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Biodegradable light conversion film and preparation method thereof

A technology of biodegradable and light-converting film, which is applied in botany equipment and methods, plant protection, plant protection covers, etc., can solve the problems of crop yield reduction, difficulty in recycling, soil structure damage, etc., to improve yield and quality, Significant economic and social significance, effect of reducing accumulation

Active Publication Date: 2019-01-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mulch films currently used in my country are mainly polyethylene and polyvinyl chloride mulch films, which are extremely difficult to degrade, and the degradation cycle can reach hundreds of years
And after the plastic film is aged and broken, the residual film is not easy to degrade in the land, it is difficult to recycle, and the accumulation of soil will cause land pollution, serious damage to the soil structure, loss of fertility, and reduced crop yield. sex and intractable harm

Method used

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  • Biodegradable light conversion film and preparation method thereof
  • Biodegradable light conversion film and preparation method thereof
  • Biodegradable light conversion film and preparation method thereof

Examples

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preparation example Construction

[0050] The present invention also provides a preparation method of a biodegradable light converting agent, comprising the following steps:

[0051] Mechanically blend 60-64.7 parts of polybutylene adipate-terephthalate, 35 parts of polylactic acid, 0.1-2 parts of lubricant, 0.1-2 parts of blocking agent and 0.1-1 part of light-changing agent in sequence , extrusion granulation and film blowing to obtain a biodegradable light conversion film.

[0052] In the present invention, the types, sources and amounts of each raw material are consistent with the types, sources and amounts of each raw material mentioned above, and will not be repeated here.

[0053] In the present invention, the mechanical blending is a commonly used mixing method in the field, and the present invention does not make special restrictions on this, as long as all materials can be mixed evenly, the time of the mechanical blending is preferably 3 to 10 minutes, more preferably Preferably it is 5 minutes.

[...

Embodiment 1

[0065]

[0066] According to the above ratio, the dry polybutylene adipate-terephthalate, polylactic acid, light-changing agent, lubricant, anti-blocking agent were mechanically blended for 5 minutes, and then the mixed materials were added to the twin-screw extruder. Melt extrusion and granulation in the extruder to obtain light-changing blown film resin; the set temperature of the twin-screw extruder is: zone 1: 165-175°C, zone 2: 165-180°C, zone 3: 165-190°C ℃, Zone 4: 165-190℃, Zone 5: 165-190℃, Zone 6: 165-190℃, Zone 7: 165-190℃, Zone 8: 165-190℃, Head: 165-190℃, Screw speed: 100-300rpm. The set temperature of the film blowing machine is: Zone 1: 155-160°C, Zone 2: 165-175°C, Zone 3: 165-175°C, Zone 4: 165-175°C, Zone 5: 180-195°C, the host Screw speed: 50~300rpm, traction speed 2~6m / min, inflation ratio 2~6. The thickness of the film was controlled at 0.04mm, and the mechanical properties and fluorescence spectrum of the film were tested. The test results are listed...

Embodiment 2

[0068]

[0069] In this example, the extrusion granulation and film blowing process are the same as in Example 1, the thickness of the film is controlled at 0.04mm, and the mechanical properties and light transmittance of the film are tested. The test results are listed in Table 1.

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Abstract

The invention provides a biodegradable light conversion film which is prepared from the following components in parts by weight: 60-64.7 parts of poly (butyleneadipate-co-terephthalate), 35 parts of polylactic acid, 0.1-2 parts of a lubricant, 0.1-2 parts of an opening agent and 0.1-1 part of a light conversion agent; and the light conversion agent is an organic complex formed by rare-earth europium and alpha-thenoyltrifluoroacetone and triphenylphosphine oxide. The poly (butyleneadipate-co-terephthalate) and the polylactic acid are used as a polymer matrix, the light conversion agent is synthesized by using the rare earth europium and organic small molecule ligands, ultraviolet light can be effectively absorbed, red light can be emitted to meet the growth requirements of plants, meanwhile, the biodegradable light conversion film has biological degradation performance, and the accumulation of a mulching film in a soil tilling layer can be reduced. The biodegradable light conversion film disclosed by the invention is wide in application field, can replace traditional PE (polyethylene) mulching films and the like for crop cultivation, and has a wide market prospect. The invention further provides a preparation method of the biodegradable light conversion film.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a biodegradable light conversion film and a preparation method thereof. Background technique [0002] Agricultural mulch can increase soil temperature, maintain soil moisture and fertility, prevent pests from invading crops, promote plant growth and increase crop yield, so mulch has been widely used in modern agriculture. As a large agricultural country, the output of agricultural plastic film in my country ranks first in the world, with an annual output of about 600,000 tons and an area of ​​about 14.7 million hectares. However, the mulch films currently used in my country are mainly polyethylene and polyvinyl chloride mulch films, which are extremely difficult to degrade, and the degradation cycle can reach hundreds of years. And after the plastic film is aged and broken, the residual film is not easy to degrade in the land, it is difficult to recycle, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08K5/00C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2367/02C08J2467/03C08K5/0091Y02A40/28
Inventor 张会良于银雷边俊甲贾世玲杨慧丽董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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