Hyperbranched polymer and preparation method and LED application thereof

A technology for hyperbranched polymers, polycondensation reactions, used in chemical instruments and methods, sustainable buildings, electrical components, etc.

Active Publication Date: 2020-12-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the application of hyperbranched po

Method used

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  • Hyperbranched polymer and preparation method and LED application thereof
  • Hyperbranched polymer and preparation method and LED application thereof
  • Hyperbranched polymer and preparation method and LED application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Embodiment 1: Preparation of hyperbranched polymer phosphor 1

[0078] This embodiment provides a method for preparing polymers through Barbier polycondensation reaction using 4,4'-dichlorobenzophenone as a reactive monomer, including the following steps:

[0079] Take a 100mL double-necked flask, coat the mouth with vacuum grease, plug it with a rubber stopper, and wrap it tightly with insulating tape to ensure good airtightness. Add magnesium chips (0.48g, 0.02mol) into the double-necked flask from the straight mouth, add magnets, and connect the condenser tube and straight air extraction joint in turn (all joints need to be coated with vacuum grease and clamped with plastic clips). Repeat the process of vacuuming, hot air gun blowing, cooling, and nitrogen flow three times. After passing the nitrogen gas for the last time, close the straight-shaped air extraction joint, connect a balloon filled with nitrogen gas, and then open the plug of the straight-shaped air ext...

Embodiment 2

[0083] Embodiment 2: Preparation of hyperbranched polymer phosphor 2

[0084] This embodiment provides a method for preparing polymers through Barbier polycondensation reaction using 4,4'-dichlorobenzophenone as a reactive monomer, including the following steps:

[0085] Take a 100mL double-necked flask, coat the mouth with vacuum grease, plug it with a rubber stopper, and wrap it tightly with insulating tape to ensure good airtightness. Add magnesium chips (0.48g, 0.02mol) into the double-necked flask from the straight mouth, add magnets, and connect the condenser tube and straight air extraction joint in turn (all joints need to be coated with vacuum grease and clamped with plastic clips). Repeat the process of vacuuming, hot air gun blowing, cooling, and nitrogen flow three times. After passing the nitrogen gas for the last time, close the straight-shaped air extraction joint, connect a balloon filled with nitrogen gas, and then open the plug of the straight-shaped air ext...

Embodiment 3

[0089] Example 3: Hyperbranched polymer phosphor powder 1 converts blue light wafer to prepare white light LED

[0090] Mix the hyperbranched polymer phosphor powder 1 prepared in Example 1 with the epoxy resin binder at a mass ratio of 3:1, 4:1, and 5:1, and apply it to a blue chip with an optimal emission wavelength of 460nm , to obtain white light LED 1 .

[0091] The performance test result of gained white light LED 1 sees image 3 , where CIE coordinates and color rendering index and color temperature include: (0.3413,0.2874)(80.2,4872), (0.3574,0.3073)(76.7,4181), (0.3751,0.3333)(77.4,3774).

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Abstract

The invention discloses a hyperbranched polymer and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The hyperbranched polymer comprises a structural unit with a structural formula shown as a formula (I). The preparation method comprises the following steps: carrying out Barbier polycondensation reaction on a mixture containing a reactionmonomer, metal and an initiator at the temperature of 10-100 DEG C in an inert atmosphere, and hydrolyzing. The hyperbranched polymer has the aggregation-induced emission property, and the preparationmethod of the hyperbranched polymer is simple in process, mild in condition, high in operability, low in cost, non-toxic and harmless. The hyperbranched polymer has emission in a yellow fluorescent region, and a white light LED is obtained by converting a blue light wafer.

Description

technical field [0001] The application relates to a hyperbranched polymer and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] LED is called the fourth-generation lighting source or green light source. It has the characteristics of energy saving, environmental protection, long life, and small size. It can be widely used in various indications, displays, decorations, backlights, general lighting and urban landscape lighting. At present, the most common way to realize white light LED is phosphor powder conversion white light LED, that is, by applying a layer of yellow phosphor powder on the blue light chip, the blue light and yellow light are mixed into white light. However, the self-quenching (aggregation-causedquenching, ACQ) phenomenon of traditional fluorophores greatly limits their application in solid-state tunable emitter-converted LEDs. [0003] The aggregation-induced emission (AIE) phenomeno...

Claims

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Application Information

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IPC IPC(8): C08G61/02C09K11/06H01L33/50
CPCC08G61/02C09K11/06H01L33/502C08G2261/11C08G2261/1422C08G2261/312C08G2261/522C08G2261/72C08G2261/95C08G2261/332C08G2261/132Y02B20/00
Inventor 万文明荆亚楠朱能波苏敏鲍红丽
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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