Polymethyl methacrylate and modified graphene composite material, and preparation method thereof
A technology of polymethyl methacrylate and composite materials, which is applied in the field of polymethyl methacrylate and modified graphene composite materials and their preparation, can solve the problems of poor compatibility and increase the difficulty of application in the polymer field, and achieve low cost effect
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Embodiment 1
[0041] See figure 1 , a preparation method of polymethyl methacrylate and modified graphene composite material, comprising the steps of:
[0042] (1) Mix flake graphite powder with an organic solvent, add gallic acid, and then ball mill to obtain a graphene slurry, and then vacuum-dry the graphene slurry to obtain a graphene powder;
[0043] (2) Add the graphene powder into the mixed solution of deionized water / absolute ethanol, drop the coupling agent and mix evenly, and modify it to obtain the modified graphene powder;
[0044] (3) Add modified graphene powder to deionized water, add surfactant, calcium chloride, sodium carbonate and methyl methacrylate, pre-mix to form oily droplets suspended in deionized water;
[0045] (4) The initiator was added dropwise for suspension polymerization, and the reaction solution was filtered to obtain black polymer particles, namely polymethyl methacrylate and modified graphene composite material.
[0046] In the step (1), the particle s...
Embodiment 2
[0056] The difference between this embodiment and listing embodiment 1 is:
[0057] In the step (1), the particle size of the flake graphite powder is 8000 mesh; the organic solvent is NMP; the mass ratio of the flake graphite powder to gallic acid is 100:1.
[0058] In the step (1), the vacuum drying temperature is 90°C, and the planetary ball mill is used for ball milling for 48 hours; the operating parameters of the planetary ball mill are 30 minutes of forward and reverse operation alternately, with an interval of 10 minutes, and a total running time of 32 hours. Rotate 300r / min, flip 3r / min, the grinding ball is 2mm stainless steel ball.
[0059] In the step (2), the coupling agent is KH570.
[0060] In the step (2), the modification condition is: react at 67° C. for 6 hours, filter the reaction liquid with suction, and dry it in a vacuum drying oven at 90° C.
[0061] In the step (3), the surfactant is a mixture of 1% PVA solution and 1% CMC solution with a mass ratio ...
Embodiment 3
[0066] The difference between this embodiment and listing embodiment 1 is:
[0067] In the step (1), the particle size of the flake graphite powder is 4000 mesh; the organic solvent is NMP; the mass ratio of the flake graphite powder to gallic acid is 80:1.
[0068] In the step (1), the vacuum drying temperature is 80°C, and the planetary ball mill is used for ball milling for 36 hours; the operating parameters of the planetary ball mill are 25 minutes of forward and reverse rotation alternately, with an interval of 8 minutes, and a total running time of 28 hours. Rotate 250r / min, flip 2r / min, the grinding ball is 1mm stainless steel ball.
[0069] In the step (2), the coupling agent is titanate 105 or titanate 201.
[0070] In the step (2), the modification condition is: react at 70° C. for 6 hours, filter the reaction liquid with suction, and dry it in a vacuum drying oven at 80° C.
[0071] In the step (3), the surfactant is a mixture of 0.5% PVA solution and 0.5% CMC sol...
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