A kind of preparation method of waterborne graphene epoxy resin nanocomposite material
A nano-composite material, epoxy resin technology, applied in the field of preparation of water-based graphene/epoxy resin nano-composite materials, can solve the problem of difficult formation of chemical bonds, affecting the stress transmission and dispersion of epoxy resin nano-composites and substrates , poor wettability of graphene and epoxy resin, etc., to achieve excellent interfacial compatibility and binding force, easy to prepare and synthesize in large quantities, and the operation process is simple and controllable
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Embodiment 1
[0018] (1) Dissolve graphite in a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid, add potassium permanganate and react at 40 °C for 10 hours, then add ice water twice the volume of the mixed acid; stir evenly and cool to room temperature, then add graphite mass 3 times hydrogen peroxide solution reduction, after the reaction is completed, after washing and drying, graphene oxide is obtained;
[0019] (2) Take 2.4g of graphene oxide and polyvinylpyrrolidone according to the mass ratio of 5:1, then add 4.5g of aseptic acid, mix well, and obtain functionalized graphene after the reaction is completed;
[0020] (3) Disperse functionalized graphene in water to obtain 10ml of graphene aqueous dispersion with a concentration of 0.008g / ml;
[0021] (4) Add 0.59 g of epoxy resin to the above-mentioned graphene aqueous dispersion, stir at room temperature for 40 minutes, and then distill under reduced pressure under a vacuum of 0.1 MPa to remove water in t...
Embodiment 2
[0024] Example 2 (1) Dissolve graphite in a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid, add potassium permanganate and heat at 40 °C
[0025] React for 10 hours, then add ice water twice the volume of mixed acid. Stir evenly and cool to room temperature, then add a hydrogen peroxide solution 3 times the mass of graphite for reduction, and after the reaction is completed, wash and dry to obtain graphene oxide; (2) Take graphene oxide and polyvinylpyrrolidone according to the mass ratio of 1:3 1g in total, add 1.5g of aseptic acid, mix evenly, and obtain functionalized graphene after the reaction is completed; (3) Disperse the functionalized graphene in water to obtain 50ml of graphene aqueous dispersion with a concentration of 0.006g / ml;
[0026] (4) Add 3.4g of epoxy resin to the above-mentioned graphene aqueous dispersion, stir at room temperature for 50min, and then distill under reduced pressure under a vacuum of 0.1MPa to remove the water...
Embodiment 3
[0030] (1) Dissolve graphite in a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid, add potassium permanganate and react at 40°C for 10 hours, then add ice water twice the volume of the mixed acid. Stir evenly and cool to room temperature, then add a hydrogen peroxide solution 3 times the mass of graphite for reduction, after the reaction is completed, wash and dry to obtain graphene oxide;
[0031] (2) Take 1.2g of graphene oxide and polyvinylpyrrolidone according to the mass ratio of 1:5, add 1.5g of aseptic acid, mix well, and obtain functionalized graphene after the reaction is completed;
[0032] (3) Disperse the functionalized graphene in water to obtain 100ml of graphene aqueous dispersion with a concentration of 0.005g / ml;
[0033] (4) Add 7.4g of epoxy resin to the above-mentioned graphene aqueous dispersion, stir at room temperature for 70min, and then distill under reduced pressure under a vacuum of 0.3MPa to remove the water in the syst...
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