A kind of preparation method and product of graphene modified pitch
A graphene modification and graphene technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of graphene being unable to disperse evenly, adding graphene, and graphene being unable to modify the effect of asphalt, so as to reduce ultraviolet rays Good effects of aging, high phase change enthalpy, thermal stability and crystallization properties
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Embodiment 1
[0026] (1) Place 10 g of graphene oxide in 200 mL of N,N-dimethylformamide solution for ultrasonic dispersion, heat to 55°C, add 0.05 mol of isophorone diisocyanate under nitrogen atmosphere and react for 12 hours, then add 0.05 mol of isophorone diisocyanate Butanol was continued to react for 8 hours, and 0.05mol hydrazine hydrate was added to continue to react for 6 hours, then filtered, and the resulting product was washed, dried, and pulverized to obtain polyurethane-modified graphene;
[0027] (2) Take polyethylene glycol, tetrabutyl titanate, and polyurethane-modified graphene at a mass ratio of 1:1:3 and place them in an ethanol solution for ultrasonic dispersion, use hydrochloric acid to adjust the pH of the solution to 4, and place them in a water bath at 45°C After hydrolysis for 4 hours under ambient conditions, use sodium hydroxide to adjust the pH value of the solution to 9, let it stand and age for 24 hours, filter and dry to obtain a polyethylene glycol / titanium ...
Embodiment 2
[0030] (1) Place 15 g of graphene oxide in 150 mL of N,N-dimethylformamide solution and disperse uniformly by ultrasonic, then heat to 40°C, add 0.07 mol of isophorone diisocyanate under nitrogen atmosphere and react for 12 hours, then add 0.05 mol of isophorone diisocyanate Butanol continued to react for 8 hours, added 0.7mol hydrazine hydrate to continue to react for 6 hours, and then filtered, and the resulting product was washed, dried, and pulverized to obtain polyurethane-modified graphene;
[0031] (2) Take polyethylene glycol, tetrabutyl titanate, and polyurethane-modified graphene in an ethanol solution at a mass ratio of 1:0.5:5 for ultrasonic dispersion, use hydrochloric acid to adjust the pH of the solution to 5, and place in a 50°C water bath After hydrolysis for 4 hours under ambient conditions, use sodium hydroxide to adjust the pH value of the solution to 10, leave it to age for 48 hours, filter and dry to obtain a polyethylene glycol / titanium dioxide / polyuretha...
Embodiment 3
[0034] (1) Place 20 g of graphene oxide in 200 mL of N,N-dimethylformamide solution and disperse uniformly by ultrasonic, then heat to 50°C, add 0.1 mol of isophorone diisocyanate under nitrogen atmosphere and react for 12 hours, then add 0.05 mol of isophorone diisocyanate Butanol continued to react for 8 hours, added 0.1mol hydrazine hydrate and continued to react for 6 hours, then filtered, and the resulting product was washed, dried, and pulverized to obtain polyurethane-modified graphene;
[0035] (2) Take polyethylene glycol, tetrabutyl titanate, and polyurethane-modified graphene in an ethanol solution at a mass ratio of 2:1:3 for ultrasonic dispersion, and use hydrochloric acid to adjust the pH of the solution to 4, and place them in a 50°C water bath After hydrolysis for 4 hours under ambient conditions, use sodium hydroxide to adjust the pH value of the solution to 9, let it stand and age for 48 hours, filter and dry to obtain polyethylene glycol / titanium dioxide / poly...
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