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Light conversion plastic agricultural film with long service life and preparation method thereof

A life-span and light-converting technology, applied in botany equipment and methods, agriculture, applications, etc., can solve problems such as poor light-converting efficiency and light-thermal stability, poor dispersion of deliquescence-resistant films, oxidation and decomposition of light-converting agents, etc. Achieve good light conversion effect, excellent light transmittance, and prevent the effect of oxidative decomposition process

Inactive Publication Date: 2018-04-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the inorganic rare earth light-converting agents widely used in light-converting agricultural films at present have the defects of deliquescence resistance and poor dispersion in the film; organic fluorescent dye-based light-converting agents are prone to oxidation and decomposition, resulting in film light-conversion The effect is reduced, the service life is short, and the light conversion efficiency and photothermal stability are poor. However, the current technical method for extending its service life is complicated to operate and high in cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 72kg of ethanol solution with a mass concentration of 50%, 3kg of stearic acid and 3kg of liquid glass into the jacketed stirring tank, and heat to 70°C while stirring at a speed of 120r / min to completely dissolve the stearic acid and liquid glass. Then add 25kg of sodium fluorescein, transfer to an ultrasonic disperser with a frequency of 22kHz, disperse evenly at room temperature, vibrate, filter with suction, and vacuum-dry at 60°C for 8 hours to obtain stearic acid and liquid glass-coated Sodium fluorescein; mix 10kg of stearic acid and liquid glass-coated sodium fluorescein with 78kg of low-density polyethylene, 1.5kg of thermoplastic starch, 0.1kg of 2,2-diphenyl-1-trinitrophenylhydrazine, 0.5kg of sulfur Dilauryl dipropionate, 6kg of long-chain fatty acid ester and 0.5kg of paraffin were premixed evenly, and then extruded and blown. The composite film obtained was a high-life light-converting plastic agricultural film;

[0035] The light conversion plastic ag...

Embodiment 2

[0037]Add 74kg of ethanol solution with a mass concentration of 40%, 1kg of stearic acid and 4kg of liquid glass in a vertical stirring tank, and heat to 60°C while stirring at a speed of 100r / min to completely dissolve the stearic acid and liquid glass. Then add 25kg of fluorescein sodium, transfer to an ultrasonic disperser with a frequency of 18kHz, disperse evenly at room temperature, vibrate, filter with suction, and vacuum-dry at 50°C for 12h to obtain stearic acid and liquid glass-coated Sodium fluorescein; mix 10kg of stearic acid and liquid glass-coated sodium fluorescein with 81kg of low-density polyethylene, 1kg of thermoplastic starch, 0.2kg of p-benzoquinone, 0.3kg of tris(2,4-di-tert-butylphenyl) Phosphite, 5kg of medium-chain fatty acid ester and 0.4kg of polyethylene wax are pre-mixed evenly, and then extruded and blown. The composite film obtained is a long-life light-converting plastic agricultural film;

[0038] The light conversion plastic agricultural film...

Embodiment 3

[0040] Add 67kg of ethanol solution with a mass concentration of 46%, 3kg of stearic acid and 5kg of liquid glass in a vacuum stirred tank, and heat to 80°C while stirring at a speed of 110r / min to completely dissolve the stearic acid and liquid glass, and then Add 30kg of fluorescein sodium, transfer to an ultrasonic disperser with a frequency of 20kHz, disperse evenly at room temperature, shake, filter with suction, and dry in vacuum at 55°C for 10h to prepare stearic acid and liquid glass-coated fluorescent Sodium fluorescein; mix 7kg stearic acid and liquid glass-coated fluorescein sodium with 80kg low-density polyethylene, 3kg thermoplastic starch, 0.2kg tetramethylbenzoquinone, 0.3kg1,3,5-tri(3,5-di tert-butyl-4-hydroxybenzyl) isocyanuric acid, 6kg medium-chain fatty acid ester and 0.3kg oxidized polyethylene wax are premixed evenly, and then extrusion blow molding is carried out, and the composite film obtained is a high-life phototransfer film. Plastic agricultural fil...

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Abstract

The invention belongs to the technical field of film preparation, and provides a light conversion plastic agricultural film with long service life and a preparation method thereof. The method comprises the following steps: stirring and dissolving an alcohol solution, stearic acid and liquid glass, and adding sodium fluorescein; performing dispersion, oscillation, suction filtration and vacuum drying to prepare stearic acid and liquid glass coated sodium fluorescein; mixing a film base material, thermoplastic starch, a light stabilizer, an antioxidant, an antifogging agent and a lubricating agent, extruding and performing blow molding to obtain the light conversion plastic agricultural film with long service life. Compared with a traditional method, the method has the advantages that a compact protective layer is formed by using stearic acid and liquid glass coated sodium fluorescein, oxygenolysis of sodium fluorescein can be effectively prevented, and the light conversion plastic agricultural film has relatively light-heat performance, good light conversion effect and long service life; and the preparation process is simple in operation and relatively low in cost, and has a wide application range.

Description

technical field [0001] The invention belongs to the technical field of film preparation and provides a long-life light-converting plastic agricultural film and a preparation method thereof. Background technique [0002] In recent years, the functionalization and high performance of agricultural film have become the mainstream of agricultural film development. The design principle of light conversion of agricultural film is based on the principle of photoecology. It can improve the quality of transmitted light and improve the comprehensive utilization rate of light energy. Compared with ordinary films and existing functional films, it has more obvious advantages in terms of crop yield increase, early maturity, and quality improvement. Therefore, the most critical thing in the application of light-changing plastic agricultural film is the research and application of light-changing agents. [0003] Light-transforming agents are a class of chemical substances that can convert h...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L3/02C08K13/06C08K9/10C08K5/1545C08J5/18A01G9/14
CPCA01G9/1438C08J5/18C08J2323/06C08J2403/02C08K5/1545C08K9/10C08K13/06Y02A40/25
Inventor 陈庆贯大为
Owner CHENDU NEW KELI CHEM SCI CO LTD
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