Method for preparing degradable material

A technology for degrading materials and lactic acid, which is applied in the field of degradable polylactic acid degradable materials, can solve the problems of small scope of use and strict requirements for storage conditions, and achieve the effect of good degradation performance.

Inactive Publication Date: 2013-01-16
SHANGHAI QIBAO HIGH SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This determines that its application range is smaller than that of general plastics, and its storage conditions are more stringent than those of general plastics.

Method used

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  • Method for preparing degradable material

Examples

Experimental program
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Embodiment Construction

[0016] combine figure 1 As shown; ① Take a certain amount of lactic acid (1.3g / L) in a three-necked bottle and heat it up to 150°C. Stir with a magnetic stirrer and remove water under normal pressure for 2h.

[0017] ② Vacuum drying in a vacuum oven to remove water for 4 hours to obtain lactic acid prepolymer (1.2g / L).

[0018] ③Add L-phenylalanine (1:1 molar ratio to lactic acid), add catalyst stannous chloride / p-toluenesulfonic acid (content: 1.5% molar ratio: 1:1) and continue the vacuum reaction at 180°C 12h, synthesize L-polylactic acid.

[0019] It can be seen from the detailed introduction of the present invention that the L-polylactic acid prepared by the method of the present invention has good degradation performance and is widely used in industry.

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Abstract

The invention provides a method for preparing a good degradable material, namely L-polylactic acid. The degradable material, namely the L-polylactic acid, which is prepared by the method is not limited to degradation conditions and can be widely applied in the industry.

Description

technical field [0001] The invention belongs to degradable materials, in particular to a method for degrading polylactic acid degradation materials. Background technique [0002] Plastics play an important role in everyday life. As a new type of material, plastic products have the advantages of light weight, waterproof, durable, and low cost. Since their inception, they have been widely used in industry, agriculture, fishery and other fields, and are very popular among people. [0003] However, while plastics are widely used, there are also huge hidden dangers. Most plastics are stable and difficult to be utilized and decomposed by microorganisms in the natural environment. According to reports, polyolefin materials cannot be completely degraded even in soil for 100 years. Due to the lack of attention to picking up and recycling plastic packaging products, a large amount of waste plastics remain in the natural environment, which seriously affects people's daily life. At ...

Claims

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Application Information

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IPC IPC(8): C08G63/06C08G63/78
Inventor 周国亮赵诣
Owner SHANGHAI QIBAO HIGH SCHOOL
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