Wear-resistant hard composite material using graphene as filler and preparation method thereof
A technology of composite materials and composite material plates, applied in the field of wear-resistant hard polymer composite materials and their preparation, to achieve excellent mechanical properties, prevent passivation cracks, and high specific surface area
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[0028] The method for preparing the wear-resistant hard graphene / polymer-based composite material of the present invention is characterized by the following processes:
[0029] (1) Preparation of powder with homogeneously mixed graphene and polymer matrix resin particles
[0030] Firstly, an appropriate amount of rare earth stabilizer and acrylate are mixed with polymer matrix resin particles, and then graphene is slowly added in batches under stirring, and high-speed stirring is carried out for 5-10 minutes to obtain a uniformly mixed powder of graphene and polymer matrix. Among them, the role of acrylate is to accelerate the plasticization process of PVC, improve the rheology of PVC fluid and improve the appearance quality of PVC products.
[0031] (2) Add the above powder to the torque rheometer and mix for 3-10 minutes at a temperature of 150-280°C and a rotation speed of 50-100 rpm to obtain a molten composite as a wear-resistant hard composite material Precursor;
[0032] (3) T...
Example Embodiment
[0035] Example 1
[0036] Weigh 69g of polyvinyl chloride (PVC, average particle size is about 140μm), 1.03g of acrylate (ACR), 4.83g of stearate rare earth stabilizer (powder particle size is about 280μm), mix the three and use high speed Stir evenly with a mixer (rotational speed 5000rpm), then weigh 0.15g of graphene powder into the above-mentioned mixed powder, and then stir evenly with a high-speed mixer (rotational speed 5000rpm), and finally obtain a uniformly mixed powder of graphene and polymer matrix. The above-mentioned mixed powder is added to a torque rheometer, the temperature is raised to 165°C, and the mixture is mixed for 5 minutes at a rotation speed of 60 rpm to obtain a massive composite material. The above materials were hot-pressed on a flat vulcanizer preheated to 185°C, and kept under pressure of 15MPa for 10 minutes to prepare a hard graphene / PVC composite sheet, the thickness of the composite sheet is 1.0mm .
[0037] Samples were taken from the plate an...
Example Embodiment
[0038] Example 2
[0039] Weigh 69g PVC (particle size is about 140μm), 1.03g ACR, 4.83g fatty acid rare earth stabilizer (powder particle size is 350μm), mix the three and use a high-speed mixer (speed 6000rpm) to stir evenly, then weigh 0.828 g of graphene powder is added to the mixed powder and stirred evenly with a high-speed mixer (rotating speed 6000 rpm) to obtain a powder in which the graphene and the polymer matrix are uniformly mixed. Add the uniformly mixed mixed powder to the torque rheometer, raise the temperature to 165°C, mix for 5 minutes at a speed of 60 rpm, stop the mixing, remove the massive composite material from the torque rheometer Remove and cool to room temperature. Then, the block composite material is hot-pressed on a flat plate vulcanizer preheated to 185°C, and the pressure is maintained at 15MPa for 10 minutes, and then cooled to room temperature to obtain a hard graphene / PVC composite sheet. The thickness of the high-quality graphene / polymer matr...
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