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Water-resisting starch-based biodegradable plastic master batch 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 high system viscosity, poor processing performance, and product performance decline, and achieve reduced crystallinity, low cost, and Excellent water resistance and fluidity

Active Publication Date: 2018-03-20
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] The 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 adsorption belt system to carry and transport the modified starch, so that the starch is placed on the bombardment platform of the plasma beam bombardment system;

[0040] b. In vacuum degree 10 -5 Under the condition of Pa, using plasma carbon ion beam, carbon ion beam energy is 120Mev / u, beam current is 10mA, anode voltage is 250V, cathode current is 10A, the surface of starch is bombarded, and carbon ion beam is passed through ion accelerator before bombardment. , the carbon ion beam is accelerated and focused; the acceleration electrode voltage of the ion accelerator is 250V, and the irradiation field of the carbon ion beam after accelerated by the ion accelerator is 5×5cm 2 , the energy is 450Mev / u;

[0041] c. Constantly changing th...

Embodiment 2

[0046] The 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 adsorption belt system to carry and transport the modified starch, so that the starch is placed on the bombardment platform of the plasma beam bombardment system;

[0048] b. In vacuum degree 10 -5 Under the condition of Pa, a plasma carbon ion beam was used, the carbon ion beam energy was 150 Mev / u, the beam current was 50 mA, the anode voltage was 250 V, and the cathode current was 5 A, to bombard the starch surface. Before the bombardment, the carbon ion beam passed through the ion accelerator. , the carbon ion beam is accelerated and focused; the acceleration electrode voltage of the ion accelerator is 200V, and the irradiation field of the carbon ion beam after accelerated by the ion accelerator is 2×5cm 2 , the energy is 400Mev / u; ...

Embodiment 3

[0054] The 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 adsorption belt system to carry and transport the modified starch, so that the starch is placed on the bombardment platform of the plasma beam bombardment system;

[0056] b. In vacuum degree 10 -6 Under the condition of Pa, a plasma carbon ion beam was used, the carbon ion beam energy was 130 Mev / u, the beam current was 30 mA, the anode voltage was 150 V, and the cathode current was 5 A, to bombard the starch surface. Before the bombardment, the carbon ion beam passed through the ion accelerator. , the carbon ion beam is accelerated and focused; the acceleration electrode voltage of the ion accelerator is 250V, and the irradiation field of the carbon ion beam after accelerated by the ion accelerator is 10×10cm 2 , the energy is 420Mev / u...

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Abstract

The invention belongs to the technical field of preparation of modified starch, and provides water-resisting starch-based biodegradable plastic master batch and a preparation method thereof. The preparation method of the water-resisting starch-based biodegradable plastic master batch comprises the following steps: after carrying out accelerated focusing on an ion beam generated by an ion source, colliding with starch grains; enabling part of starch molecules to be subjected to chain breakage due to the acidity of particles with positive charges, so as to obtain modified starch; then enabling the modified starch, a cross-linking agent, a starch modifier and an auxiliary agent to commonly react; extruding to obtain the water-resisting starch-based biodegradable plastic master batch. According to the water-resisting starch-based biodegradable plastic master batch and the preparation method provided by the invention, starch molecules are modified by utilizing a carbon ion beam, so that thecrystallization degree of the starch is reduced and the movement of a molecule chain at high temperature is reinforced, and furthermore, the starch has thermal plasticity, high flowability and low viscosity; then the modified starch molecules are subjected to cross-linking modification and extruding processing to prepare the starch-based plastic master batch; the water-resisting starch-based biodegradable plastic master batch has the advantages of simple processing technology, low cost, excellent water resistance and mechanical properties, greenness and environment protection.

Description

technical field [0001] The invention belongs to the technical field of modified starch preparation, 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 excellent properties such as light weight, waterproof, corrosion resistance and high strength. However, a large number of discarded plastic products have caused "white pollution" because of their non-degradability. To this end, since the 1970s, people have started the research and development of degradable plastics. [0003] Natural starch has a wide range of uses, but there are some defects in its properties, such as poor thermal stability of paste viscosity, insufficient shear resistance stability, poor freeze-thaw stability, no cold water solubility, many branch structures, and no plastic characteristics ...

Claims

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Application Information

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Patent Type & Authority Applications(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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