A kind of biodegradable light conversion film and preparation method thereof

A biodegradable and light-converting film technology, applied in botany equipment and methods, plant protection, plant protection covers, etc., can solve problems such as crop yield reduction, soil structure damage, and residual film is not easy to degrade, so as to improve yield and quality , reduce accumulation, significant economic and social effects

Active Publication Date: 2021-02-05
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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  • A kind of biodegradable light conversion film and preparation method thereof
  • A kind of biodegradable light conversion film and preparation method thereof
  • A kind of biodegradable light conversion film and preparation method thereof

Examples

Experimental program
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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 made of the following components in parts by weight: polybutylene adipate-terephthalate: 60-64.7 parts; polylactic acid: 35 parts; lubricating agent: 0.1-2 parts; opening agent: 0.1-2 parts; light-changing agent: 0.1-1 part; the light-changing agent is an organic compound formed by rare earth europium, α-thienoyl trifluoroacetone and triphenylphosphine Complexes. The invention uses polybutylene adipate-terephthalate and polylactic acid as the polymer matrix, and synthesizes a light-changing agent with rare earth europium and organic small molecule ligands, which can effectively absorb ultraviolet light and emit red light in line with the requirements of plants. Growth requirements, and at the same time have biodegradable properties, reduce the accumulation of mulch film in the soil arable layer. The degradable light-converting film of the present invention has a wide range of applications, and can replace traditional PE mulch films for crop cultivation, and has broad market prospects. The invention also 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 Patents(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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