Preparation method of polypropylene-grafted graphene oxide composite material
A technology of polypropylene grafting and composite materials, which is applied in the field of preparation of polypropylene grafted graphene oxide composite materials by solution blending method, which can solve the problems of reducing the related properties of composite materials and high requirements for reducing agents, and achieve the improvement of tensile strength , Improve the effect of dispersion
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[0016] Example 1:
[0017] 0.1 g of graphene oxide was added to 10 mL of toluene solution, and dispersed under ultrasound for 30 minutes at a power of 300 W. After adding 0.1 mL of APTES solution, the mixture was refluxed and stirred for 8 hours before vacuum filtration was performed. After washing the obtained solid with dichloromethane, it was dried under vacuum at 50°C for 4 hours; the modified graphene peroxide was dissolved in 100 mL xylene solution and ultrasonicated with 300W power for 2 hours, weighed 4.95 g branched polypropylene and added Then, heat to reflux at 120°C. When the added material is completely dissolved, react at a constant temperature for 2 hours; continue to add 4.95g polypropylene and 100mL xylene to continue the reaction until all is dissolved, vacuum extract the mixed solution, and place the obtained material in a vacuum at 40°C After drying for 2 hours under the conditions, the powder of polypropylene grafted graphene oxide can be obtained.
Example Embodiment
[0018] Example 2:
[0019] 0.2 g of graphene oxide was added to 20 mL of toluene solution, and dispersed by ultrasonic for 30 minutes at a power of 300 W. After adding 0.2 mL of APTES solution, the mixture was refluxed and stirred for 8 hours before vacuum filtration. After washing the obtained solid with dichloromethane, it was dried under vacuum at 50℃ for 4 hours; the modified graphene peroxide was dissolved in 100 mL xylene solution, and sonicated with 300W power for 2 hours, weighed 4.9 g branched polypropylene and added Then, heat to reflux at 120°C. When the added material is completely dissolved, react at a constant temperature for 2 hours; continue to add 4.9g polypropylene and 100mL xylene to continue the reaction until all is dissolved, vacuum extract the mixed solution, and place the obtained material in a vacuum 40 After drying at ℃ for 2 hours, the powder of polypropylene grafted graphene oxide can be obtained.
Example Embodiment
[0020] Example 3:
[0021] 0.5 g of graphene oxide was added to 50 mL of toluene solution, and dispersed under ultrasound for 30 minutes under 300 W power. After 0.5 mL of APTES solution was added, the mixture was refluxed and stirred for 8 hours and then vacuum filtered. After washing the obtained solid with dichloromethane, it was dried under vacuum at 50℃ for 4 hours; the modified graphene peroxide was dissolved in 100mL xylene solution, and ultrasonic treatment with 300W power for 2 hours, weighed 4.25g branched polypropylene and added After that, heat to reflux at 120°C. When the added material is completely dissolved, react at a constant temperature for 2 hours; continue to add 4.25g polypropylene and 100mL xylene to continue the reaction until all is dissolved, vacuum extract the mixed solution, and place the obtained material in a vacuum at 40°C After drying for 2 hours under the conditions, the powder of polypropylene grafted graphene oxide can be obtained.
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