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Starch modified PBAT/PLA biodegradable plastic film and preparation method thereof

A biodegradation and starch modification technology, applied in the field of polymer materials, can solve the problems of weak mechanical ability of thin film materials, limited application range, complicated process, etc., and achieve the effects of low production cost, short operation time and simple preparation process.

Pending Publication Date: 2021-12-31
SHANGHAI FUMING NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method prepares biodegradable film materials, the process is complicated, the energy consumption is high, and the mechanical capacity of the film materials is weak, and it is easy to break when subjected to high pressure, which limits its application range.

Method used

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  • Starch modified PBAT/PLA biodegradable plastic film and preparation method thereof
  • Starch modified PBAT/PLA biodegradable plastic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A starch-modified PBAT / PLA biodegradable plastic film, in parts by weight, comprises the following components:

[0049] 60 parts of PBAT, 20 parts of PLA, 20 parts of modified starch, 1 part of MDI, 2 parts of PEG400, 0.6 parts of erucamide, 0.5 parts of antioxidant 1010, 2-(2-hydroxy-5-methylphenyl)benzene 0.5 part of triazole, 0.1 part of ADR4468.

[0050] The preparation method is:

[0051] S1. Prepare modified starch, the specific components are: 100 parts of starch with a water content of 8-10%, 0.5 parts of epoxidized soybean oil, 20 parts of glycerin, 10 parts of citric acid, 1 part of stearic acid, coupling agent KH560 2 5 parts, 5 parts of maleic anhydride, 0.5 parts of cumene peroxide.

[0052] Weigh the starch, glycerin and citric acid in proportion, stir at room temperature for 30 minutes, add stearic acid and coupling agent, stir at room temperature for 5 minutes, then add maleic anhydride and cumene peroxide, and stir at room temperature for 5 minutes to...

Embodiment 2

[0058] A starch-modified PBAT / PLA biodegradable plastic film, in parts by weight, comprises the following components:

[0059] 60 parts of PBAT, 30 parts of PLA, 10 parts of modified starch, 5 parts of PLA-g-MAH, 2 parts of glycerin, 0.6 parts of oleic acid amide, 0.6 parts of antioxidant 1010, 2-hydroxy-4-methoxydiphenyl Methanone 0.5 part, ADR4400 0.1 part.

[0060] S1. Prepare modified starch, the specific components are: 100 parts of starch with a water content of 8-10%, 0.6 parts of epoxidized soybean oil, 30 parts of glycerin, 5 parts of citric acid, 1 part of stearic acid, coupling agent KH550 2 5 parts, 5 parts of maleic anhydride, 0.5 parts of cumene peroxide.

[0061] All the other steps are the same as in Example 1.

Embodiment 3

[0063] A starch-modified PBAT / PLA biodegradable plastic film, in parts by weight, comprises the following components:

[0064] 50 parts of PBAT, 30 parts of PLA, 20 parts of modified starch, 5 parts of PHA, 1 part of ATBC, 0.5 parts of EBS, 0.6 parts of antioxidant 1010, 2-(2-hydroxy-5-methylphenyl)benzotri 0.5 part of azole, 0.2 part of ADR4468.

[0065] S1. Prepare modified starch, the specific components are: 100 parts of starch with a water content of 8-10%, 0.7 parts of epoxidized soybean oil, 15 parts of glycerin, 10 parts of citric acid, 1 part of stearic acid, and 1 part of coupling agent KH560 0.5 parts, coupling agent titanate coupling agent 201, 6 parts of maleic anhydride, 0.6 parts of cumene peroxide.

[0066] All the other steps are the same as in Example 1.

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a starch modified PBAT / PLA biodegradable plastic film. The preparation method comprises the following steps: preparing thermoplastic starch, and modifying the thermoplastic starch with maleic anhydride and dicumyl peroxide to prepare modified starch; carrying out melt blending granulation on poly (butylene terephthalate-adipate), polylactic acid, the modified starch and an auxiliary agent, and finally carrying out film blowing to obtain the starch modified biodegradable plastic film. Compared with the original starch, the modified starch prepared by the invention has the advantages that the processability is improved, the modified starch has thermoplasticity, and meanwhile, the degradation property is not influenced. The method is simple in modification process and low in production cost, molecular chains of the starch / PBAT / PLA high polymer material are kept to be mutually crossed, and the mechanical strength and toughness of the composite material are improved, so that the application scene of the composite material is expanded. Moreover, the starch is low in cost, raw materials are easy to obtain, and the starch can serve as a filler, so that the production cost of the composite material can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a starch-modified PBAT / PLA biodegradable plastic film. The invention also provides a preparation method suitable for industrial production of the starch-modified PBAT / PLA biodegradable plastic film. Background technique [0002] With the advancement of science and technology and the increase of the global population, plastic materials have become one of the most widely used materials in life and industry. The environmental pollution and depletion of non-renewable natural resources caused by the extensive use of plastics have begun to attract public attention. It not only brings an increasing amount of solid waste, damages the environment and biological safety, but also consumes a huge amount of petroleum resources. Therefore, the replacement of petroleum-based plastics with bio-based and biodegradable polymers (bioplastics) is seen as an important shift, the...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L51/02C08K5/20C08K5/134C08K5/3475C08K5/132C08K5/098C08J5/18C08F251/00C08F222/06
CPCC08J5/18C08F251/00C08J2367/02C08J2467/04C08J2451/02C08K5/20C08K5/1345C08K5/3475C08K5/132C08K5/098C08F222/06
Inventor 孙兴广李琦房芬芬陈前
Owner SHANGHAI FUMING NEW MATERIAL TECH CO LTD
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