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Method for preparing starch ionomer and its modified fully degradable plastic

An ionomer, full-degradation technology, applied in the production of bulk chemicals, etc., can solve the problems of polyester blends such as the decline in mechanical properties, difficult to exceed the amount of addition, poor thermal stability, etc., to improve processing performance and increase processing viscosity , Improve the effect of mechanical properties

Active Publication Date: 2022-06-07
中化石化销售有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the addition of traditional thermoplastic starch leads to a decrease in the mechanical properties of polyester blends, making it difficult to add more than 50wt% of traditional modified thermoplastic starch elastomers in synthetic degradable polymer materials
In addition, thermoplastic starch elastomers still have problems such as narrow processing window, low processing viscosity, and poor thermal stability.

Method used

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  • Method for preparing starch ionomer and its modified fully degradable plastic
  • Method for preparing starch ionomer and its modified fully degradable plastic
  • Method for preparing starch ionomer and its modified fully degradable plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 1) Mix high amylose starch and water in a ratio of 1:0.1, and gelatinize at 80°C for 80min. The gelatinized high amylose starch, monosodium citrate, and dimethylol propionic acid were added to the supercritical carbon dioxide reaction kettle in a ratio of 1:0.3:0.8, and in a supercritical carbon dioxide fluid at 40 ° C and 12 MPa, in a fluidized bed. The reaction is carried out in the form of a reaction product, and the reaction product leaves the reactor with the carbon dioxide fluid, and is separated under reduced pressure to obtain a starch ionomer.

[0063] 2) Mix the synthesized starch ionomer and PLA at a ratio of 1:0.25, melt extrusion and granulation through twin-screw, and the extrusion temperature is 180°C to obtain a fully degradable plastic.

Embodiment 2

[0065] 1) Mix high amylose starch with water in a ratio of 1:0.2, and gelatinize at 90°C for 40min. The gelatinized high amylose starch, monosodium fumarate, and dimethylol propionic acid were added to the supercritical carbon dioxide reaction kettle in the ratio of 1:0.5:0.4, and the fluidized bed was carried out in the supercritical carbon dioxide fluid at 40 ° C and 10 MPa. The reaction is carried out in the form of carbon dioxide fluid, and the reaction product leaves the reactor with carbon dioxide fluid, and is separated under reduced pressure to obtain a starch ionomer.

[0066] 2) Mix the synthesized starch ionomer and PBAT at a ratio of 1:0.5, melt extrusion and granulation through twin-screw, and the extrusion temperature is 110°C to obtain a fully degradable plastic.

Embodiment 3

[0068] 1) Mix high amylose starch with water in a ratio of 1:0.5, and gelatinize at 100°C for 30min. The gelatinized high amylose starch, monosodium malate, and dimethylolbutyric acid were added to the supercritical carbon dioxide reaction kettle in the ratio of 1:0.8:0.3, and in a supercritical carbon dioxide fluid at 40 ° C and 8 MPa, in a fluidized bed. The reaction is carried out in the form of a reaction product, and the reaction product leaves the reactor with the carbon dioxide fluid, and is separated under reduced pressure to obtain a starch ionomer.

[0069] 2) Mixing the synthesized starch ionomer and PBS in a ratio of 1:3, and granulating by twin-screw melt extrusion, and the extrusion temperature is 150° C. to obtain a fully degradable plastic.

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Abstract

The invention provides a method for preparing starch ionomer and its modified fully degradable plastic. Belonging to the field of polymer materials, the method includes: mixing high amylose starch and water, and performing gelatinization treatment to obtain gelatinized products; reacting the gelatinized products with organic acid salts and dihydroxy carboxylic acids to obtain the obtained The above-mentioned starch ionomer. The starch ionomer can be used to prepare fully degradable plastics, and the prepared fully degradable plastics can effectively reduce the cost of the fully degradable plastics while ensuring mechanical properties.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing a starch ionomer and a modified fully degradable plastic thereof. Background technique [0002] With the rapid increase in the number of non-degradable polymers in recent years, environmental problems have become more and more serious. Among them, non-degradable polymer membranes are particularly polluted due to their difficulty in recycling. Therefore, it is imperative to study degradable polymer film materials to replace non-degradable polymer films. Among many degradable polymers, starch, as a natural polymer, is considered to be one of the most promising raw materials for degradable polymer films due to its abundant sources, short regeneration cycle, low cost, and good degradability. However, the intermolecular and intramolecular hydrogen bonds of starch macromolecules bring difficulties to starch processing. The usual solution is to add pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B33/02C08L3/16C08L67/04C08L67/02B29B9/06B29B9/12
CPCC08B33/02C08L3/16C08L67/02B29B9/06B29B9/12C08L2201/06C08L2203/16C08L67/04Y02P20/54
Inventor 李波梁胜轲王武聪金华杜中杰孙佩鑫侯斌
Owner 中化石化销售有限公司
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