Use of carboxyl-terminated hyperbranched polyester as luminescent material

A technology of hyperbranched polyester and terminal hydroxyl hyperbranching, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high price and high production cost of phosphor powder, and achieve the effect of avoiding easy reunion and solving the problem of high production finished products

Active Publication Date: 2017-10-27
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the blue phosphor, which is one of the three primary color phosphors in the prior art, mainly uses divalent europium ions or trivalent cerium ions as the activator, both europium and cerium are rare earth metals, and the price is relatively expensive, resulting in phosphor High production cost

Method used

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  • Use of carboxyl-terminated hyperbranched polyester as luminescent material
  • Use of carboxyl-terminated hyperbranched polyester as luminescent material
  • Use of carboxyl-terminated hyperbranched polyester as luminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 0.25g of carboxyl-terminated hyperbranched polyester I and dissolve it in 1ml of N,N-dimethylformamide, add it to 4g of EP-3401A, stir and mix evenly, desolventize at a vacuum of 0.1MPa at 120°C for 120min, add 4g EP-3401BRM, stir and mix evenly, evenly coat on the mold, defoam at 0.05MPa at 60°C for 60min, then transfer the mold to an ordinary oven, cure at 120°C for 90min, demould, and get blue fluorescent composite Membrane I. The structural formula of above-mentioned carboxyl-terminated hyperbranched polyester I is as follows:

[0033]

[0034] attached figure 1 It is the N of carboxyl-terminated hyperbranched polyester I, the fluorescence emission spectrogram of N-dimethylformamide solution sample under the excitation of 355nm, it can be seen that the carboxyl-terminated hyperbranched polyester I has a stronger intensity in the range of 400-450nm fluorescence emission. According to attached figure 1 The color coordinates of the N,N-dimethylformamide so...

Embodiment 2

[0040] Weigh 0.50g carboxyl-terminated hyperbranched polyester II, dissolve it in 1.5ml dimethyl sulfoxide, add it to 4g EP-3401A, stir and mix evenly, desolventize at 0.1MPa 130℃ for 120min, add 4gEP-3401BRM , stirred and mixed evenly, evenly coated on the mold, defoamed at a vacuum of 0.05MPa at 60°C for 80 minutes, then transferred the mold to an ordinary oven, cured at 120°C for 100 minutes, and demolded to obtain the blue fluorescent composite film II. The structural formula of the above-mentioned carboxyl-terminated hyperbranched polyester II is as follows:

[0041]

Embodiment 3

[0043] Weigh 0.25g carboxyl-terminated hyperbranched polyester III, dissolve it in 1ml N,N-dimethylacetamide, add it to 4g EP-3401A, stir and mix evenly, desolventize at 0.1MPa 120℃ for 120min, add 4g EP-3401BRM, stir and mix evenly, evenly coat on the mold, defoam at 0.05MPa at 60°C for 60min, then transfer the mold to an ordinary oven, cure at 110°C for 110min, demould, and get blue fluorescence Composite Membranes III. The structural formula of the above-mentioned carboxyl-terminated hyperbranched polyester III is as follows:

[0044]

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PUM

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Abstract

The invention discloses a use of carboxyl-terminated hyperbranched polyester as a luminescent material. According to an experiment, the carboxyl-terminated hyperbranched polyester can emit blue luminescence with relatively strong intensity under near ultraviolet light excitation, and compared with conventional inorganic fluorescent powder, the carboxyl-terminated hyperbranched polyester can disperse into LED packaging resin better, so that the problem of easy agglomeration of fluorescent powder caused by poor compatibility between inorganic fluorescent powder and organic packaging resin is avoided. In addition, because expensive rare earth elements are not needed, the problem that production costs of inorganic blue fluorescent powder are relatively high is solved.

Description

technical field [0001] The invention relates to a hyperbranched polyester compound, in particular to the use of a carboxyl-terminated hyperbranched polyester as a luminescent material. Background technique [0002] White LEDs have the advantages of energy saving, environmental protection, and high efficiency, and have important applications in the fields of lighting and display. Light-converting white LEDs are the most widely used white LEDs. There are two main types of light-converting white LEDs: ① blue LED chips combined with yellow phosphors; ② near-ultraviolet chips combined with red, green and blue primary color mixed phosphors. The luminous color of the first type of white LED device is greatly affected by the thickness of the phosphor coating and the driving current of the chip, the luminous stability is poor, the color is not easy to restore, and the lack of red light components leads to a low color rendering index. The luminous color of the second type of white L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08G63/91C08L63/00C08L67/00
CPCC08G63/914C08L63/00C08L2203/206C09K11/06C09K2211/1425C09K2211/1433C08L67/00
Inventor 刘丹李城剑吴美霞杜乐美吴明港洪欣悦林明敏
Owner JIAXING UNIV
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