A kind of preparation method and application of NCO functionalized graphene/azo polymer composite waveguide thermo-optic material

An azo polymer, functionalized technology, applied in optics, nonlinear optics, instruments, etc., can solve the problem that single-layer graphene is not easy to recombine, and achieve the effects of low driving power, fast response speed, and simple preparation method.

Inactive Publication Date: 2017-10-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strong π-π force and huge van der Waals force in the graphene structure make it hydrophobic and easy to agglomerate, and single-layer graphene is not easy to combine with other materials.

Method used

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  • A kind of preparation method and application of NCO functionalized graphene/azo polymer composite waveguide thermo-optic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) adopt Hummers method to prepare graphite oxide;

[0024] (2) Add 1.15g TDI and 2.875g DR-19 successively into a 250mL flask containing 11.5g DMF, stir and reflux for 20min. Next, after raising the temperature to 50°C, add 0.5g T-12, and react for 2 hours to obtain a hydroxyl-terminated prepolymer;

[0025] (3) Put 0.0126g of graphite oxide in 6.3g of DMF for ultrasonic peeling for 1h, and then centrifuge to obtain the graphene oxide dispersion. Put the dispersion in a 250mL round-bottomed flask, then add 1.26g IPDI and 1.26g DMF to the graphene oxide dispersion in sequence, and stir and react at 45°C for 2h to obtain IPDIGO. Then, the IPDIGO dispersion was added to the prepared prepolymer, and the stirring reaction was continued for 3h. Finally, the product was filtered through a filter membrane, placed in a vacuum drying oven, and dried to constant weight at 70°C to obtain a reddish-brown NCO-functionalized graphene / azo polymer composite waveguide thermo-optic ma...

Embodiment 2

[0027](1) adopt Hummers method to prepare graphite oxide;

[0028] (2) Add 1.15g TDI and 4.6g DR-19 successively into a 250mL flask containing 23g DMF, stir and reflux for 20min. Next, after raising the temperature to 60°C, add 0.5g T-12, and react for 3 hours to obtain a hydroxyl-terminated prepolymer;

[0029] (3) Put 0.0126g of graphite oxide in 7.5g of DMF for ultrasonic exfoliation for 2h, and then centrifuge to obtain the graphene oxide dispersion. Put the dispersion in a 250mL round bottom flask, then add 2.5g IPDI and 6.8g DMF to the graphene oxide dispersion in sequence, and stir and react at 50°C for 3h to obtain IPDIGO. Then, the IPDIGO dispersion was added to the prepared prepolymer, and the stirring reaction was continued for 4h. Finally, the product was filtered through a filter membrane, placed in a vacuum drying oven, and dried to constant weight at 70°C to obtain a reddish-brown NCO-functionalized graphene / azo polymer composite waveguide thermo-optic materia...

Embodiment 3

[0031] (1) adopt Hummers method to prepare graphite oxide;

[0032] (2) Add 1.15g TDI and 3.45g DR-19 successively into a 250mL flask containing 18.4g DMF, stir and reflux for 20min. Next, after raising the temperature to 80°C, add 0.5g T-12, and react for 4 hours to obtain a hydroxyl-terminated prepolymer;

[0033] (3) Put 0.0126g of graphite oxide in 9.45g of DMF for ultrasonic exfoliation for 6h, and then centrifuge to obtain the graphene oxide dispersion. The dispersion was placed in a 250mL round-bottomed flask, and then 3g of IPDI and 9.45g of DMF were sequentially added to the graphene oxide dispersion, and stirred and reacted at 75°C for 5h to obtain the isocyanide IPDIGO. Then, the IPDIGO dispersion was added to the prepared prepolymer, and the stirring reaction was continued for 6h. Finally, the product was filtered through a filter membrane, placed in a vacuum drying oven, and dried to constant weight at 70°C to obtain a reddish-brown NCO functionalized graphene / a...

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Abstract

The invention belongs to the field of organic / inorganic composite material synthesis and relates to preparation of azo polymer and functionalized graphene oxide series compounds, in particular to a preparation method and application of an NCO functionalized graphene / azo polymer composite waveguide thermo-optical material. The preparation method comprises the steps of firstly, preparing graphite oxide through a Hummers method, and obtaining graphite oxide dispersion liquid through ultrasonic peeling; then, making toluene diisocynate react with disperse red-19 containing two hydroxyl groups under the action of T-12, and obtaining azobenzene prepolymer with the end capped through hydroxy; subsequently, making IPDI react with the graphite oxide dispersion liquid, and preparing and obtaining isophorone diisocyanate functionalized graphite oxide; then, adding the graphite oxide to the obtained azobenzene prepolymer with the end capped through hydroxy for coducting a reaction, and finally obtaining the azo polyurethane / isophorone diisocyanate functionalized graphite oxide nanometer composite material. The material has a high thermo-optical coefficient (dn / dT) and can be applied to research of a novel digital thermo-optical switch which is low in driving power and high in response speed.

Description

technical field [0001] The invention belongs to the field of synthesis of organic / inorganic composite materials, and relates to the preparation of azo polymers and functionalized graphene oxide series compounds, in particular to a preparation method of an NCO functionalized graphene / azo polymer composite waveguide thermo-optic material and applications. Background technique [0002] Azobenzene and its derivatives are an important class of compounds with photoresponsive properties. At present, aromatic azo compounds with reusable functionality are mainly aromatic azo compounds, and these compounds will undergo reversible cis-trans isomerization reactions under the action of light, resulting in photochromism, photoanisotropy and photophase Variation effect, with its excellent performance, has been developed rapidly in the field of optoelectronic information functional materials. Compared with inorganic materials, organic polymer nonlinear optical materials have the advantage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/76C08G18/32C08G18/10C08K9/04C08K3/04G02F1/01
CPCC08G18/3836C08G18/724C08G18/755C08G18/76C08K3/04C08K9/04G02F1/0147
Inventor 邱凤仙陈彩红笪祖林杨冬亚曹天林
Owner JIANGSU UNIV
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