Preparation method and application of NCO functionalized graphene/azo polymer composite waveguide thermo-optical material
A kind of azo polymer and functionalization technology, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of single-layer graphene that are not easy to compound, achieve low driving power, simple preparation method, and improve the effect of thermo-optic performance
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Embodiment 1
[0023] (1) adopt Hummers method to prepare graphite oxide;
[0024] (2) Add 1.15g of TDI and 2.875g of DR-19 successively into a 250mL flask containing 11.5g of 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 of IPDI and 1.26g of 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 ...
Embodiment 2
[0027] (1) adopt Hummers method to prepare graphite oxide;
[0028](2) Add 1.15g of TDI and 4.6g of DR-19 in turn into a 250mL flask containing 23g of 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 peeling for 2h, and then centrifuge to obtain the graphene oxide dispersion. Put the dispersion in a 250mL round-bottomed flask, then add 2.5g of IPDI and 6.8g of 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...
Embodiment 3
[0031] (1) adopt Hummers method to prepare graphite oxide;
[0032] (2) Add 1.15g of TDI and 3.45g of DR-19 successively into a 250mL flask containing 18.4g of 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 250 mL round-bottomed flask, and then 3 g of IPDI and 9.45 g of DMF were sequentially added to the graphene oxide dispersion, and stirred and reacted at 75° C. for 5 h 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 functional...
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