A kind of graphene-metal powder composite conductive and thermally conductive plastic and preparation method thereof
A graphene composite and metal powder technology, which is applied in the field of composite materials, can solve the problems of high-end electronic automation equipment that cannot meet the requirements of thermal conductivity and electrical conductivity, insufficient thermal conductivity and electrical conductivity, and reduced mechanical properties. It is suitable for industrial production, excellent thermal conductivity and Good electrical conductivity and low production cost
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Embodiment 1
[0034] The components of the thermally conductive and electrically conductive composite plastics are: 10% of aluminum powder with a diameter of 10 μm, 10% of graphene, 78% of PC / ABS, and 2% of silane coupling agent;
[0035] The specific preparation steps are:
[0036] a. First prepare sheet graphene by mechanical method: disperse expanded graphite (expansion multiple of 500) and appropriate dispersant in water with a concentration of 100 g / L, and then disperse by a high-speed disperser with a stirring speed of 5000 r / min, time 1 h, then the dispersed solution was physically sheared and peeled through a high-pressure homogenizer, the pressure was 0.5 Mpa, and the time was 1 min to prepare a graphene sheet slurry;
[0037] b. The aluminum powder is added to the graphene sheet slurry prepared in step a, and then dispersed by a high-speed disperser, with a stirring speed of 5000 r / min and a time of 10 minutes; then the obtained slurry is subjected to freeze-drying treatment , t...
Embodiment 2
[0041] The components of the thermally conductive and electrically conductive composite plastics are respectively 5% of iron powder with a diameter of 50 μm, 15% of graphene, 78% of PBT, and 2% of silane coupling agent.
[0042] The specific preparation steps are:
[0043] a. First prepare sheet graphene by mechanical method: disperse expanded graphite (expansion multiple of 500) and appropriate dispersant in water with a concentration of 150 g / L, and then disperse by a high-speed disperser with a stirring speed of 5000 r / min, time 2 h, then the dispersed solution was physically sheared and peeled off by a high pressure homogenizer, the pressure was 0.8 Mpa, and the time was 1 min to prepare a graphene sheet slurry;
[0044] b. Add iron powder to the graphene sheet slurry prepared in step a, and then disperse it by a high-speed disperser with a stirring speed of 5000 r / min for 15 min; then freeze-dry the obtained slurry treatment, the drying time was 24 h, and the mixed powd...
Embodiment 3
[0047] The components of the thermally conductive and electrically conductive composite plastics are respectively 10% of nickel powder with a diameter of 25 μm, 10% of graphene, 78% of PA66, and 2% of titanate.
[0048] The specific preparation steps are:
[0049] a. First prepare sheet graphene by mechanical method: disperse expanded graphite (expansion multiple of 200) and appropriate dispersant in water with a concentration of 100 g / L, and then disperse by a high-speed disperser with a stirring speed of 5000 r / min, time 1 h, then the dispersed solution was physically sheared and peeled through a high-pressure homogenizer, the pressure was 0.5 Mpa, and the time was 1 min to prepare a graphene sheet slurry;
[0050] b. The nickel powder is added to the graphene sheet slurry prepared in step a, and then dispersed by a high-speed disperser, the stirring speed is 5000 r / min, and the time is 20 min; then the obtained slurry is dried treatment, the drying temperature was 60 °C, an...
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