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Method of using graphene composite material covalently modified by polymer with aggregation-induced emission characteristic to prepare solid film optical limiter

A technology of aggregation-induced luminescence and covalent modification, which is applied in the direction of luminescent materials, chemical instruments and methods, instruments, etc., can solve the problems that limit the practical application of graphene materials, RGO sheets are prone to stacking clusters, poor solubility and Machinability and other issues

Active Publication Date: 2019-11-15
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite its excellent properties and (application) prospects, due to the presence of van der Waals forces and strong π-π stacking interactions, RGO sheets are prone to stacking and cluster formation
This leads to its poor solubility and processability, which greatly limits the practical application of graphene materials.

Method used

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  • Method of using graphene composite material covalently modified by polymer with aggregation-induced emission characteristic to prepare solid film optical limiter
  • Method of using graphene composite material covalently modified by polymer with aggregation-induced emission characteristic to prepare solid film optical limiter
  • Method of using graphene composite material covalently modified by polymer with aggregation-induced emission characteristic to prepare solid film optical limiter

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Experimental program
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Effect test

Embodiment 1

[0061] Embodiment 1: A specific synthesis method of a polymer with aggregation-induced luminescence properties and a polymer covalently modified graphene material with aggregation-induced luminescence properties:

[0062] 1) Synthesis of compound 1: To a 500 mL round bottom flask were added tetrabutylammonium bromide (900 mg, 2.79 mmol) and aqueous sodium hydroxide solution (250 mL, 50% wt). After the mixture was heated to 75°C, 1,6-dibromohexane (67.8 g, 277.9 mmol) and 2,7-dibromofluorene (9.72 g, 30 mmol) were added to the mixture, respectively. After stirring at 75°C for 2 hours, the mixture was cooled to room temperature and extracted with dichloromethane, and the organic layers were combined. Wash three times with deionized water and hydrochloric acid solution (0.1M). It was then dried over anhydrous MgSO4. After filtration and solvent evaporation, excess 1,6-dibromohexane was distilled off under reduced pressure using a vacuum pump. The crude product was then filtere...

Embodiment 2

[0068] Embodiment 2: A specific synthesis method for preparing a solid-state thin-film optical limiter by using a polymer covalently modified graphene composite material with aggregation-induced luminescence properties:

[0069] Steps 1)-6) are the same as above;

[0070] 7) Take 10g of PMMA powder, add 100ml of NMP into a narrow-necked bottle, and make the PMMA powder completely dissolved by ultrasound. During the ultrasound process, use a glass rod to stir once every half an hour to prevent PMMA from settling and forming a jelly, until the PMMA solution is clear and transparent. Denote the PMMA solution as solution A. like Image 6 shown.

[0071] 8) Dissolve 10 mg of composite PFTPE-RGO into 10 ml of NMP, and the solution of the sample is recorded as solution B. Add 5ml of solution A to the vial below, and add 1ml of solution B to the vial. Sonicate the vial for about half an hour to mix the solution well and remove air bubbles from the solution. The sonicated homogene...

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Abstract

The invention belongs to the technical field of using an organic light-emitting material, covalently modified graphene, and a composite material thereof to prepare a solid film optical limiter, specifically provides a method of using a using graphene composite material covalently modified by a polymer with an aggregation-induced emission characteristic to prepare a solid film optical limiter, andat the same time, provides a polymer with an aggregation-induced emission characteristic, graphene covalently modified by the polymer, and a preparation method of the polymer. The polymer is preparedby Suzuki coupling polymerization reactions, contains tetraphenyl ethylene and a fluorene functional group, and has an aggregation-induced emission characteristic. Through nitrene reactions, the polymer is covalently grafted to the surface of graphene, and the obtained graphene composite material is used to prepare a solid film optical limiter. The obtained graphene composite material has excellent dissolvability, outstanding optical properties, and a good charge transfer performance. The prepared solid film optical limiter has excellent optical response and thus has a wide application range in photo-electronic devices.

Description

technical field [0001] The invention belongs to the technical field of organic light-emitting materials, covalently modified graphene and composite materials thereof for preparing solid-state thin-film optical limiters, and specifically provides a polymer with aggregation-induced luminescence properties, covalently modified graphene and a preparation method thereof At the same time, a solid-state thin-film optical limiter based on a polymer covalently modified graphene composite material with aggregation-induced luminescence properties and a preparation method thereof are provided. Background technique [0002] Macromolecules with aggregation-induced emission (AIE) properties are a class of organic light-emitting materials. Compared with traditional organic light-emitting materials, AIE, as a new design concept and theory of optical materials, not only has the advantages of structural determination and easy purification of traditional organic light-emitting materials. and ot...

Claims

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Application Information

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IPC IPC(8): C08G61/10C08G83/00C09K11/06C08L33/12C08L87/00C08J5/18G02F1/361
CPCC08G61/10C08G83/001C08G2261/124C08G2261/143C08G2261/312C08G2261/3142C08G2261/411C08G2261/52C08J5/18C08J2333/12C08J2487/00C09K11/06C09K2211/1416C09K2211/1425G02F1/3615
Inventor 张斌陈柯宇陈泳楠范越丹邢可迪刘志伟王可心陈彧
Owner EAST CHINA UNIV OF SCI & TECH
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