Modified emulsified asphalt as well as preparation method and application thereof
A technology of emulsified asphalt and modification, applied in building components, building insulation materials, buildings, etc., can solve the problems of poor water damage resistance, no performance, poor repair effect of disease cracks, etc., and achieve no pollution cost and simple process Effect
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[0047] The present invention also provides a method for preparing the modified emulsified asphalt described in the above technical scheme, comprising the following steps:
[0048] a) Graphene and modifying agent are carried out modification reaction in solvent, obtain water-soluble graphene oxide after drying;
[0049] b) mixing the water-soluble graphene oxide obtained in step a) with a modified polyvinyl alcohol solution and an auxiliary agent to obtain a graphene / polyvinyl alcohol colloidal solution;
[0050] c) mixing the graphene / polyvinyl alcohol colloid solution obtained in step c), retarder and emulsified asphalt to obtain modified emulsified asphalt.
[0051] In the invention, firstly, the graphene and the modifying agent are subjected to a modification reaction in a solvent, and the water-soluble graphene oxide is obtained after drying. In the present invention, the graphene and the modifying agent are the same as those described in the above technical solution, and...
Embodiment 1
[0067] (1) 5g graphene and 10g sodium nitrate are joined in the concentrated nitric acid of 68% by 5g graphene and 10g sodium nitrate, then under the condition of stirring in an ice bath, slowly add 30g potassium permanganate, the adding process prevents that temperature exceeds 20 ℃, then Heat the water bath to 35°C, stir for 30min, then slowly add 230mL of distilled water to dilute, raise the temperature to 98°C and continue heating for 2h to obtain graphene to be oxidized; after the temperature stabilizes, add 50mL of 60% hydrogen peroxide and 700mL of distilled water to make The graphene becomes graphene oxide through oxidation reaction; the content is deposited on the bottom, filtered out and washed with distilled water until neutral, and the obtained product is freeze-dried to finally prepare water-soluble graphene oxide.
[0068] (2) Add 100g of sodium borohydride, 200g of high-efficiency silicone defoamer BYK-066N and the water-soluble graphene oxide prepared in step (1...
Embodiment 2
[0071] (1) Add 10g of graphene and 20g of sodium nitrate to 450mL of concentrated nitric acid with a mass concentration of 68%, and then slowly add 50g of silane coupling agent (KH550) under the condition of stirring in an ice bath, and slowly stir until the solution is stable Suspension, then heated to 50°C in a water bath, stirred for 30 minutes, then slowly added 450mL distilled water to dilute, heated to 98°C and continued heating for 2 hours to obtain graphene to be oxidized; after the temperature stabilized, add 100mL water-soluble silicone oil and 700mL distilled water to make the The graphene becomes graphene oxide through oxidation reaction; the content is deposited on the bottom, filtered out and washed with distilled water until neutral, and the obtained product is freeze-dried to finally prepare water-soluble graphene oxide.
[0072] (2) Add 150g of sodium borohydride, 300g of high-efficiency silicone defoamer BYK-066N and the water-soluble graphene oxide prepared i...
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