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Functional luminescent material and its prepn

A composite material and functional technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency of devices, short service life of devices, etc., and achieve controllable polymerization process, good solubility and film-forming performance, The effect of clear product structure

Active Publication Date: 2009-07-29
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems such as the low luminous efficiency of the device, the short service life of the device, and the stability that needs to be improved urgently.

Method used

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  • Functional luminescent material and its prepn
  • Functional luminescent material and its prepn
  • Functional luminescent material and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of polystyrene containing benzoic acid units at both ends

[0024] (1) Atom Transfer Radical Polymerization of Styrene Initiated by 4-Chloromethylbenzoic Acid

[0025] Initiator 4-chloromethylbenzoic acid, catalyzer (the complex of cuprous chloride and 2,2'-bipyridine), styrene are added in the cyclohexanone solvent, make styrene / initiator / catalyst / partition The molar ratio of the body is 200 / 5 / 5 / 15, the mass ratio of styrene and cyclohexanone is 1:1, the polymerization system is polymerized under the condition of nitrogen protection and oxygen isolation, and the reaction is carried out at 130°C for 2-6 hours. Polymerization products were precipitated in excess methanol, dilute hydrochloric acid was added to remove the catalyst, and the solid product was filtered out and dried. The resulting polymer is polystyrene with terminal benzoic acid units.

[0026] (2) Synthesis of p-isopropylbenzoic acid-terminated polystyrene

[0027] Add 0.3g-0.6g of...

Embodiment 2

[0028] Example 2: Nano TiO 2 Modification of polystyrene with carboxylic acid at both ends

[0029] Dissolve 0.1g-0.5g of polystyrene obtained in Example 1 with carboxylic acid at both ends in chloroform, and drop 30ml of TiO 2 In the colloid, stir at room temperature for 1h-5h, let it stand for stratification, drop methanol into the lower layer (add an appropriate amount of NaCl aqueous solution in advance), and there will be a white precipitate, filter, add deionized water and ultrasonically shake to remove doped nanoparticles, filter and dry to obtain polymerization matter / nano-TiO 2 Composite system.

[0030] Referring to Figure 2, the fluorescence emission spectrum of the film of the polymer and the composite system: the emission peak of the composite system has a red shift of 35nm relative to that of the polymer. In the figure, curve 1 represents the fluorescence emission spectrum of the polymer; curve 2 represents the polymer / nano-TiO 2 Fluorescence emission spectra...

Embodiment 3

[0031] Embodiment 3: Nano-ZnO modification of polystyrene with carboxylic acid at both ends

[0032] Dissolve 0.1g-0.5g of polystyrene with both ends of carboxylic acid obtained in Example 1 in 15ml-30ml of chloroform, add excess nano-ZnO sol, stir and react at room temperature for 1-5h, then let it stand for stratification, and the lower layer Precipitate in methanol (pre-added saturated NaCl solution), filter, dissolve the obtained precipitate in tetrahydrofuran, precipitate in methanol again, add water and ultrasonically oscillate to remove doped nanoparticles, filter and dry to obtain a white powder that is polymerization matter / nano-ZnO composites.

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Abstract

The invention discloses a luminous functional composite material, which is a composite material of polystyrene and inorganic nano-oxides, characterized in that: the polystyrene is polystyrene with carboxylic acid functional groups at both ends, The material is selected from nanometer titanium dioxide, composite oxide of nanometer titanium dioxide, copper and chromium, nanometer zinc oxide or nanometer zinc-aluminum composite oxide. The preparation method is to synthesize polystyrene with benzoic acid unit at one end and chlorine atom at the other end by atom transfer radical polymerization; Polystyrene; final modification with inorganic nano-oxides. The polymer / nanoparticle composite material obtained by the present invention has red shift or blue shift relative to the fluorescence emission spectrum of the polymer, and becomes a new way to adjust the emission spectrum; at the same time, the composite material has good solubility and film-forming properties , has potential application value in light-emitting devices.

Description

technical field [0001] The invention relates to a luminescent functional composite material composed of a polymer and an inorganic nanometer oxide and a preparation method thereof, in particular to a composite material composed of polystyrene containing a specific end group and an inorganic nanometer oxide. Background technique [0002] Since the advent of nanomaterials in the 20th century, people have done a lot of research in this field and achieved many results. In particular, inorganic nano-oxides have many special properties. For example, nano-TiO 2 It is a stable non-toxic ultraviolet light absorber, which can be combined with polymers to improve the aging resistance of polymers; nano-TiO 2 It also has photocatalytic activity, can degrade organic pollutants under light conditions, kill bacteria, and can make functional coatings; TiO 2 Nanoparticle thin films have broad application prospects in solar cells, antireflection coatings, insulating layers, photoelectrodes,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06
Inventor 路建美丁春花徐庆锋王丽华夏雪伟
Owner SUZHOU UNIV
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