Polyurethane elastomer composite material, preparation method and application
A technology of polyurethane elastomers and composite materials, applied in the fields of application, bulk chemical production, shoe soles, etc. Folding resistance and other issues, to achieve the effect of avoiding the reduction of folding resistance, high folding resistance, and reducing production costs
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[0027] The embodiment of the present invention provides a kind of preparation method of polyurethane elastomer composite material, comprises the following steps:
[0028] S1, configure 1 ~ 10wt% nano-SiO 2 solution and 0.5-5wt% graphene oxide slurry, the SiO 2 The solution was added to the graphene oxide slurry and dispersed ultrasonically to obtain graphene oxide / SiO 2 solution;
[0029] S2, the graphene oxide / SiO 2 The solution was stirred and evaporated at a temperature of 50-50°C to a batter-like state, and then freeze-dried at -50--10°C for 6-48 hours to obtain graphene oxide@SiO 2 Aerogel;
[0030] S3, the graphene oxide@SiO 2 Add airgel to water-based polyurethane, use a disperser to disperse for 20-40 minutes, then add a curing agent to disperse for 5-15 minutes, place it in a 50-50°C incubator to cure for 1-3 hours, take it out and place it in liquid nitrogen to embrittle 10-20 minutes, put it into a crusher and crush it, preferably into a powder below 100 mesh,...
Embodiment 1
[0043] S01: 10g nano-SiO 2 Dispersed in 2% formic acid solution to prepare 1wt% SiO 2 solution;
[0044] S02: 10g graphene oxide is dissolved in deionized water to prepare 1wt% graphene oxide slurry; SiO 2 The solution was added to 1wt% graphene oxide slurry, ultrasonically mixed and dispersed to obtain graphene oxide / SiO 2 solution;
[0045] S03: Graphene oxide / SiO 2 The solution was stirred at 50 °C to evaporate the aqueous solution to a batter, and the batter-like graphene oxide / SiO 2 The slurry was freeze-dried at -20 °C for 30 h to obtain graphene oxide@SiO 2 airgel.
[0046] S04: 1g graphene oxide@SiO 2 Add the airgel to 20g of water-based polyurethane with a solid content of 50%, use a disperser to disperse for 30 minutes, then add 2g of curing agent hexamethylene diisocyanate (HDI) to disperse for 10 minutes, place it in a 50°C incubator for 3 hours to form, and take it out Embrittle in liquid nitrogen for 20 minutes, put it into a crusher and crush it to 100 m...
Embodiment 2
[0049] S01: 20g nano-SiO 2 Dispersed in acetone solution to prepare 10wt% SiO 2 solution;
[0050] S02:4g graphene oxide is dissolved in deionized water to prepare 2wt% graphene oxide slurry; SiO 2 The solution was added to 2wt% graphene oxide slurry, ultrasonically mixed and dispersed to obtain graphene oxide / SiO 2 solution;
[0051] S03: Graphene oxide / SiO 2 The solution was stirred at 50 °C to evaporate the aqueous solution to a batter, and the batter-like graphene oxide / SiO 2 The slurry was freeze-dried at -20°C for 30 hours to obtain graphene oxide@SiO 2 airgel.
[0052] S04: 10g graphene oxide@SiO 2 Add the airgel to 100g of water-based polyurethane with a solid content of 20%, disperse for 30min with a disperser, then add 10g of curing agent diphenylmethane diisocyanate (MDI) to disperse for 10min, place it in a 50°C incubator for 1h to form, take it out and place Embrittle in liquid nitrogen for 20 minutes, put it into a crusher and crush it to 100 mesh powder,...
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