Preparing method of magnetic functionalization graphene composite
A composite material and magnetic function technology, applied in the direction of magnetic materials, diamagnetic/paramagnetic materials, magnetic objects, etc., can solve the problems of unfavorable composite surface properties, uneven dispersion of graphene, unstable composite materials, etc. Low resistance, wide application range, easy coating effect
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Embodiment 1
[0025] A preparation method of magnetic functionalized graphene composite material, comprising the following steps:
[0026] 1) At room temperature, the graphene microflakes and magnetic nanoparticles are mixed evenly by airflow dispersion, the dispersion time is 4 hours, and the mass ratio of magnetic nanoparticles to graphene microflakes is 1:1.2; the specific operation of airflow dispersion is : Put the graphene microchips and magnetic nanoparticles into the airtight container, and blow compressed air into the airtight container, so that the materials in the airtight container are in a fluidized state and fully mixed into a uniform material.
[0027] 2) At 65°C, the mixture obtained in step 1) was dispersed in an ethanol solvent by ultrasonic dispersion, and the dispersion time was 4 hours at 200w to prepare a solution with a solid content of 60%;
[0028] 3) Add silane coupling agent, auxiliary agent and maleic anhydride grafted polypropylene to the mixture of step 2) and ...
Embodiment 2
[0033] A preparation method of magnetic functionalized graphene composite material, comprising the following steps:
[0034] 1) At room temperature, the graphene microflakes and magnetic nanoparticles are mixed evenly by airflow dispersion, the dispersion time is 4 hours, and the mass ratio of magnetic nanoparticles to graphene microflakes is 1:1.2; the specific operation of airflow dispersion is : Put the graphene microchips and magnetic nanoparticles into the airtight container, and blow compressed air into the airtight container, so that the materials in the airtight container are in a fluidized state and fully mixed into a uniform material.
[0035]2) At 65°C, the mixture obtained in step 1) was dispersed in an ethanol solvent by ultrasonic dispersion, and the dispersion time was 4 hours at 250w to prepare a solution with a solid content of 70%;
[0036] 3) Add silane coupling agent, auxiliary agent and maleic anhydride grafted polypropylene to the mixture of step 2) and m...
Embodiment 3
[0041] A preparation method of magnetic functionalized graphene composite material, comprising the following steps:
[0042] 1) At room temperature, the graphene microflakes and magnetic nanoparticles are mixed evenly by airflow dispersion, the dispersion time is 4 hours, and the mass ratio of magnetic nanoparticles to graphene microflakes is 1:1.2; the specific operation of airflow dispersion is : Put the graphene microchips and magnetic nanoparticles into the airtight container, and blow compressed air into the airtight container, so that the materials in the airtight container are in a fluidized state and fully mixed into a uniform material.
[0043] 2) At 65°C, the mixture obtained in step 1) was dispersed in an ethanol solvent by ultrasonic dispersion, and the dispersion time was 4 hours at 210w to prepare a solution with a solid content of 65%;
[0044] 3) Add silane coupling agent, auxiliary agent and maleic anhydride grafted polypropylene to the mixture of step 2) and ...
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