Heat-conducting electromagnetic-shielding high-strength PEEK composite material and preparation method thereof
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A technology of electromagnetic shielding and composite materials, applied in the field of thermal conductivity, high-strength PEEK composite materials and their preparation, and electromagnetic shielding, which can solve the problems of poor electromagnetic shielding and poor thermal conductivity.
Pending Publication Date: 2020-06-16
CHANGZHOU HUA JUN SPECIAL ENG PLASTICS PROD
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[0005] In order to solve the technical problems of poor thermal conductivity and poor electromagnetic shielding performance of PEEK materials, a thermal conductivity, electromagnetic shielding, high-strength PEEK composite material and its preparation method are provided
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Embodiment 1
[0021] A thermally conductive, electromagnetic shielding, high-strength PEEK composite material, comprising the following components in parts by weight: 75.5 parts of PEEK, 3 parts of beryllium bronze powder, 3 parts of ferrite powder, 3.5 parts of semiconductor nano powder, and 15 parts of PEI-based long carbon fiber;
[0022] Wherein, the beryllium bronze powder contains 2wt% beryllium, 0.3wt% nickel, 0.3wt% cobalt, and the rest is bronze; the average particle size of the semiconductor nanopowder is 200-300nm, and the semiconductor nanopowder is tin antimony oxide ; The PEI-based long carbon fiber is a carbon fiber filament with 1wt% PEI as an adhesive.
[0023] The preparation method of above-mentioned a kind of heat conduction, electromagnetic shielding, high-strength PEEK composite material, comprises the steps:
[0024] (1) beryllium bronze powder, ferrite powder, semiconductor nano-powder are mixed into mixed powder according to the above ratio, coupling agent is added ...
Embodiment 2
[0028] The preparation method of this example is the same as that of Example 1, except that the components by weight are 72 parts of PEEK, 4 parts of beryllium bronze powder, 4 parts of ferrite powder, 4 parts of semiconductor nano powder, and 16 parts of PEI-based long carbon fiber.
Embodiment 3
[0030] The preparation method of this example is the same as that of Example 1, except that the components by weight are 75 parts of PEEK, 4 parts of beryllium bronze powder, 4 parts of ferrite powder, 2 parts of semiconductor nano powder, and 14 parts of PEI-based long carbon fiber.
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Abstract
The invention relates to a heat-conducting electromagnetic-shielding high-strength PEEK composite material which comprises the following components in parts by weight: 50-90 parts of PEEK, 0.5-10 parts of beryllium bronze powder, 2-10 parts of ferrite powder, 0.5-5 parts of semiconductor nano powder and 10-50 parts of PEI-based long carbon fiber. A preparation method comprises the following steps:(1) proportionally mixing the beryllium bronze powder, the ferrite powder and the semiconductor nano powder into mixed powder, adding a coupling agent into the mixed powder, and continuing to uniformly mix to form modified mixed powder for later use; and (2) adding PEEK into a main feeding port of a double-screw extruder, adding the modified mixed powder obtained in the step (1) into a side feeding port, adding the PEI-based long carbon fibers into an exhaust port, and performing extrusion granulation to obtain the heat-conducting electromagnetic-shielding high-strength PEEK composite material. The PEEK composite material disclosed by the invention has relatively good heat conduction and electromagnetic shielding properties and relatively high mechanical strength.
Description
technical field [0001] The invention relates to the technical field of polymer processing, in particular to a thermally conductive, electromagnetic shielding, high-strength PEEK composite material and a preparation method thereof. Background technique [0002] Polyetheretherketone (PEEK) is the most representative variety among polyaryletherketone polymers, and it is a thermoplastic resin with the best comprehensive properties. It has outstanding mechanical properties, and performs very well in high temperature resistance, corrosion resistance, flame retardancy, radiation resistance, electrical insulation, etc. Although PEEK resin has excellent high temperature resistance, its glass transition temperature (143°C) is relatively low, and the heat distortion temperature of pure resin is only 160°C, which limits its wide application. , PTFE, various whiskers or inorganic compounds can enhance the mechanical properties of PEEK materials to improve the performance of PEEK materia...
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