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Biodegradation composition, and preparation method and application thereof

A biodegradable and biodegradable resin technology, applied in the field of biodegradable compositions and their preparation, can solve the problems of poor processing performance, low mechanical properties, difficult practical application requirements, etc., achieve good physical properties and processing properties, and enhance water resistance. sexual effect

Active Publication Date: 2011-05-25
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In a word, the products of the method described in the above-mentioned patents have low mechanical properties, poor processability, insufficient usability, and are difficult to meet the requirements of practical applications.
The root cause is that the plasticization of starch is not enough

Method used

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  • Biodegradation composition, and preparation method and application thereof
  • Biodegradation composition, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Weigh each component according to the following weight percentages:

[0067] cornstarch 30

[0068] potato starch 30

[0069] Tapioca starch 30

[0070] Hydrochloric acid solution 10

[0071] The pH value of the hydrochloric acid solution is 4.5

[0072] According to the above ratio, pre-dry the weighed various starches in an oven at 80°C for 5 hours, then stir with hydrochloric acid solution in a high-speed mixer for 10 minutes at a low speed, and then leave after 4 minutes of high-speed stirring, and send them into the same phase twin-screw extrusion In the machine, extrude and granulate at a temperature of 100° C. to obtain the product dextrin, and the molecular weight of the obtained dextrin is 27961 g / mol.

Embodiment 2

[0074] Weigh each component according to the following weight percentages:

[0075] cornstarch 84

[0076] Sulfuric acid solution 16

[0077] The pH value of the sulfuric acid solution is 5.0

[0078] According to the above ratio, pre-dry the weighed various starches in an oven at 80°C for 5 hours, then stir with hydrochloric acid solution in a high-speed mixer for 10 minutes at a low speed, and then leave after 4 minutes of high-speed stirring, and send them into the same phase twin-screw extrusion In the machine, extrude and granulate at a temperature of 100° C. to obtain the product dextrin, and the molecular weight of the obtained dextrin is 33678 g / mol.

Embodiment 3

[0080] Weigh each component according to the following weight percentages:

[0081] Potato Starch 95

[0082] Phosphoric acid solution 5

[0083] The pH value of the sulfuric acid solution is 5.5

[0084] According to the above ratio, pre-dry the weighed various starches in an oven at 80°C for 5 hours, then stir with hydrochloric acid solution in a high-speed mixer for 10 minutes at a low speed, and then leave after 4 minutes of high-speed stirring, and send them into the same phase twin-screw extrusion In the machine, extrude and granulate at a temperature of 100° C. to obtain the product dextrin, the molecular weight of the obtained dextrin is 39782 g / mol.

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Abstract

The invention discloses a biodegradation composition, and a preparation method and application thereof. The biodegradation composition consists of a biodegradation resin, dextrin and a plasticizer, wherein the mass ratio of the biodegradation resin to the dextrin is 1:9 to 9:1; the content of the plasticizer is 1 to 30 percent based on the total weight of the biodegradation composition; and the dextrin is prepared from the mixture of dried natural starch and acid solution in melting and mixing equipment. The biodegradation composition is prepared from the mixture of the components in the smelting and mixing equipment. The biodegradation composition provided by the invention has relatively higher physical properties and processability, relatively higher water resistance and medium biodegradation speed, well satisfies the needs of practical application, and can be prepared into various products by universal processing methods such as blowing molding, extrusion molding, injection molding, spinning molding and the like.

Description

Technical field [0001] The present invention involves the field of biodegradation materials, and specifically involves a biodegradable composition and its preparation methods and applications. Background technique [0002] GM plastic is widely used in various fields because of its excellent comprehensive performance. It is listed as four major support materials with steel, wood, and cement, and the annual usage continues to rise.GM plastic, such as polyethylene (PE), polypropylene (PP), and polystyrene (PS), can be stable for a long time in nature, and it is difficult to degrade. Therefore, it is difficult to recycle treatment after abandoning, causing serious pollution to the environment.Bio -degradation plastic has become one of the effective ways to solve the problem of environmental pollution of plastic waste in a natural environment, which has attracted great attention from people. [0003] Biodegradable plastic is a type of polymer material that can be decomposed into carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L67/00C08L67/04C08L67/02C08B30/18D01F8/14D01F8/18
Inventor 焦建徐依斌苑仁旭钟宇科曾祥斌蔡彤旻夏世勇袁志敏
Owner KINGFA SCI & TECH CO LTD
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