Difunctional light conversion master batches and preparation method thereof

A technology of bifunctional light-converting agent and light-converting masterbatch, which is applied in the fields of botanical equipment and methods, chemical instruments and methods, luminescent materials, etc., can solve the problems of little blue light, difficult light-converting agent, and inability to synchronize the life of the film. , to achieve the effect of good spectral matching, reducing dust pollution and prolonging service life

Active Publication Date: 2013-06-19
FOSHAN ONMILLION NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it can be used to manufacture light-changing masterbatches, and can produce the most important material light-changing agent for the growth of crops. Although some progress has been made, most of them focus on monochromatic light-changing agents, such as red light-changing agents. Lighting agents are mainly light-changing agents of rare earth complexes. There are still many problems in the research of this kind of light-changing agents so far: (1) Short fluorescence lifetime
There are very few literatures that report the fluorescence lifetime of organic complex light conversion agents. Even if it is reported, it only works for 3 months. It is used to produce light conversion masterbatches and prepare light conversion films. Soon its light conversion function will decline very quickly, causing it to be unable to synchronize with the life of the membrane
(2) Single optical function
Among the light conversion agents of rare earth organic complexes, only the UV-red conversion function can be used in the light conversion film at present, and there are few reports that can be converted into the blue light required for plant photosynthesis
In addition, in terms of light energy utilization, it can only absorb ultraviolet light, but not green light, which reduces the utilization efficiency of sunlight.
(3) Expensive
Its high price hinders its application in light conversion film; in addition, there are few reports about blue light conversion agents, and existing literature reports that green light and ultraviolet light in sunlight can be converted into blue light and blue light. Red-orange light, but the problem of incompatibility between the light-changing agent and the polymer creates a problem for the practical application of the light-changing agent

Method used

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  • Difunctional light conversion master batches and preparation method thereof
  • Difunctional light conversion master batches and preparation method thereof
  • Difunctional light conversion master batches and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Synthesis of bifunctional light conversion agent Ca 0.7 Ba 0.3 f 2 :Eu

[0045] Weigh Ca(NO 3 ) 2 4H 2 O(14.8Kg), Ba(NO 3 ) 2 (5Kg), Eu 2 o 3 (17.00g), NH 4 F (11.5Kg), HNO 3 (25ml).

[0046] a. Use HNO first 3 Dissolved Eu 2 o 3 , adding Ca(NO 3 ) 2 4H 2 O and Ba(NO 3 ) 2 Prepare 0.25mol / L solution A;

[0047] Prepare 1mol / L NH 4 F solution B.

[0048] b. Under the condition of stirring, add solution A dropwise to solution B, continue stirring for 1 hour, centrifuge, and dry at 100°C. The SEM morphology of the precursor after drying is shown in the attached figure 1 As shown, its substance is a white lump.

[0049] c. The above-mentioned precipitate after drying, after adding 0.5% of the flux CaF of the weight of the precipitate 2 Grinding, then calcination at 1200° C. for 2 hours under a CO reducing atmosphere, and gradually cooling to obtain a sample. The SEM morphology characteristics of the sample are as attached figure 2 As shown, t...

Embodiment 2

[0053] (1) Synthesis of bifunctional light conversion agent Ca 0.75 Zn 0.15 f 2 :Eu,Ce

[0054] Weigh Ca(NO 3 ) 2 4H 2 O(17.6Kg), Zn(NO 3 ) 2 、Ce 2 o 3 And MgO (total 3.2Kg), Eu 2 o 3 (17.00g), NH 4 F (11.5Kg), HNO 3 (25ml).

[0055] a. Use HNO first 3 Dissolved Eu 2 o 3 、Ce 2 o 3 and MgO, adding Ca(NO 3 ) 2 4H 2 O and Zn(NO 3 ) 2 Prepare 0.25mol / L solution A;

[0056] Prepare 1mol / L NH 4 F solution B.

[0057] b. Under the condition of stirring, add solution A dropwise to solution B, continue stirring for 1 hour, centrifuge, and dry at 100°C.

[0058] c. With the above-mentioned precipitate after drying, add 10% flux CaCl of the weight of the precipitate 2 Grinding, then calcination at 800° C. for 4 hours under a reducing atmosphere of nitrogen-hydrogen mixed gas, and gradually cooling to obtain a sample.

[0059] The excitation spectrum of the product in the ultraviolet region is attached image 3 As shown, the excitation spectrum in the green re...

Embodiment 3

[0063] (1) Synthesis of bifunctional light conversion agent Ca 0.65 Sr 0.30 Fe 0.05 f 2 :Eu

[0064] Weigh Ca(NO 3 ) 2 4H 2 O(24.5Kg), Sr(NO 3 ) 2 (11.2Kg), Fe 2 o 3 and Eu 2 o 3 (total 31.00g), NH 4 F (21.2Kg), HNO 3 (30ml).

[0065] a. Use HNO first 3 Dissolved Eu 2 o 3 , Fe 2 o 3 and Eu 2 o 3 , adding Ca(NO 3 ) 2 4H 2 O, Sr(NO 3 ) 2 (11.2Kg) prepare 0.25mol / L solution A;

[0066] Prepare 1mol / L NH 4 F solution B.

[0067] b. Under the condition of stirring, add solution A dropwise to solution B, continue stirring for 1 hour, centrifuge, and dry at 100°C.

[0068] c. the above-mentioned precipitate after drying, adding flux of 1% of the weight of the precipitate to carry out NaF grinding, then in H 2 with N 2 The mixture was calcined at 950° C. for 3 hours under a reducing atmosphere, and then cooled gradually to obtain a sample.

[0069] (2) Production of light conversion masterbatch

[0070]Weigh 10kg of sample 3 (1), polyvinyl chloride 30k...

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Abstract

The invention discloses difunctional light conversion master batches which comprise difunctional light conversion agents, modifying agents and organic polymer materials. A constituting general formula of the difunctional light conversion master batches is Ca1-xNxF2:Eu, TM, wherein the x is greater than or equal to 0 and is smaller than or equal to 1, the N is one kind or more kinds selected from Ba, Zn, Sr, Mg, Hg and Fe, and the TM is one kind or more kinds selected from Sm, Cu, Pr, Tb, Ce, La, Dy, Mn and Ag. The difunctional light conversion agents are good in stability, high in luminous intensity, adjustable in blue / red orange light intensity, and capable of being used for production of difunctional light conversion master batches and then for production of difunctional light conversion films. The manufactured difunctional light conversion master batches can carry out pre-dispersion for red light conversion agents, dispersity of the red light conversion agents in film base bodies is improved, dust pollution when on-site operation is carried out is reduced, and thus the manufactured light conversion films have a good light conversion effect. The difunctional light conversion films can convert ultraviolet light (300nm-380nm) and green light (520nm-560nm) in sunlight to strong blue light (400nm-500nm) and red orange light (575nm-630nm) which can promote growth of crops simultaneously.

Description

technical field [0001] The invention relates to a dual-function light conversion masterbatch and a preparation method thereof. Background technique [0002] So far, a large number of research experiments have proved that in the spectrum irradiated on the earth's surface, not all light of different wavelengths is beneficial to plant growth, and there are two peak areas that are really beneficial to plant photosynthesis: (1) blue light area (400 ~500nm), of which the strongest absorption peak of chlorophyll α is 425nm, and the strongest absorption peak of chlorophyll β, lutein and α-carotene is 440nm; (2) red orange region (600-680nm), of which 645nm is the strongest of chlorophyll β Absorption peak, 660nm is the strongest absorption peak of chlorophyll α. By increasing the blue light or red light exposure to plants, the root system of the crops can be developed, the stems and leaves are lush, the yield and income are increased, and the quality is superior. [0003] However,...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L27/06C08L23/12C08L77/00C08L25/06C08L67/02C08L61/06C08L61/20C08L67/08C08L63/00C08L33/00C08K3/16C08K3/08C08J3/22C09K11/02C09K11/61C09K11/89A01G9/14
CPCY02A40/25
Inventor 胡广齐刘晓瑭方利浮陈焰郑明东
Owner FOSHAN ONMILLION NANO MATERIALS
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