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A kind of biodegradable plastic resin and its preparation process

A technology of biodegradable plastics and preparation process, which is applied in the field of biodegradable plastic resins and its preparation, which can solve the problems of difficult photodegradation and achieve the effects of short degradation time, improved tensile strength, and increased plastic strength

Active Publication Date: 2018-10-12
陈少双
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the degradation mechanism of this product is through the immersion of microorganisms to break the long-chain molecular chain and cause the degradation of starch plastics. Therefore, its degradation rate is affected by factors such as soil humidity, temperature and pH value, as well as the content of metal salts in the soil and fertility. Influenced by the influence of mulch film on the ground, especially the part of the ground cover, photodegradation is more difficult, so there are certain limitations in the popularization and application of agricultural mulch film

Method used

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  • A kind of biodegradable plastic resin and its preparation process
  • A kind of biodegradable plastic resin and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A biodegradable plastic resin, consisting of the following parts by weight: 80 parts of polylactic acid, 50 parts of polyvinyl alcohol, 60 parts of modified starch, 20 parts of cellulose, 15 parts of glycerin, 12 parts of maleic anhydride, graphene 15 parts, 25 parts of chitosan, 6 parts of Ce-modified titanium dioxide, and 8 parts of photocatalyse. The diameter of the Ce-modified titanium dioxide is 40-50 nm.

[0023] The preparation technology of described biodegradable plastic resin, comprises the following steps:

[0024] (1) Add cyclohexane and ethanol to the mixture of starch, stir evenly, microwave for 2 hours, heat up to 80°C, slowly add hydrochloric acid and potassium permanganate, and keep warm for 1 hour;

[0025] (2) Add sodium hydroxide solution to the mixing system in step (1), adjust the pH to 10, adjust the system temperature to 70°C, add polylactic acid and polyvinyl alcohol to ultrasonic for 30 minutes, then add maleic anhydride, and raise the temperat...

Embodiment 2

[0029] A biodegradable plastic resin, consisting of the following parts by weight: 80 parts of polylactic acid, 80 parts of polyvinyl alcohol, 50 parts of modified starch, 10 parts of cellulose, 28 parts of glycerin, 12 parts of maleic anhydride, Ketjen 10 parts of carbon black, 15 parts of chitosan, 15 parts of Ce-modified titanium dioxide, and 5 parts of photocatalystase. The diameter of the Ce-modified titanium dioxide is 40-50 nm.

[0030] The preparation technology of described biodegradable plastic resin, comprises the following steps:

[0031] (1) Add ethyl acetate to the starch, stir evenly, microwave for 2.5 hours, heat up to 70-90°C, slowly add hydrochloric acid and potassium permanganate, and keep warm for 2 hours;

[0032] (2) Add sodium hydroxide solution to the mixing system in step (1), adjust the pH to 12, adjust the system temperature to 60°C, add polylactic acid and polyvinyl alcohol to ultrasonic for 60 minutes, then add maleic anhydride, and raise the tempe...

Embodiment 3

[0036] A biodegradable plastic resin, consisting of the following parts by weight: 100 parts of polylactic acid, 70 parts of polyvinyl alcohol, 30 parts of modified starch, 25 parts of cellulose, 22 parts of glycerin, 15 parts of maleic anhydride, carbon nano 8 parts of tubes, 20 parts of chitosan, 10 parts of Ce-modified titanium dioxide, and 3 parts of photocatalyse. The diameter of the Ce-modified titanium dioxide is 30-40 nm.

[0037] The preparation technology of described biodegradable plastic resin, comprises the following steps:

[0038] (1) Add acetone to the starch, stir evenly, microwave for 3 hours, heat up to 70°C, slowly add hydrochloric acid and potassium permanganate, and keep warm for 3 hours;

[0039] (2) Add sodium hydroxide solution to the mixing system in step (1), adjust the pH to 10, adjust the system temperature to 50°C, add polylactic acid and polyvinyl alcohol to ultrasonic for 30 minutes, then add maleic anhydride, and raise the temperature to 120°C ...

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Abstract

The present invention provides a biodegradable plastic resin and a preparation process thereof, and relates to the technical field of plastic resins, wherein the biodegradable plastic resin comprises polylactic acid, polyvinyl alcohol, modified starch, cellulose, glycerol, maleic anhydride, a carbon-based reinforcing material, chitosan, modified titanium dioxide, and a photocatalyst. According to the present invention, the biodegradable material is adopted as the main component and the additive is added to prepare the biodegradable plastic resin; and the contents of various components of the film are the key, wherein the good mechanical property is provided, the biodegradability is high, and the degradation time is short, wherein the biodegradable plastic resin is almost completely degraded within 15 under the illumination condition, and the biodegradable plastic resin can be completely degraded within 1 month under the dark condition.

Description

technical field [0001] The invention relates to the technical field of plastic resins, in particular to a biodegradable plastic resin and a preparation process thereof. Background technique [0002] With the improvement of people's living standards, the requirements for the environment are getting higher and higher. At the same time, countries are paying more and more attention to the protection of the environment. Plastic is a very common material in daily life and industrial production. The degradation rate is very slow, even non-degradable, resulting in white pollution. In this regard, there are more and more researches and developments on biodegradable resins. At present, there are also many degradable materials produced and used in some daily life Among them, such as garbage bags, shopping bags, etc., are generally degradable materials (such as photodegradation, oxidative degradation, etc.), although they bring the excellent performance of degradability, but at the same...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L29/04C08L1/02C08L5/08C08L3/04C08K13/06C08K9/02C08K3/22C08K3/04C08K5/1539C08K5/053C08K7/24C08K7/06
CPCC08K2201/003C08K2201/011C08L67/04C08L2201/06C08L2205/035C08L29/04C08L1/02C08L5/08C08L3/04C08K13/06C08K9/02C08K2003/2241C08K3/04C08K5/1539C08K5/053C08K7/06C08K7/24
Inventor 陈少双
Owner 陈少双
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