Preparation method for cross-linked three-dimensional carbon nano composite polyurethane material
A technology of carbon nanocomposite and polyurethane materials, which is applied in the field of preparation of cross-linked three-dimensional carbon nanocomposite polyurethane materials, can solve the problems of TPU's low strength, limited application range, poor heat resistance, etc., and achieve expanded application fields and good dispersion effect, mechanical properties and improved thermal stability
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Embodiment 1
[0031] At 25°C, add 0.2g of acidified carbon nanotubes (o-CNTs), 0.1g of carboxylated graphene oxide (GO-COOH) and 400g of distilled water into a 1L reactor. After ultrasonic dispersion for 1.5h, the temperature of the reaction solution was raised to 70°C , put 4g of polyethyleneimine (molecular weight 1800) into the reaction kettle, react for 10h, wash with 800g of distilled water for 5 times, and vacuum dry the product at 60°C for 10h to prepare a composite carbon nanomaterial;
[0032]At 25°C, take 0.125g of the above-prepared composite carbon nanomaterial and 25g of polyether thermoplastic polyurethane (TPU) and stir evenly, first add the twin-screw extruder, the screw speed is 150r / min, and the blending temperature is 210°C. Then, the thermoplastic polyurethane is injected into molding by an injection molding machine, the injection temperature is 210°C, the mold temperature is 35°C, the injection pressure is 45MPa, the holding pressure is 25MPa, and the holding time is 15s...
Embodiment 2
[0035] At 25°C, add 0.1g of acidified carbon nanotubes (o-CNTs), 0.4g of carboxylated graphene oxide (GO-COOH) and 600g of distilled water into a 1L reactor. After ultrasonic dispersion for 1.5h, the temperature of the reaction solution was raised to 70°C , adding 5 g of polyethyleneimine (molecular weight: 8000) into the reactor, reacting for 10 h, washing with 800 g of distilled water for 5 times, and drying the product in vacuum at 60° C. for 10 h to obtain a composite carbon nanomaterial;
[0036] At 25°C, take 0.125g of the above-prepared composite carbon nanomaterial and 25g of polyether thermoplastic polyurethane (TPU) and stir evenly, first add the twin-screw extruder, the screw speed is 150r / min, and the blending temperature is 210°C. Then, the thermoplastic polyurethane is injected into molding by an injection molding machine, the injection temperature is 210°C, the mold temperature is 35°C, the injection pressure is 45MPa, the holding pressure is 25MPa, and the holdi...
Embodiment 3
[0039] At 25°C, add 0.2g of acidified carbon nanotubes (o-CNTs), 0.2g of carboxylated graphene oxide (GO-COOH) and 400g of distilled water into a 1L reactor. After ultrasonic dispersion for 1.5h, the temperature of the reaction solution was raised to 95°C , adding 6g of polyethyleneimine (molecular weight: 8000) into the reactor, reacting for 12h, washing with 800g of distilled water for 5 times, drying the product in vacuum at 60°C for 10h, to obtain a composite carbon nanomaterial;
[0040] At 25°C, take 0.5g of the functionalized graphite oxide / carbon nanotube composite nanocarbon material prepared above and 25g of polyether thermoplastic polyurethane (TPU) and stir evenly, and then add it to a twin-screw extruder at a speed of 150r / min , the blending temperature is 210°C, and then the thermoplastic polyurethane is injected into the injection molding machine. The injection temperature is 210°C, the mold temperature is 35°C, the injection pressure is 45MPa, the holding pressu...
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