Light conversion film and preparation method thereof

A technology of thin film and light conversion agent, which is applied in the field of light conversion film and its preparation, and can solve the problems that the service life of plastic films cannot be synchronized, the market is unacceptable, and the price is expensive.

Inactive Publication Date: 2013-06-19
FOSHAN ONMILLION NANO MATERIALS
View PDF1 Cites 11 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Light conversion film and preparation method thereof
  • Light conversion film and preparation method thereof
  • Light conversion film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] (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.

[0075] The general formula of A1 is: CaS:Eu,Cl.

[0076] 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.

[0077] 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

[0089] (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 Li2 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.

[0090] The general formula of B1 is: CaS:Eu, Li.

[0091] 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.

[0092] 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.

[0093] Since carbonate and easily sublimable sulfur powder are used as ra...

Embodiment 3

[0104] (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.

[0105] The general formula of C1 is: CaS:Eu,Cl.

[0106] 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.

[0107] 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.

[0108] Since carbonate and easily sublimable sulfur powder are used as raw materia...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a light conversion film which is characterized by comprising a film base body, a red light conversion agent and a first addition agent, wherein the weight of the red light conversion agent is 0.1-10% of the weight of the film; the weight of the first addition agent is 0.1%-10% of the weight of the film; the balance is the film base body; 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 light conversion agent is mixed into a film especially an agricultural film, the film has light conversion effects, and application of the light conversion agent is convenient. The light conversion film is good in spectral matching with plant photosynthesis. A planting method that the light conversion film is used and meanwhile carbon dioxide is added is used, great effects on plant production and quality increase are achieved, diseases, pests, chemical pesticides do not exist, quality is good, the yield and others are increased, effects are remarkable, high economic value is provided, and a large-scale popularization prospect is achieved.

Description

technical field [0001] The invention relates to a light conversion film 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 converting agents. The research on red light converting agents is mainly based on rare earth organic complexes. Some documents have proposed that red light converting 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 400-480nm and 620-680nm of plants....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/12C08L31/04C08L27/06C08K3/30C08K3/16C08K3/34C08J3/22
Inventor 方利浮郑明东陈焰刘晓瑭胡广齐
Owner FOSHAN ONMILLION NANO MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap