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A kind of red light conversion agent for agricultural film and its preparation method and application

A light-converting agent, agricultural film technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as affecting the life of agricultural film, accelerating the aging of agricultural film, and giving off bad odor, and achieves enhancement of ultraviolet light absorption. Damage, enhance the effect of luminous intensity

Active Publication Date: 2018-11-02
山东东大塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, rare earth inorganic compounds mostly contain sulfur elements. The 2015 Agricultural Plastics Industry Association meeting pointed out that sulfur-containing compounds will accelerate the aging of agricultural film, so the use of sulfur-containing rare earth inorganic compounds may affect the life of agricultural film, and sulfur-containing rare earth Inorganic composite light conversion masterbatch is not only easy to be affected by moisture, but also emits a foul smell during processing

Method used

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  • A kind of red light conversion agent for agricultural film and its preparation method and application
  • A kind of red light conversion agent for agricultural film and its preparation method and application
  • A kind of red light conversion agent for agricultural film and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The red light conversion agent for agricultural film uses the rare earth ion Eu(Ⅲ) as the central ion, PSF-SB as the main ligand, and SC as the synergistic ligand. Its general chemical formula is: PSF-(SB) 3 -Eu(Ⅲ)-(SC) 3 , where: PSF-SB is the functionalized polysulfone with benzaldehyde / p-aminobenzoic acid Schiff base ligand bonded to the side chain, and SC is 7-hydroxycoumarin-4-acetic acid.

[0032] The preparation method of the red light conversion agent for agricultural film adopts the following steps:

[0033] (1) Preparation of chloromethylated polysulfone CMPSF by Friedel-Crafts alkylation reaction:

[0034] Weigh 20g of polysulfone PSF, dissolve it completely in 150ml of dichloromethane solvent, and prepare a polysulfone solution, then add 20ml of chloromethylation reagent 1,4-dichloromethylbutane BCMB, with SnCl 4 As a catalyst, react at room temperature for 4 hours under stirring conditions to obtain a product solution;

[0035] The catalytic reaction equ...

Embodiment 2

[0060] The red light conversion agent for agricultural film uses the rare earth ion Eu(Ⅲ) as the central ion, PSF-SB as the main ligand, and SC as the synergistic ligand. Its general chemical formula is: PSF-(SB) 3 -Eu(Ⅲ)-(SC) 3 , where: PSF-SB is a functionalized polysulfone with benzaldehyde / p-aminobenzoic acid Schiff base ligand bonded to the side chain, and SC is 6,7-dimethoxycoumarin.

[0061] The preparation method of the red light conversion agent for agricultural film is the same as the steps (1)-(4) of Example 1, and the step (5) is:

[0062] Dissolve 1 mol of functionalized polysulfone PSF-SB with benzaldehyde / p-aminobenzoic acid Schiff base ligand bonded to the side chain and 2-3 mol of coumarin derivative SC in N,N-dimethylformamide DMF solvent , prepare a mixed solution of functionalized polysulfone PSF-SB and 7-hydroxycoumarin-4-acetic acid with side chain bonded benzaldehyde / p-aminobenzoic acid Schiff base ligand, and then add 1mol Eu(NO 3 ) 3 , and react at...

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Abstract

The invention relates to a red light conversion agent for agricultural film and a preparation method and application of the red light conversion agent. According to the red light conversion agent for the agricultural film, rare earth ions Eu (III) are adopted as central ions, PSF-SB is adopted as a main ligand, SC is adopted as a coligand, and the general chemical formula of the red light conversion agent is PSF-(SB)m-Eu(III)-(SC)n. The preparation method of the red light conversion agent for the agricultural film comprises the steps of 1, chloromethyl polysulfone is prepared; 2, polysulfone with a side chain bonded with benzaldehyde is prepared; 3, functional polysulfone with a side chain bonded with benzaldehyde / Schiff base p-aminobenzoate ligands is prepared; 4, rare earth ions are prepared; 5, a main ligand and a coligand are coordinated with the rare earth irons Eu (III). According to the red light conversion agent for the agricultural film, ultraviolet light in sunlight irradiating the agricultural film can be effectively converted into light beneficial to plant photosynthesis, the utilization rate of crops on sunlight energy is increased, and when the red light conversion agent is added to the PE and EVA agricultural film, greenhouse temperature can be effectively raised. After the red light conversion agent is applied to the agricultural film, the transparency of the agricultural film is guaranteed, the mechanical property of the agricultural film is improved, and the quality of the light transmitting the agricultural film can be improved.

Description

(1) Technical field [0001] The invention relates to a red light conversion agent for agricultural film and its preparation method and application. (2) Background technology [0002] Solar energy is one of the important factors for photosynthesis of crops, and is a necessary condition for the growth, development and results of crops. The application of plastic films in agriculture is a very important progress in the utilization of solar energy. Photoecological studies have shown that blue-violet light of 380-480nm and red-orange light of 600-700nm are beneficial to photosynthesis of plants, while ultraviolet light is likely to cause aging of agricultural film. The 380nm ultraviolet light is converted into blue light and red-orange light, which can not only reduce the damage of ultraviolet light to the agricultural film, but also make the sunlight passing through the agricultural film more conducive to the photosynthesis and growth of crops, and improve the crop's ability to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06
CPCC08G83/00C09K11/06C09K2211/182
Inventor 程立春张洪运李长方
Owner 山东东大塑业有限公司