A kind of carbon dot/polyurethane composite material and its preparation method and application
A composite material and polyurethane technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve separation difficulties, small carbon dot size, and unreported inventions, etc. problem, to achieve the effect of simple preparation process, easy separation and environmental friendliness
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Embodiment 1
[0034] (1) Synthesize yellow light carbon dots by hydrothermal method: weigh 2.3g of neutral red with a balance and dissolve in 60mL of ethylene glycol, and stir for 30 minutes. Then it was transferred to a polytetrafluoroethylene-lined stainless steel hydrothermal reactor and reacted at 200°C for 4 hours. After the reaction was finished, it was naturally cooled to room temperature, and the reacted solution and solid were taken out, and centrifuged and washed with a mixed solution of n-hexane and acetone (volume ratio: 95:5). After centrifugation, take the supernatant in a beaker, which is the carbon dot solution used later, and its concentration is 0.1g / L.
[0035](2) Synthesis of carbon dots / polyurethane composite material: Polyurethane is a commercially available polyurethane foam, which is cut into cubes of 2cm*2cm*2cm (the porosity of the polyurethane foam is 93%). Get 20mL of the carbon dot solution in step (1), immerse the polyurethane foam block (0.2g) in the carbon d...
Embodiment 2
[0044] (1) Synthesize yellow light carbon dots by hydrothermal method: weigh 2.3g of neutral red with a balance and dissolve in 60mL of ethylene glycol, and stir for 30 minutes. Then it was transferred to a polytetrafluoroethylene-lined stainless steel hydrothermal reactor and reacted at 200°C for 4 hours. After the reaction was finished, it was naturally cooled to room temperature, and the reacted solution and solid were taken out, and centrifuged and washed with a mixed solution of n-hexane and acetone (volume ratio: 95:5). After centrifugation, take the supernatant in a beaker, and this supernatant is the carbon dot solution used later.
[0045] (2) Synthesis of carbon dots / polyurethane composites:
[0046] Take 10g of polyethylene glycol and 5g of 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 of simethicone and 0.7g of liquid paraffin, drop 3 Drop dibutyltin dilaurate, con...
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