CN1269392A - Fluorescent additive - Google Patents
Fluorescent additive Download PDFInfo
- Publication number
- CN1269392A CN1269392A CN 99104574 CN99104574A CN1269392A CN 1269392 A CN1269392 A CN 1269392A CN 99104574 CN99104574 CN 99104574 CN 99104574 A CN99104574 A CN 99104574A CN 1269392 A CN1269392 A CN 1269392A
- Authority
- CN
- China
- Prior art keywords
- film
- light
- additive
- fluorescence
- aromatic carboxylic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Abstract
This invented fluorescent additive is an organic compound containing Eu, La and Gd. The agricultural plastic film in which the said additive is added can absorb UV light with 200-400 nm and can change it into reddish orange light (600-720 nm). It also can be used in photoluminescence material, and its fluorescent intensity is high and its stability is good.
Description
The present invention relates to a kind of fluorescence additive, a kind of photothermal converting agent that UV-light is converted to reddish orange fluorescence of more specifically saying so.UV-light has undesirable action to crop growth, and can cause the aging of plastic agricultural film, and blood orange light can promote photosynthesis to some crop, makes the crop shape growth of growing sturdily, and output improves also and shortens the ripening stage.Present plastics film, be generally the general thin that polyethylene (PE) or polyvinyl chloride (PVC) are produced, it is unfavorable and can cause film aged UV-light to plant growth to absorb, can not be converted into the blood orange light favourable to plant growth, afterwards, people had developed the ageing-resistant film that adds UV light absorber etc., though this film can absorb UV-light, but can not be converted into visible light, make light transmission rate reduce, not make full use of sunlight.Once reported for work among the WO8501945C, some rare earth metal complex is distributed in the polymkeric substance, and made the gardening greenhouse film, and had the light transition function, thereby propose the notion of photothermal converting agent, but it is short and cost is high to add film light steady time of this phototransformation agent.Disclose a kind of two part type photothermal converting agents among the CN1105040A, its chemical general formula is (M
1-xEu
x)
4/nB
nM is the arbitrary proportion combination of Y, La or Gd and two or three compositions in them in the formula, 0＜X＜1, and n=1,2, B is contraposition binary or quaternary aromatic carboxylic acid.There is the problem of synthesis technique poor performance in this photothermal converting agent.
The object of the present invention is to provide that a kind of brightness is higher, cost is lower, the simple two part type fluorescence additives of synthesis technique.
Photothermal converting agent general formula of the present invention is:
(M
xM
yEu
1-x-y)
2C
3
Mx, My are respectively La, Gd in the formula, and x, y are La, Gd proportion, and
0≤x＜1，0≤y＜1，0≤x+y＜1
C: adjacent, a position binary aromatic carboxylic acid, as m-phthalic acid, phthalic acid etc.
Fluorescence additive of the present invention prepares by the following method:
With neighbour, a position binary aromatic carboxylic acid be dissolved in the alkaline aqueous solution solution I, (La
xGd
yEu
1-x-y)
2O
3Be dissolved in HCL or HNO
3In solution II, I is added among the II, stir and also to regulate pH value to 4-7, reaction 10-40min, filtration, drying promptly get this fluorescence additive.
Fluorescence additive of the present invention can be used alone, and also can arbitrary proportion mixes mutually or mixes use with other photothermal converting agent by arbitrary proportion.
Fluorescence additive of the present invention also can be used for embedded photoluminescent material except that being used for agricultural phototransformation film, when being used for the phototransformation film, its addition is 0.05-5.0wt%.
The phototransformation film uv absorption rate in the 200-400nm scope that adds fluorescence additive of the present invention surpasses 90%, sends fluorescent red-orange (580-720nm), and fluorescence intensity is high and stable.Because fluorescence additive of the present invention has utilized the sensibilized between the rare earth element, the choose reasonable part, thereby reduced cost.
Embodiment:
Embodiment 1: get 0.25mol rare earth oxide mixture, Eu in the mixture
2O
3: La
2O
3: Gd
2O
3=0.7: 0.2: 0.1, be dissolved among the 300ml 5MHCL, get solution I; Getting the 0.5mol m-phthalic acid is dissolved in and makes the 5M solution II among the NaOH; II is added I, and stirring reaction under the room temperature is transferred pH value to 7 with NaOH, and reaction 30min filters, oven dry.
Embodiment 2:Eu
2O
3: La
2O
3: Cd
2O
3=0.5: 0.3: 0.2, other condition was with embodiment 1
Embodiment 3:Eu
2O
3: La
2O
3: Cd
2O
3=1: 0: 0, other condition was with embodiment 1
Embodiment 4:Eu
2O
3: La
2O
3: Cd
2O
3=0.7: 0.3: 0, other condition was with embodiment 1
Embodiment 5:Eu
2O
3: La
2O
3: Cd
2O
3=0.6: 0: 0.4, other condition was with embodiment 1
Embodiment 6:
Get new LDPE (film grade) (LDPE) 100kg, add embodiment 1 photothermal converting agent 0.04kg, high-speed stirring is mixed, the canopy film of blowing 80～140 μ m.This film absorption of UV reaches 92%, sends the azarin fluorescent orange under the ultraviolet excitation, and the visible region light transmission rate is 92.9%.
Embodiment 7:
The mulch film of blowing 5～10 μ m, other condition is with embodiment 6, and this film absorption of UV reaches 90%, sends the azarin fluorescent orange under the ultraviolet excitation, and the visible region light transmission rate is 98.4%.Embodiment 8:
PE100kg, photothermal converting agent 0.1kg, all the other conditions are with embodiment 6, and this film absorption of UV reaches 93%, sends the azarin fluorescent orange under the ultraviolet excitation, and the visible region light transmission rate is 92.3%.
Claims (2)
1. fluorescence additive, it is lanthanide element and neighbour, a position binary aromatic carboxylic acid's a title complex, its chemical general formula is:
(M
xM
yE
u1-x-y)
2C
3
Mx, My are respectively La, Gd in the formula, and x, y are La, Gd proportion, and
0≤x＜1，0≤y＜1，0≤x+y＜1
C is adjacent, a position binary aromatic carboxylic acid.
2. fluorescence additive according to claim 1 is characterized in that described neighbour, a position binary aromatic carboxylic acid are preferably m-phthalic acid, phthalic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104574 CN1269392A (en) | 1999-04-02 | 1999-04-02 | Fluorescent additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104574 CN1269392A (en) | 1999-04-02 | 1999-04-02 | Fluorescent additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1269392A true CN1269392A (en) | 2000-10-11 |
Family
ID=5271732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99104574 Pending CN1269392A (en) | 1999-04-02 | 1999-04-02 | Fluorescent additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1269392A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161249A (en) * | 2010-12-27 | 2011-08-24 | 淄博市临淄宽力塑料制品厂 | Light-splitting spectrum greenhouse film and preparation method thereof |
-
1999
- 1999-04-02 CN CN 99104574 patent/CN1269392A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161249A (en) * | 2010-12-27 | 2011-08-24 | 淄博市临淄宽力塑料制品厂 | Light-splitting spectrum greenhouse film and preparation method thereof |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Lanzhou Chemical Industry Co.,China National Petroleum Corp. Document name: Deemed as a notice of withdrawal |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |