention is as follows:

[0047] a. Select an appropriate amount of amylose with a molecular weight of 10,000, and use an electrostatic adsorption belt system to carry and transport the starch for modification, so that the starch is placed on the bombardment platform of the plasma beam bombardment system;

[0048] b. In a vacuum of 10 -5 Under Pa conditions, the plasma carbon ion beam is used, the energy of the carbon ion beam is 150 Mev / u, the beam current is 50mA, the anode voltage is 250V, and the cathode current is 5A. , to accelerate and focus the carbon ion beam; the ion accelerator accelerating electrode voltage is 200V, and the irradiation field of the carbon ion beam after the ion accelerator is accelerated is 2×5cm 2 , the energy is 400Mev / u;

[0049] c. Constantly change the position of the starch, and irradiate the starch for 2 minutes to obtain the modified starch;

[00...

Embodiment 3

[0054] Starch modification in the starch-based plastic masterbatch prepared by the present invention is as follows:

[0055] a. Select an appropriate amount of amylose with a molecular weight of 10,000, and use an electrostatic adsorption belt system to carry and transport the starch for modification, so that the starch is placed on the bombardment platform of the plasma beam bombardment system;

[0056] b. In a vacuum of 10 -6 Under Pa conditions, the plasma carbon ion beam is used, the energy of the carbon ion beam is 130Mev / u, the beam current is 30mA, the anode voltage is 150V, and the cathode current is 5A. , to accelerate and focus the carbon ion beam; the ion accelerator accelerating electrode voltage is 250V, and the irradiation field of the carbon ion beam after the ion accelerator is accelerated is 10×10cm 2 , the energy is 420Mev / u;

[0057] c. Constantly change the position of the starch, and irradiate the starch for 3 minutes to obtain the modified starch;

[0...

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Abstract

The invention belongs to the technical field of preparation of modified starch, and provides a water-resistant starch-based biodegradable plastic masterbatch and a preparation method thereof. The invention discloses a method for preparing a water-resistant starch-based biodegradable plastic masterbatch. The ion beam generated by the ion source collides with starch granules after being accelerated and focused, and the positively charged particles break chains of some starch molecules due to their acidity, thus obtaining Modified starch is reacted with cross-linking agent, starch modifier and auxiliary agent to extrude. The present invention uses carbon ion beams to modify starch molecules, reduces the crystallinity of starch, strengthens the movement of its molecular chains at high temperatures, and thus has thermoplasticity, high fluidity and low viscosity, and then cross-links and modifies the modified starch molecules. Starch-based plastic masterbatch can be prepared through chemical and extrusion processing, the processing technology is simple, the cost is low, the water resistance and mechanical properties are excellent, and it is green and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified starch, and provides a water-resistant starch-based biodegradable plastic masterbatch and a preparation method thereof. Background technique [0002] Plastic products are being widely used in various fields of people's production and life. Plastics are favored by people for their light weight, waterproof, corrosion resistance, and high strength. However, a large number of discarded plastic products have brought about "white pollution" because of their non-degradability. For this reason, since the 1970s, people have started research and development on degradable plastics. [0003] Native starch has a wide range of uses, but there are some defects in its properties, such as no thermal stability of paste viscosity, insufficient shear resistance stability, poor freeze-thaw stability, no cold water solubility, many branched structures, and no plastic characteristics alone. In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/22C08L3/14
CPCC08J3/226C08J2303/14
Inventor 陈庆昝航
Owner 山西龙骏艾柯环保科技有限公司
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