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Starch base degradable plastic

A technology for degrading plastics and starch-based plastics, applied in the field of starch-based degradable plastics, can solve problems such as poor solubility, and achieve the effects of low cost, wide sources and environmental protection

Inactive Publication Date: 2011-07-27
杨凌瑞丰环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are hydrogen bonds between the natural starch molecules, the solubility is very poor, and there are a large number of hydroxyl groups, which make it hydrophilic but insoluble in cold water. It is gelatinized when heated to a certain temperature in an aqueous solution, and coagulates in the slow cooling process. Gelling, there is no melting process when heated, and it decomposes at a temperature above 300°C

Method used

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  • Starch base degradable plastic

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 10 grams of cornstarch into a two-necked flask equipped with a thermometer, add 100mL of distilled water, heat up to 85°C, gelatinize the cornstarch for 30 minutes, then lower the temperature to 45°C, add 2g of butyl acrylate, 5% Potassium permanganate solution and 10ml of absolute ethanol, and finally 10% oxalic acid was added dropwise until colorless, the reaction was complete, vacuum filtration under reduced pressure, and the grafted crude product was obtained. In a high-speed mixer, mix and stir 2 grams of polyvinyl alcohol, 1.5 grams of glycerin and 1 gram of glyoxal, heat it up to 110-140 ° C, keep it for 5-20 minutes, add starch grafted crude product and initiator peroxidation After 0.03 g of dibenzoyl, heat up to 160-200° C. and keep for 20-40 minutes to obtain a starch-based degradable plastic.

[0025] Product performance index

[0026] The product formula of Example 1 was used to obtain the prototype product of agricultural degradable starch film, and ...

Embodiment 2

[0030] Starch 80

[0031] Polyvinyl alcohol 12

[0032] Butyl acrylate 10

[0033] Pentylene glycol 10

[0034] Butyraldehyde 8

[0035] Cumyl peroxide 0.4

[0036] According to the above formula, the starch-based degradable plastic was prepared with reference to the preparation method of Example 1.

Embodiment 3

[0038] Starch 60

[0039] Polyvinyl alcohol 6

[0040] Butyl acrylate 10

[0041] Diethylene glycol 8

[0042] Propionaldehyde 5

[0043] Azobisisobutyronitrile 0.2

[0044] According to the above formula, the starch-based degradable plastic was prepared with reference to the preparation method of Example 1.

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Abstract

The invention discloses a starch base degradable plastic prepared by macromolecular composition; wherein the macromolecular composition contains the following components by weight parts: 50-80 parts of starch, 5-15 parts of polyvinyl alcohol, 7-15 parts of polyalcohol, 5-10 parts of organic aldehyde compound and 0.1-0.5 part of initiator. The starch and polyvinyl alcohol used in the invention areall high molecular materials which are easy to be biologically degraded, thus being beneficial to eliminate white pollution and protect the environment; and production technology is simple, and degradation effect is obvious, thus being easy for industrialized production.

Description

technical field [0001] The invention relates to a starch-based degradable plastic, which belongs to the technical field of international patent classification C08J5 / 00 "manufacturing of products or molding materials containing polymer substances". Background technique [0002] The extensive use of plastics has produced many disposable plastic wastes that cannot be recycled, causing increasingly serious "white pollution", such as groundwater pollution and soil pollution, and the destruction of animal and plant resources, seriously endangering human survival and health. Starch has the characteristics of regeneration, cheapness, easy storage and convenient transportation. Under certain conditions, it can undergo various reactions and derive many derivatives. The good recyclability and biodegradability of starch make it an excellent raw material for biodegradable materials. At present, although the cost of starch plastic products is 10% to 30% higher than that of ordinary plast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00
Inventor 王治
Owner 杨凌瑞丰环保科技有限公司
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