Carbon nanotube conductive composite and preparation method thereof
A technology of carbon nanotubes and composites, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problem of difficulty in preparing conductive paste with high carbon nanotube content and poor storage stability Good and other problems, to achieve good storage stability, good performance, good dispersion effect
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[0036] Example 1
[0037] 1) Dissolve 1 part of polyvinylpyrrolidone and 0.5 part of pyrazine in 94.5 parts of N-methylpyrrolidone, then add 4 parts of carbon nanotubes (outer diameter 8nm~12nm, specific surface area 265m 2 / g) Stir to obtain a pre-dispersion;
[0038] 2) Add the pre-dispersed liquid to the sand mill for rough grinding for 1 hour, and the linear speed of rough grinding is 7m / s;
[0039] 3) After rough grinding, fine grinding is performed for 3 hours, the linear speed of fine grinding is 9m / s, and the fineness of slurry composite is ≤10μm and the viscosity is 1698mPa·s.
[0040] Test the performance of the prepared slurry compound:
[0041] 1. Observe the appearance and viscosity changes of the prepared slurry composite within 360 days. The test results are shown in Table 1. figure 1 and figure 2 .
[0042] 2. The volume resistivity of lithium iron phosphate positive pole piece containing 1% carbon nanotubes: At the end of sanding, take the prepared slurry composite and...
Example Embodiment
[0043] Example 2
[0044] 1) Dissolve 0.8 parts of polyvinylpyrrolidone and 0.12 parts of pyrazine in 98.08 parts of N-methylpyrrolidone, then add 1 part of carbon nanotubes (outer diameter 4nm~6nm, specific surface area 496m 2 / g) Stir to obtain a pre-dispersion;
[0045] 2) Add the pre-dispersed liquid to the sand mill for rough grinding for 1 hour, and the rough grinding linear speed is 6m / s;
[0046] 3) After rough grinding, fine grinding is performed for 3h, the linear speed of fine grinding is 9.5m / s, and the fineness of slurry composite is ≤10μm and the viscosity is 4294mPa·s.
[0047] Refer to the method in Example 1 to test the properties of the prepared slurry composite. The test results are shown in Table 1. figure 2 and image 3 .
Example Embodiment
[0048] Example 3
[0049] 1) Dissolve 1 part of polyvinylpyrrolidone in 95.5 parts of N-methylpyrrolidone, then add 3 parts of carbon nanotubes (outer diameter 6nm~10nm, specific surface area 327m 2 / g) Stir to obtain a pre-dispersion;
[0050] 2) Add the pre-dispersed liquid and 0.5 parts of pyrimidine to the sand mill for coarse grinding for 1.5 hours, and the linear speed of coarse grinding is 6m / s;
[0051] 3) After rough grinding, fine grinding is carried out for 3.5h, the linear speed of fine grinding is 9.5m / s, and the fineness of slurry composite is ≤10μm and the viscosity is 2672mPa·s.
[0052] Refer to the method in Example 1 to test the properties of the prepared slurry composite. The test results are shown in Table 1. figure 2 and image 3 .
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