High heat-conducting wave-absorbing heat-dissipation composite material
A composite material, high thermal conductivity technology, applied in the field of polymer materials, can solve problems such as delays, interfere with the normal operation of electronic medical instruments, etc., and achieve the effects of improving wave absorption performance, improving heat transfer and heat dissipation performance, and high absorption frequency band
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Embodiment 1
[0014] Example 1 The following formula (proportioned by weight): 10 parts of organic resin, 15 parts of thermal conductive agent, 70 parts of magnetic powder, 3 parts of ethanol with a mass fraction of 65%, 1 part of water, and 1 part of dispersant is used first by spraying Mix the coupling agent and heat conduction agent at 75°C, then add organic resin, half of the heat conduction agent, half of water, ethanol, and dispersant processing aid to the high-speed dispersion mixer in sequence, and heat while stirring to 80-100°C, then add the remaining heat-conducting agent and magnetic powder into the internal mixer, control the temperature of the internal mixer at 180-200°C, and mix for 15 minutes to prepare a high thermal conductivity wave-absorbing and heat-dissipating composite material.
Embodiment 2
[0015] Example 2 The following formula (proportioned by weight): 11 parts of organic resin, 13 parts of thermal conductive agent, 70 parts of magnetic powder, 4 parts of ethanol with a mass fraction of 65%, 1 part of water, and 1 part of dispersant is used first by spraying Mix the coupling agent and heat conduction agent at 75°C, then add organic resin, half of the heat conduction agent, half of water, ethanol, and dispersant processing aid to the high-speed dispersion mixer in sequence, and heat while stirring to 80-100°C, then add the remaining heat-conducting agent and magnetic powder into the internal mixer, control the temperature of the internal mixer at 180-200°C, and mix for 15 minutes to prepare a high thermal conductivity wave-absorbing and heat-dissipating composite material.
Embodiment 3
[0016] Example 3 The following formula (proportion by weight): 13 parts of organic resin, 10 parts of heat conducting agent, 70 parts of magnetic powder, 5 parts of ethanol with a mass fraction of 65%, 1 part of water, and 1 part of dispersant; Mix the coupling agent and heat conduction agent at 75°C, then add organic resin, half of the heat conduction agent, half of water, ethanol, and dispersant processing aid to the high-speed dispersion mixer in sequence, and heat while stirring to 80-100°C, then add the remaining heat-conducting agent and magnetic powder into the internal mixer, control the temperature of the internal mixer at 180-200°C, and mix for 15 minutes to prepare a high thermal conductivity wave-absorbing and heat-dissipating composite material.
[0017] At the same ambient temperature, the thermal conductivity (test standard: ASTM D5470) of the three composite materials prepared in Examples 1 to 3 were 1.6239W / m.k, 1.4002W / m.k, and 1.3895W / m.k; their relative magn...
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