Light conversion agent composition and preparation thereof, preparation of light conversion agricultural film

The technology of a composition and a light-converting agent is applied in the field of light-converting agent composition and its preparation, and in the field of preparing light-converting agricultural film, which can solve the problems of inability to effectively prevent film aging, uneven dispersion of light-converting agent, lack of weather resistance and the like, Achieve the effect of being beneficial to photosynthesis, improving the intensity of red light and reducing disease

Inactive Publication Date: 2008-10-08
杨凌冠阳农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the defect of this kind of light conversion film is that the luminous intensity is low, and there is no long weather resistance, that is, it cannot effectively prevent the aging of the film and prolong the service life. Under the conditions of use, the light conversion agent decays quickly in the film; The optical agent is blended into the polymer, resulting in uneven dispersion of the optical agent in the polymer and easy loss; moreover, some polyolefin films are more toxic and more harmful to crops

Method used

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  • Light conversion agent composition and preparation thereof, preparation of light conversion agricultural film
  • Light conversion agent composition and preparation thereof, preparation of light conversion agricultural film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] Brightening agent composition A x B y C z , A selects europium nitrate for use, B selects o-phenanthroline for use, C selects silica gel for use, and selects x: y: z as 1: 1.1: 1;

[0022] Dissolve 2.0 grams of europium nitrate in 20 milliliters of water, add 2.0 grams of silica gel-containing water suspension, stir the resulting mixture for one hour, and distill off the solvent; then add 50 milliliters of toluene to the obtained powder, add and dissolve A solution of 2.2 g of o-phenanthroline in 15 ml of toluene; the mixture was stirred for 3 hours at a temperature of 70° C., filtered, and dried at a temperature of 100° C. to obtain 6 g of a light-changing agent composition with a yield of 97%.

[0023] The above-mentioned light-changing agent composition is mixed with a polyethylene base material to prepare a film, the mass ratio is: 99.9705% of polyethylene, 0.0295% of the light-changing agent composition, and blown into a film.

Embodiment approach 2

[0025] Brightening agent composition A x B y C z , A selects europium hexafluoroacetylacetonate, B selects o-phenanthroline, and C selects CaCO 3 , select x:y:z as 1:0.5:7;

[0026] Dissolve 1.0 g of europium hexafluoroacetylacetonate in 20 mL of C 2 h 5 OH, add 7.0 g CaCO 3 The aqueous suspension of the obtained mixture was stirred for one hour, and the solvent was evaporated; then 50 milliliters of toluene was added to the obtained powder, and a solution of 0.5 grams of phenanthroline dissolved in 15 milliliters of toluene was added under stirring; at a temperature of 70 ° C, the The mixture was stirred for 3 hours, filtered, and dried at 100° C. to obtain 8.3 g of a light-changing agent composition with a yield of 98%.

[0027] The above-mentioned light-changing agent composition is mixed with a polyethylene base material to prepare a film, the mass ratio is: 99.8448% of polyethylene, 0.1552% of the light-changing agent composition, and blown into a film.

Embodiment approach 3

[0029] Brightening agent composition A x B y C z , A selects europium thienoyl trifluoroacetonate, B selects 2,2'-bipyridine, and C selects Al 2 o 3 , select x:y:z as 1:1.4:10;

[0030] Dissolve 1.0 g of europium thiophenoyltrifluoroacetonate in 20 ml of acetone, add 10 g of Al 2 o 3 The resulting mixture was stirred for one hour, and the solvent was evaporated; then 50 milliliters of toluene was added to the obtained powder, and 1.4 grams of 2,2'-bipyridyl solution dissolved in 15 milliliters of toluene was added under stirring; , the mixture was stirred for 3 hours, filtered, and dried at a temperature of 100° C. to obtain 11.8 g of a light-changing agent composition with a yield of 95%.

[0031] The above-mentioned light-changing agent composition is mixed with a polyethylene base material to prepare a film, the mass ratio is: 99.8558% of polyethylene, 0.1442% of the light-changing agent composition, and blown into a film.

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Abstract

The invention discloses a light conversion agent combination, and the preparation method of the combination as well as the method for preparing light conversion agricultural films. The light conversion agent combination is composed of Eu (III)-organic ligands and is coated on inert inorganic carriers, with the following general formula: AxByCz, wherein, A is a compound or chelate of europium; B is an organic ligand compound; C is an inorganic carrier; x, y and z respectively stand for the mass ratio of A, B and C, x: y: z ranges from 1:0.2: 0.1 to 1:4.5:100. The agricultural film prepared with the light conversion agent combination of the invention converts the ultraviolet light in the solar spectrum into red light and improves the luminous intensity of the red light in the agricultural films so as to enable the red light area to be increased by 10% to 40%, which facilitates the photosynthesis of crops, improves the output of the crops and speeds up the blossoming, riping and fruiting of the crops.

Description

technical field [0001] The invention belongs to the related field of polymer compositions, and relates to a light conversion agent composition used in agricultural polymer polyolefin films, a preparation method thereof, and a method for preparing light conversion agricultural films. Background technique [0002] Rare earth europium Eu organic ligand compounds are currently the most researched type of light energy conversion materials. Previously, some manufacturers used the rare earth ion europium Eu(III) as the luminescence center, and others have high energy transfer efficiency for Eu(III). Inorganic and organic acids with good photostability are used as light-changing agents for agricultural film as reaction synergistic ligand reagents. Among them, Dutch patent No189794 and CN1122814A point out that the rare earth light-changing agent containing europium can improve the light quality of the agricultural film, which is conducive to improving the photosynthesis of greenhous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/00C08L23/00C08J5/18
Inventor 李明田小武李庆伟刘全泰
Owner 杨凌冠阳农业科技有限公司
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