Modified asphalt particles as well as preparation method and application thereof
A technology for modifying asphalt and granules, which is applied in chemical instruments and methods, drilling compositions, building components, etc., and can solve the problems that cannot meet the requirements of drilling fluid plugging, anti-slumping, and fluid loss reduction. Complex asphalt process and other issues, to achieve the effect of improving high temperature stability and high temperature elasticity, improving strength and improving dispersibility
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Embodiment 1
[0043] Take 20g of dissolved and deasphalted powder with a softening point of 145.2°C into the flask, slowly add 300mL of concentrated nitric acid (65%), keep stirring and gradually increase the temperature, and react under the condition of heating and reflux, the reaction temperature is 85°C, and the reaction time is 5h. After the reaction, cool down to room temperature, dilute with a small amount of distilled water, and suction filter with a microporous membrane. The obtained filtrate is evaporated to dryness by vacuum distillation, and dried to obtain pitch-based graphene oxide microchips.
[0044] Add 10 g of the above-prepared pitch-based graphene oxide microchips into an appropriate amount of xylene, stir and mix evenly, add 12.5 g of dimethylethylenediamine while stirring, and then add 1.0 g of titanate coupling agent. React for 3 hours. After the reaction, cool to room temperature, filter the filtrate, and fully dry the filter cake to obtain the aminated graphene micros...
Embodiment 2
[0048] Take 28g of dissolved and deasphalted powder with a softening point of 154.6°C into the flask, slowly add 350mL of concentrated nitric acid (65%), keep stirring and gradually increase the temperature, and react under the condition of heating and reflux, the reaction temperature is 80°C, and the reaction time is 6h. After the reaction, cool down to room temperature, dilute with a small amount of distilled water, and suction filter with a microporous membrane. The obtained filtrate is evaporated to dryness by vacuum distillation, and dried to obtain pitch-based graphene oxide microchips.
[0049] Add 12 g of the above-prepared pitch-based graphene oxide microflakes to an appropriate amount of xylene, stir and mix evenly, add 14.8 g of diethylethylenediamine while stirring, and then add 1.36 g of titanate coupling agent. React for 4 hours. After the reaction, cool to room temperature, filter the filtrate, and fully dry the filter cake to obtain the aminated graphene microsh...
Embodiment 3
[0053] Take 35g of dissolved and deasphalted powder with a softening point of 162.4°C into the flask, slowly add 650mL of concentrated nitric acid (65%), keep stirring and gradually raise the temperature, and react under the condition of heating and reflux, the reaction temperature is 90°C, and the reaction time is 5.5h . After the reaction, cool down to room temperature, dilute with a small amount of distilled water, and suction filter with a microporous membrane. The obtained filtrate is evaporated to dryness by vacuum distillation, and dried to obtain pitch-based graphene oxide microchips.
[0054] Add 15 g of the above-prepared pitch-based graphene oxide microchips into an appropriate amount of xylene, stir and mix evenly, add 26.5 g of dibutylethylenediamine while stirring, and then add 2.0 g of titanate coupling agent. React for 5 hours. After the reaction, cool to room temperature, filter the filtrate, and fully dry the filter cake to obtain the aminated graphene micros...
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