Light conversion master batch and preparation method thereof

A technology for light-converting masterbatches and masterbatches, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as inability to synchronize the service life of plastic films, hinder the application of light-converting agents, and unreported fluorescence life, and improve light attenuation. properties, protection against oxidation and deliquescence, ease of application

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, there are still many problems in the light conversion agents that can be used to prepare light conversion masterbatches and light conversion films on the market: (1) Poor matching
(2) The cost of preparation is high, so it is expensive and difficult to accept in the market, which is currently the biggest obstacle hindering the application of light-changing agents
(3) poor stability
(4) short fluorescence lifetime
Most of the patents and related documents do not report the fluorescence lifetime, and the fluorescence half-life of some reports is only about half a year. Since the renewal time of agricultural film is 9 to 12 months, it cannot be synchronized with the service life of plastic film.

Method used

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  • Light conversion master batch and preparation method thereof
  • Light conversion master batch and preparation method thereof
  • Light conversion master batch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Synthesis of red light conversion agent: weigh 64.5g CaCO according to the stoichiometric ratio 3 , 24.8g sulfur powder, 0.52g Eu 2 o 3 , 4.6gNH 4 Cl, then the raw materials were mixed, fully ground, calcined at 800°C for 2 hours under a CO reducing atmosphere, and gradually cooled to obtain the sample (A1), which was red in color.

[0065] The general formula of A1 is: CaS:Eu,Cl.

[0066] Excitation spectrum see figure 1 . figure 1 It shows that the light conversion agent (A1) can effectively absorb ultraviolet light and yellow-green light that plants do not absorb or absorb weakly in photosynthesis, and avoid the absorption spectrum of photosynthesis. characteristic wavelength of red light.

[0067] For the emission spectrum see figure 2 . figure 2 It shows that the light conversion agent (A1) can absorb ultraviolet light and yellow-green light and emit red light needed for plant photosynthesis, and its spectrum is very consistent with the photosynthesis...

Embodiment 2

[0079] (1) Synthesis of red light conversion agent: weigh 64.5g CaCO according to the stoichiometric ratio 3 , 24.8 sulfur powder, 0.52g Eu 2 o 3 , 4.6g Li 2 CO 3 , mix the raw materials, grind them thoroughly, bake at 850°C for 2 hours in a CO reducing atmosphere, and gradually cool down to obtain the sample (B1), which is orange-red.

[0080] The general formula of B1 is: CaS:Eu, Li.

[0081] Experiments have shown that the excitation spectrum of B1 is the same as that of A1, and it can also absorb ultraviolet light and yellow-green light that are not needed for photosynthetic growth of plants or that absorb weaker light.

[0082] For the emission spectrum see image 3 . image 3 It shows that the light conversion agent (B1) can absorb ultraviolet light and yellow-green light and emit red light needed for plant photosynthesis, and its spectrum is very consistent with the photosynthesis spectrum.

[0083] Since carbonate and easily sublimable sulfur powder are used as ...

Embodiment 3

[0094] (1) Synthesis of red light conversion agent: weigh 64.5g CaCO according to the stoichiometric ratio 3 , 24.8 sulfur powder, 0.52g Eu 2 o 3 , 4.6g CaCl 2 , mix the raw materials, grind them thoroughly, bake at 900°C for 2 hours under a CO reducing atmosphere, and gradually cool down to obtain a sample (C1), which is red in color.

[0095] The general formula of C1 is: CaS:Eu,Cl.

[0096] Experiments show that: the excitation spectrum of C1 is the same as that of A1, and it can also absorb ultraviolet light and yellow-green light that are not needed for photosynthetic growth of plants or absorb weaker ones.

[0097] For the emission spectrum see Figure 4 . Figure 4 It shows that the light conversion agent (C1) can absorb ultraviolet light and yellow-green light and emit red light needed for plant photosynthesis, and its spectrum is very consistent with the photosynthesis spectrum.

[0098] Since carbonate and easily sublimable sulfur powder are used as raw materia...

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Abstract

The invention discloses a light conversion master batch which is characterized by comprising a red light conversion agent and an organic matter carrier, wherein the weight of the red light conversion agent is 0.1-80% of the weight of the master batch; and a composition general formula of the red light conversion agent is Cal-xMxS:TM, wherein the x is less than 1 and is larger than or equal to 0, the M is one kind or more kinds of Mg, Ba, Sr, Zn, Cd, and Hg, and the TM is one kind or more kinds of Sm, Ce, Y, Gd, La, Pr, Eu, Cu, and Mn. The red light conversion agent can not only convert sunlight into waves with the wavelength of 380-480nm and with the wavelength of 640-680nm, needed by plant photosynthesis, but also absorb ultraviolet light of 220-380nm and green yellow light of 480-620nm which are harmful to plants. The red light conversion agent is manufactured into the master batch at first and then is used for manufacturing a film, pre-dispersion can be carried out on the red light conversion agent, and dispersity of the red light conversion agent in a film base body is improved. Dust pollution in field operation is reduced. The fact that the red light conversion agent is firstly manufactured into the master batch and then manufactured into the film has the advantages of being good in dispersion, simple in field operation, and high in stability.

Description

technical field [0001] The invention relates to a light conversion masterbatch and a preparation method thereof. Background technique [0002] The light-changing agent is to convert the ultraviolet, purple and green light in sunlight that are useless to plant photosynthesis into red and blue light that can promote plant growth. There are few research reports on blue light-changing agents. The research on red light-changing agents is mainly based on rare earth organic complexes. Some documents have proposed that red light-changing agents can promote the growth of plants. [0003] However, there are still many problems in the light conversion agents currently on the market that can be used to prepare light conversion masterbatches and light conversion films: (1) Poor matching. Especially for organic complex light conversion agents, the main emission peak is generally around 610nm, which is quite different from the absorption spectrum range of plants at 620~680nm. (2) The hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L31/04C08K13/06C08K9/10C08K3/30C09K11/56C08L23/08C08L27/06
Inventor 方利浮郑明东陈焰刘晓瑭胡广齐
Owner FOSHAN ONMILLION NANO MATERIALS
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