CN114874610A - Red-blue double-peak gain light conversion material composition and preparation method and application thereof - Google Patents
Red-blue double-peak gain light conversion material composition and preparation method and application thereof Download PDFInfo
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- CN114874610A CN114874610A CN202210423975.XA CN202210423975A CN114874610A CN 114874610 A CN114874610 A CN 114874610A CN 202210423975 A CN202210423975 A CN 202210423975A CN 114874610 A CN114874610 A CN 114874610A
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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Abstract
The invention discloses a red-blue double-peak gain light conversion material composition and a preparation method and application thereof. The red-blue double-peak gain light conversion material composition comprises a sensitizing agent, a luminescent agent and a base material, wherein the sensitizing agent and the luminescent agent form a frequency up-conversion material which can emit blue light under the excitation of green light, and the sensitizing agent is also used as a frequency down-conversion material which can emit red light under the excitation of green light. The light conversion material composition provided by the invention not only can absorb ultraviolet light which is unfavorable for the growth of crops, but also can simultaneously convert green light which has little influence on photosynthesis into red light and blue light, namely light fertilizer, so that the light quality of sunlight is improved, the comprehensive utilization rate of the sunlight by the crops is improved, the growth and precocity of the crops are promoted, the yield is increased, the quality of the crops is improved, and the use amount of pesticides and fertilizers is reduced; in addition, the light conversion material composition can regulate and control the output intensity ratio of red light and blue light, and meets the requirements of different crops.
Description
Technical Field
The invention belongs to the technical field of light conversion agricultural films, and particularly relates to a red-blue double-peak gain light conversion material composition, a preparation method thereof and application thereof in agricultural films.
Background
Sunlight is a basic environmental factor for plant growth and development. The light quality of the plant growth regulator not only influences the photosynthetic efficiency of crops, but also can regulate and control the nutrient components of the crops. The red light with the wavelength of 600-700nm and the blue light with the wavelength of 400-500nm are the parts which are absorbed most by chlorophyll, and have the maximum optical activity; green light is physiologically ineffective light; the ultraviolet light is easy to cause the aging of the branches and the stems of the crops and the propagation of germs, and is unfavorable for the growth. The light conversion agricultural film is obtained by adding a certain light conversion agent into the agricultural film, green light which has little influence on the growth of crops due to ultraviolet light and photosynthesis is converted into 'light fertilizer', the light quality of sunlight is improved, the comprehensive utilization rate of light energy is improved, and the light conversion agricultural film is beneficial to promoting the growth and precocity of crops, increasing the yield and improving the quality of crops.
The agricultural film is an important production data in the development of modern agriculture, and plays an irreplaceable great role in increasing the yield and income of agriculture. With the rapid development of agricultural science and technology, the demand of agricultural films is increasing. At present, the national top-grade agricultural films only account for 2 percent of the total agricultural film production, the middle-grade agricultural films account for 20 percent, the low-grade products account for 78 percent, and the low-grade agricultural film products are over-supplied. Although the development of the photo-ecological agricultural film is successful in China, the photo-ecological agricultural film mainly adopts temperature rise, has narrow light conversion range and poor effect, has poor coincidence of red and blue light peaks and photosynthesis spectrum, has limited yield increasing effect, and basically has no effects of improving the quality of crops and lightening plant diseases and insect pests. Therefore, the development of efficient light conversion materials for agricultural films has become one of the important directions for improving the technical level of agriculture.
Disclosure of Invention
The invention mainly aims to provide a red-blue double-peak gain light conversion material composition, a preparation method thereof and application thereof in agricultural films.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides a red-blue double-peak gain light conversion material composition which comprises a sensitizing agent, a luminescent agent and a base material.
Further, the composition of the sensitizer and the luminescent agent as the frequency up-conversion material is capable of emitting blue light under excitation of green light.
Further, sensitizers as frequency down-converting materials are capable of emitting red light under green excitation.
In some embodiments, the sensitizer comprises any one or a combination of two or more of porphyrin metal complexes, phthalocyanine metal complexes, polypyridine metal complexes, organoalkyne metal complexes, fluoroboron derivatives, and the like.
In some embodiments, the luminescent agent comprises an aromatic fused ring compound.
The embodiment of the invention also provides a preparation method of the red-blue double-peak gain light conversion material composition, which comprises the following steps: heating a uniformly mixed system containing a sensitizer, a luminescent agent and a base material to 100-140 ℃ and curing for 1-5 hours to obtain the red-blue double-peak gain light conversion material composition.
The embodiment of the invention also provides application of the red-blue double-peak gain light conversion material composition in preparation of a light conversion agricultural film.
Correspondingly, the embodiment of the invention also provides a light conversion agricultural film, which comprises a light conversion master batch and an agricultural film base material, wherein the light conversion master batch is prepared from the red-blue double-peak gain light conversion material composition.
Compared with the prior art, the invention has the beneficial effects that:
(1) the red-blue double-peak gain light conversion material composition provided by the invention can absorb green light which is not utilized by plants, and utilizes frequency up-conversion and down-conversion technologies to realize the simultaneous output of red light and blue light, so that the light quality of sunlight is well improved, and the comprehensive utilization of the sunlight is improved;
(2) the red-blue double-peak gain light conversion material composition provided by the invention is applied to agricultural films, can promote the growth and precocity of crops, increase the yield, improve the quality of crops and reduce the use amount of chemical fertilizers;
(3) the red and blue double-peak gain light conversion material composition provided by the invention can change the output proportion of red and blue light by changing the proportion of the sensitizer and the luminescent agent during preparation, is applied to agricultural films, and can meet the requirements of different actions on red and blue light;
(4) the red and blue double-peak gain light conversion material composition provided by the invention can absorb ultraviolet light, can be applied to agricultural films to prevent the crop branches and trunks from aging, inhibit the propagation of germs and reduce the use of pesticides;
(5) the light conversion master batch prepared from the red-blue double-peak gain light conversion material composition provided by the invention can be used for preparing the agricultural film by using a conventional method, and is beneficial to large-scale popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a normalized luminescence spectrum of a sensitizer PdTPP and a luminescent agent DPA in a solution according to example 1 of the present invention;
FIG. 2 is a luminescence spectrum of PdTPP/DPA light conversion master batch based on isophorone diisocyanate in example 1 of the present invention;
FIG. 3a is a graph showing the upconversion effect when the molar ratio of PdTPP/DPA is 1: 90 in example 1 of the present invention;
FIG. 3b is a graph showing the effect of upconversion at a PdTPP/DPA molar ratio of 1: 10 in example 1 of the present invention.
Detailed Description
Aiming at the defects of the prior art, the inventor of the invention provides the technical scheme of the invention through long-term research and massive practice. The technical solution, its implementation and principles, etc. will be further explained as follows. It is to be understood, however, that within the scope of the present invention, each of the above-described features of the present invention and each of the features described in detail below (examples) may be combined with each other to form new or preferred embodiments. Not to be reiterated herein, but to the extent of space.
In one aspect, the present invention relates to a red-blue bimodal gain light conversion material composition, which comprises a sensitizer, a luminescent agent and a matrix material.
Wherein the sensitizer and the luminescent agent form a frequency up-conversion material which can emit blue light under the excitation of green light. Meanwhile, the sensitizer is also used as a frequency down-conversion material and can emit red light under the excitation of green light.
In some embodiments, the sensitizer includes any one or a combination of two or more of porphyrin metal complex, phthalocyanine metal complex, polypyridine metal complex, organoalkyne metal complex, fluoroboron derivative, and the like, but is not limited thereto.
Specifically, the porphyrin metal complex may include at least any one of porphyrin palladium complex, porphyrin platinum complex, and the like, such as PdTPP, Pd (meptp) 2 PdOEP, etc., but are not limited thereto.
Further, the polypyridine metal complex may include at least any one of polypyridine iridium complex, polypyridine ruthenium complex, polypyridine cerium complex, and the like, for example, IrCN, but is not limited thereto.
Further, the organic alkyne metal complex includes an organic alkyne platinum complex, but is not limited thereto.
In some embodiments, the light emitting agent includes an aromatic fused ring compound, and may be specifically selected from at least any one of pyrene, pyrene derivative, perylene derivative, anthracene derivative, and the like, such as DPA, DTACl, and the like, but is not limited thereto.
In some embodiments, the molar ratio of the sensitizer to the luminescent agent is 1: 1 to 1: 360. The red and blue double-peak gain light conversion material composition provided by the invention can change the output proportion of red and blue light by changing the proportion of the sensitizing agent and the luminescent agent during preparation, is applied to agricultural films, and can meet the requirements of different actions on the red and blue light.
In some embodiments, the matrix material comprises a transparent elastomeric polyurethane.
In another aspect of the embodiments of the present invention, there is provided a method for preparing the red-blue bimodal gain light conversion material composition, which includes: heating a uniform mixed system containing a sensitizer, a luminescent agent and a base material to 100-140 ℃ and curing for 1-5 hours to obtain the red-blue double-peak gain light conversion material composition.
In some embodiments, the method of making comprises: dissolving a sensitizer and a luminescent agent in an organic solvent according to a molar ratio of 1: 1-1: 360 in a vacuum environment, mixing the organic solvent with polyurethane for reaction, and then heating to 100-140 ℃ for curing for 1-5 hours to obtain the red-blue double-peak gain light conversion material composition.
Further, the concentration of the sensitizer in the uniform mixing system is 1-10 multiplied by 10 -5 mol/L。
Further, the organic solvent includes N, N 'dimethylacetamide, N' dimethylformamide and the like, but is not limited thereto.
In some embodiments, the method of preparing the matrix material polyurethane comprises:
mixing isocyanate and polyether polyol according to a molar ratio of 1.02: 1-4: 1, adding a catalyst, reacting at 70-90 ℃ for 1-4 h to obtain a prepolymer, adding a chain extender, and continuing to react for 1-5 h to obtain polyurethane, namely a matrix material.
Further, the polyether polyol comprises polytetrahydrofuran diol with the number average molecular weight of 1000-3000.
Further, the isocyanate includes any one or a combination of two or more of isophorone diisocyanate, methine diisocyanate, dicyclohexylmethane diisocyanate, and the like, but is not limited thereto.
Further, the catalyst may include dibutyltin dilaurate, but is not limited thereto. Wherein the mass ratio of the catalyst to the polyether polyol is 1-4: 100, namely, in another aspect, the percentage content of the catalyst relative to the polyether polyol is 1-4%.
Further, the chain extender may include 1, 4-butanediol, but is not limited thereto.
Further, the molar ratio of the chain extender to the isocyanate is 1: 1-1: 3.
In some more specific embodiments, the red-blue bimodal gain light conversion material composition can be prepared into a light conversion master batch, and the specific preparation method comprises the following steps:
mixing isocyanate and polyether polyol according to a molar ratio of 1.02: 1-4: 1, and processing according to a preparation process of the thermo-elastic polyurethane prepolymer. Adding a chain extender, reacting for 1-5 hours, dissolving a sensitizer and a luminescent agent in an organic solvent according to a molar ratio of 1: 1-1: 360, injecting the mixture into a polyurethane reaction system, uniformly stirring, heating to 100-140 ℃ in a vacuum environment, and curing for 1-5 hours. And adding the strip polymer into a granulator to obtain the light conversion master batch.
The embodiment of the invention also provides application of the red-blue double-peak gain light conversion material composition in the field of preparing light conversion agricultural films.
Correspondingly, the embodiment of the invention also provides a light conversion agricultural film, which comprises a light conversion master batch and an agricultural film base material, wherein the light conversion master batch is prepared from the red-blue double-peak gain light conversion material composition.
Further, the present invention comprises: adding the light conversion master batch into an agricultural film base material according to the mass content ratio of 0.1-11 wt%, and preparing to form the red-blue double-peak gain light conversion agricultural film.
The light conversion master batch prepared from the red-blue double-peak gain light conversion material composition provided by the invention can be used for preparing the agricultural film by using a conventional method, and is beneficial to large-scale popularization.
In conclusion, the red-blue double-peak gain light conversion material composition not only can absorb ultraviolet light which is unfavorable for the growth of crops, but also can simultaneously convert green light which has little influence on photosynthesis into red light and blue light, promote the growth and precocity of the crops, increase the yield and improve the quality of the crops. In addition, the red and blue double-peak gain light conversion material composition can regulate and control the output intensity ratio of red and blue light, and meets the requirements of different crops.
The technical solutions of the present invention will be described in further detail below with reference to several preferred embodiments and accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. The conditions used in the following examples may be further adjusted as necessary, and the conditions used in the conventional experiments are not generally indicated.
EXAMPLE 1 preparation of PdTPP/DPA Photoconverting Master batch based on Isofluorone diisocyanate
In this embodiment, the sensitizer used is porphyrin metal complex PdTPP, and the molecular structural formula is:
in this example, the anthracene derivative DPA was used as the luminescent agent, and the molecular structural formula is:
preparing red and blue double-peak gain light conversion master batch: under the atmosphere of nitrogen, adding isophorone diisocyanate (2.2g, 10.0mmol), polytetrahydrofuran diol (5.0g, 5.0mmol) and dibutyltin dilaurate with excessive catalyst into a three-neck round-bottom flask respectively, slowly heating to 85 ℃ to react for 3 hours to obtain a prepolymer, adding an N, N' -dimethylacetamide solution containing 1, 4-butanediol (0.46g) into the prepolymer, and continuing to react for 2 hours.
PdTPP and DPA are dissolved in N, N' -dimethylacetamide solution according to the molar ratio of 1: 1-1: 360, and the solution is added into the prepared polyurethane to be fully stirred and uniformly mixed. Distilling part of the solvent under reduced pressure, pouring into a mold, and curing in vacuum at 110 ℃ for 3 h. Adding the strip polymer into a granulator to obtain red and blue double-peak gain light conversion master batch, wherein the concentration of PdTPP in polyurethane is 1 multiplied by 10 -5 mol/L。
FIG. 1 is a normalized luminescence spectrum of sensitizer PdTPP and luminescent agent DPA in solution in example 1 of the present invention.
FIG. 2 is the luminescence spectrum of the PdTPP/DPA light conversion master batch based on isophorone diisocyanate. With the DPA doping ratio in the system from 10X 10 -5 The mol/L is gradually increased to 90 multiplied by 10 -5 And (3) mol/L, gradually weakening red fluorescence and gradually increasing blue fluorescence. The experimental result shows that the concentration ratio of the sensitizer and the luminescent agent of the system can be changed to well adjust the output ratio of red light and blue light, and the requirements of different crops on light can be met.
FIGS. 3a and 3b are graphs showing the effect of the above PdTPP/DPA upconversion based on isophorone diisocyanate, and FIG. 3a is an example of green light excited luminescence at a PdTPP to DPA doping molar ratio of 1: 90, from which it is clearly seen that blue fluorescence is clearly emitted. FIG. 3b shows an example of green-excited luminescence at a 1: 10 molar ratio of PdTPP to DPA doping, from which it is clearly seen that a distinct red fluorescence is emitted.
Example 2 preparation of a PdTPP/DPA light conversion masterbatch based on methine diisocyanate
The sensitizer and luminescent agent used in this example were the same as in example 1.
Preparing red and blue double-peak gain light conversion master batch: under the nitrogen atmosphere, methylene diisocyanate (1.7g, 10.0mmol), polytetrahydrofuran diol (2.5g, 2.5mmol) and dibutyltin dilaurate with excessive catalyst are respectively added into a three-neck round-bottom flask, and the temperature is slowly increased to 70 ℃ to react for 4 hours to obtain the prepolymer. Then, N' -dimethylformamide containing 1, 4-butanediol (0.46g) was added to the prepolymer, and the reaction was continued for 1 hour. PdTPP and DPA are dissolved in N, N' -dimethylformamide according to the molar ratio of 1: 360, and the solution is added into the prepared polyurethane to be fully stirred and uniformly mixed. ReducingAfter partial solvent is distilled under pressure, the mixture is poured into a mould and is solidified for 3 hours in vacuum at the temperature of 110 ℃. Adding the strip polymer into a granulator to obtain red and blue double-peak gain light conversion master batch, wherein the concentration of PdTPP in polyurethane is 10 multiplied by 10 -5 mol/L。
Example 3 preparation of PdTPP/DPA light conversion master batch based on dicyclohexylmethane diisocyanate
Preparing red and blue double-peak gain light conversion master batch: in a nitrogen atmosphere, dicyclohexylmethane diisocyanate (0.26g, 1.02mmol), polytetrahydrofuran diol (1g, 1.0mmol) and dibutyltin dilaurate in excess of catalyst are respectively added into a three-neck round-bottom flask, and the temperature is slowly increased to 90 ℃ for reaction for 1h to obtain the prepolymer. Then, N' -dimethylformamide containing 1, 4-butanediol (0.05g) was added to the prepolymer, and the reaction was continued for 2 hours. PdTPP and DPA are dissolved in N, N' -dimethylformamide solution according to the molar ratio of 1: 100, and the solution is added into the prepared polyurethane to be fully stirred and uniformly mixed. Distilling part of the solvent under reduced pressure, pouring into a mold, and curing in vacuum at 110 ℃ for 3 h. Adding the strip polymer into a granulator to obtain red and blue double-peak gain light conversion master batch, wherein the concentration of PdTPP in polyurethane is 5 multiplied by 10 -5 mol/L。
Example 4 Pd (MeTPP) based on isophorone diisocyanate 2 Preparation of DPA light conversion master batch
The sensitizer used in this example is a porphyrin metal complex Pd (MeTPP) 2 The molecular structural formula is:
in this example, the anthracene derivative DPA was used as the luminescent agent, and the molecular structural formula was the same as in example 1.
The preparation of the isophorone diisocyanate based polyurethane in this example was the same as in example 1.
Pd (MeTPP) 2 And DPA are dissolved in N, N' -dimethylacetamide according to the molar ratio of 1: 24-1: 240, and the solution is added into the prepared polyurethane to be fully stirred and uniformly mixed. Distilling part of the solvent under reduced pressure, pouring into a mold, and curing in vacuum at 110 ℃ for 3 h. The strip-shaped polymer is added into a granulator,obtaining red and blue double peak gain light conversion master batch Pd (MeTPP) 2 The concentration in polyurethane is 2X 10 - 5 mol/L。
Example 5 preparation of PdOEP/DTACl light conversion master batch based on Isofluorone diisocyanate polyurethane
In this embodiment, the sensitizer used is porphyrin metal complex PdOEP, and the molecular structural formula is:
in this example, the anthracene derivative DTACl was used as the luminescent agent, and the molecular formula is:
the preparation of the isophorone diisocyanate based polyurethane in this example was the same as in example 1.
PdOEP and DTACl are dissolved in N, N' -dimethylacetamide according to the molar ratio of 1: 150, and the solution is added into the prepared polyurethane to be fully stirred and uniformly mixed. Distilling part of the solvent under reduced pressure, pouring into a mold, and vacuum curing at 100 ℃ for 5 h. Adding the strip polymer into a granulator to obtain red and blue double-peak gain light conversion master batch, wherein the concentration of PdOEP in polyurethane is 1 multiplied by 10 -5 mol/L。
EXAMPLE 6 preparation of IrCN/DPA light conversion Master batch based on Isofluorone diisocyanate polyurethane
In this embodiment, the iridium pyridine complex used as the sensitizer is IrCN, and the molecular structural formula is:
in this example, the anthracene derivative used as the luminescent agent was DPA, and the molecular structural formula was the same as in example 1.
The preparation of the isophorone diisocyanate based polyurethane in this example was the same as in example 1.
IrCN and DPA are dissolved in N, N' -dimethylacetamide according to the molar ratio of 1: 1, and the solution is added into the prepared polyurethane to be fully stirred and uniformly mixed. Distilling part of the solvent under reduced pressure, pouring into a mold, and curing for 1h under vacuum at 140 ℃. Adding the strip polymer into a granulator to obtain red and blue double-peak gain light conversion master batch, wherein the concentration of IrCN in polyurethane is 8 multiplied by 10 -5 mol/L。
The inventor also takes the red-blue double-peak gain light conversion material composition obtained in the embodiments 1-6 as a light conversion master batch, and adds the light conversion master batch into an agricultural film base material according to the mass ratio of 0.1-11 wt% to prepare the red-blue double-peak gain light conversion agricultural film.
Comparative example 1
This comparative example differs from example 1 in that: no photosensitizer PdTPP was added. Under green excitation, no fluorescence is produced.
Comparative example 2
This comparative example differs from example 1 in that: no luminophore DPA was added. Under green excitation, only red light is emitted.
In addition, the inventors of the present invention have also made experiments with other materials, process operations, and process conditions described in the present specification with reference to the above examples, and have obtained preferable results.
While the invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions and/or additions may be made and substantial equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A red-blue double-peak gain light conversion material composition is characterized by comprising a sensitizing agent, a luminescent agent and a base material, wherein the composition of the sensitizing agent and the luminescent agent as a frequency up-conversion material can emit blue light under the excitation of green light, and the sensitizing agent as a frequency down-conversion material can emit red light under the excitation of green light.
2. The red-blue bimodal gain light conversion material composition according to claim 1, wherein: the sensitizer comprises any one or the combination of more than two of porphyrin metal complex, phthalocyanine metal complex, polypyridine metal complex, organic alkyne metal complex and fluorine boron derivative.
3. The red-blue bimodal gain light conversion material composition according to claim 2, wherein: the porphyrin metal complex comprises at least one of porphyrin palladium complex and porphyrin platinum complex; and/or the polypyridine metal complex comprises at least any one of polypyridine iridium complex, polypyridine ruthenium complex and polypyridine cerium complex; and/or, the organoalkyne metal complex comprises an organoalkyne platinum complex.
4. The red-blue bimodal gain light conversion material composition according to claim 1, wherein: the luminescent agent comprises an aromatic condensed ring compound, and preferably comprises at least any one of pyrene, pyrene derivatives, perylene derivatives, anthracene and anthracene derivatives.
5. The red-blue bimodal gain light conversion material composition according to claim 1, wherein: the mol ratio of the sensitizer to the luminescent agent is 1: 1-1: 360; and/or the matrix material comprises transparent elastic polyurethane.
6. A method of making a red-blue bimodal gain light conversion material composition according to any one of claims 1 to 5, comprising: heating a uniformly mixed system containing a sensitizer, a luminescent agent and a base material to 100-140 ℃ and curing for 1-5 hours to obtain the red-blue double-peak gain light conversion material composition.
7. The method of claim 6, comprising: dissolving a sensitizer and a luminescent agent in an organic solvent according to a molar ratio of 1: 1-1: 360 in a vacuum environment, mixing the mixture with polyurethane for reaction, and then heating to 100-140 ℃ for curing for 1-5 hours to obtain the light conversion material composition with the red and blue double-peak gain;
and/or the concentration of a sensitizer in the uniform mixing system is 1-10 multiplied by 10 -5 mol/L；
And/or the organic solvent comprises N, N 'dimethylacetamide and/or N, N' dimethylformamide.
8. The method of claim 6, comprising: mixing isocyanate and polyether polyol according to a molar ratio of 1.02: 1-4: 1, adding a catalyst, reacting at 70-90 ℃ for 1-4 h to obtain a prepolymer, adding a chain extender, and continuously reacting for 1-5 hours to obtain polyurethane, namely a matrix material;
preferably, the polyether polyol comprises polytetrahydrofuran diol with the number average molecular weight of 1000-3000;
preferably, the isocyanate comprises any one or a combination of more than two of isophorone diisocyanate, methylene diisocyanate and dicyclohexylmethane diisocyanate;
preferably, the catalyst comprises dibutyltin dilaurate, wherein the mass ratio of the catalyst to polyether polyol is 1-4: 100;
preferably, the chain extender comprises 1, 4-butanediol;
preferably, the molar ratio of the chain extender to the isocyanate is 1: 1-1: 3.
9. Use of the red-blue bimodal gain light conversion material composition according to any one of claims 1-5 for preparing a light conversion agricultural film.
10. A light conversion agricultural film comprises a light conversion master batch and an agricultural film base material, wherein the light conversion master batch is prepared from the red-blue double-peak gain light conversion material composition according to any one of claims 1-5, and preferably, the mass content of the light conversion master batch in the agricultural film base material is 0.1-11 wt%.
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