Carbon dot/polyurethane composite material as well as preparation method and application thereof
A composite material, polyurethane technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve separation difficulties, small size of carbon dots, and unreported inventions, etc. problems, to achieve the effect of simple preparation process, easy separation and environmental friendliness
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[0033] Example 1
[0034] (1) Synthesis of yellow light carbon dots by hydrothermal method: Weigh 2.3 g of neutral red on a balance and dissolve it in 60 mL of ethylene glycol, and stir for 30 minutes. Then, it was transferred to a PTFE-lined stainless steel hydrothermal reactor and reacted at 200° C. for 4 hours. After the reaction was completed, it was naturally cooled to room temperature, and the reacted solution and solid were taken out and washed by centrifugation with a mixed solution of n-hexane and acetone (volume ratio of 95:5). After centrifugation, the supernatant was taken into a beaker, and the supernatant was the carbon dot solution used subsequently, and its concentration was 0.1 g / L.
[0035](2) Synthesis of carbon dots / polyurethane composite material: Polyurethane is a commercially available commercial polyurethane foam, which is cut into a cube of 2cm*2cm*2cm (the porosity of the polyurethane foam is 93%). Take 20 mL of the carbon dot solution in step (1), ...
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[0043] Example 2
[0044] (1) Synthesis of yellow light carbon dots by hydrothermal method: Weigh 2.3 g of neutral red on a balance and dissolve it in 60 mL of ethylene glycol, and stir for 30 minutes. Then, it was transferred to a PTFE-lined stainless steel hydrothermal reactor and reacted at 200° C. for 4 hours. After the reaction was completed, it was naturally cooled to room temperature, and the reacted solution and solid were taken out and washed by centrifugation with a mixed solution of n-hexane and acetone (volume ratio of 95:5). After centrifugation, the supernatant was taken into a beaker, and the supernatant was the carbon dot solution used in the following.
[0045] (2) Synthesis of carbon dots / polyurethane composites:
[0046] Take 10g polyethylene glycol and 5g 4,4'-dicyclohexylmethane diisocyanate, stir and mix evenly, and react at a constant temperature of 80 °C to obtain product A; add 10PEG-2000, 0.7g dimethyl silicone oil and 0.7g liquid paraffin, dropwise...
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