A kind of polyetheretherketone-based electromagnetic shielding material based on modified multi-walled carbon nanotubes and preparation method thereof
A technology of multi-walled carbon nanotubes and electromagnetic shielding materials, applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problem that PEEK is difficult to organic solvents, etc.
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Embodiment 1
[0029] Dissolve 0.133g of PEI particles with chloroform in the test tube, pour the solution into a 500mL beaker after completely dissolving, rinse the test tube several times with chloroform, and pour the rinsed solution into the beaker. Then pour 100mL of chloroform into the beaker and stir evenly, and add 8g of MWCNTs under continuous stirring, and finally add 200mL of chloroform. After 8 hours of ultrasonic treatment, suction filtration, ethanol washing, and drying at 100°C for 24 hours, PEI-coated carbon nanotubes were obtained, and the mass ratio of PEI to carbon nanotubes was 1:60. Then PEI-coated carbon nanotubes were mixed with PEEK (MFI=25g / 10min) at a mass ratio of 7:93, stirred in a high-speed mixer at a speed of 26000r / min for 1min, and then taken out. After the above mixture was dried, it was melt-blended with a micro mixer (MINILAB) at a temperature of 380° C. and a screw speed of 60 r / min. After extrusion, it was granulated to obtain a polyetheretherketone-based...
Embodiment 2
[0032] Dissolve 0.080g of PEI particles with chloroform in a test tube, pour the solution into a 500mL beaker after complete dissolution, and rinse with chloroform several times. Pour 100mL of chloroform and stir evenly, and add 8g of MWCNTs under continuous stirring, and finally add 200mL of chloroform. After ultrasonic treatment for 8 hours, suction filtration, ethanol washing, and drying at 100°C for 24 hours, PEI-coated carbon nanotubes were obtained, and the mass ratio of PEI to carbon nanotubes was 1:100. Then, the mass ratio of the coated carbon nanotubes to the PEEK powder (MFI=25g / 10min) was 7:93 in a high-speed mixer at a speed of 26000r / min for 1min and then taken out. After the above mixture was dried, it was melt-blended using a micro-mixer at a blending temperature of 380° C. and a screw speed of 60 r / min to obtain a composite material. The tensile strength of the composite material is 110 MPa, the elongation at break is 40%, and the electrical conductivity is 0...
Embodiment 3
[0034] Dissolve 0.057g of PEI particles with chloroform in a test tube, pour the solution into a 500mL beaker after complete dissolution, and rinse with chloroform several times. Pour 100mL of chloroform and stir evenly, and add 8g of MWCNTs under continuous stirring, and finally add 200mL of chloroform. After ultrasonic treatment for 8 hours, suction filtration, ethanol washing, and drying at 100° C. for 24 hours, PEI-coated carbon nanotubes were obtained, and the mass ratio of PEI to carbon nanotubes was 1:140. Then, the mass ratio of the coated carbon nanotubes to the PEEK powder (MFI=25g / 10min) was 7:93 in a high-speed mixer at a speed of 26000r / min for 1min and then taken out. After the above mixture was dried, it was melt-blended using a micro-mixer at a blending temperature of 380° C. and a screw speed of 60 r / min to obtain a composite material. The tensile strength of the composite material is 110MPa, the elongation at break is 37%, and the electrical conductivity is ...
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