A preparation method for online continuous growth of carbon nanotubes on the surface of carbon fibers
A technology of carbon nanotubes and carbon fibers, which is applied in the field of growing carbon nanotubes on the surface of carbon fibers, can solve the problems of high cost, complex growth process, small scale, etc., and achieve the effect of promoting development and good overall performance
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Embodiment 1
[0054] Step 1: Electrochemically modify the carbon fiber to promote the uniform coating of the catalyst precursor, the electrochemical anodization time is 40s, and the current intensity is 0.2A;
[0055] Step 2: Immerse the carbon fiber in 0.03mol / L catalyst precursor (Co(NO 3 ) 2 ) for 5 minutes;
[0056] Step 3: Pull the carbon fiber obtained in step 2 into the tube furnace, 2 Atmosphere, using H 2 Reducing the catalyst precursor coating to metal nanoparticles, the reduction temperature is 450°C, and the reduction time is 10 minutes;
[0057] Step 4: continue to extend the carbon fiber sample obtained in step 3 into the chemical vapor deposition furnace, and pass H 2 and C 2 h 2 The mixed gas was used to synthesize carbon nanotubes at 650 °C, and finally the samples were collected by an electric winder.
[0058] The samples were tested for fiber tensile strength and interfacial shear strength, and the measured tensile strength of the carbon fiber was 3.80GPa, and the ...
Embodiment 2
[0060] Step 1: Electrochemically modify the carbon fiber to promote the uniform coating of the catalyst precursor, the electrochemical anodization time is 60s, and the current intensity is 0.2A;
[0061] Step 2: Immerse the carbon fiber in 0.03mol / L catalyst precursor (Co(NO 3 ) 2 ) for 10 minutes;
[0062] Step 3: Pull the carbon fiber obtained in step 2 into the tube furnace, 2 Atmosphere, using H 2 Reducing the catalyst precursor coating to metal nanoparticles, the reduction temperature is 450°C, and the reduction time is 10 minutes;
[0063] Step 4: continue to extend the carbon fiber sample obtained in step 3 into the chemical vapor deposition furnace, and pass H 2 and C 2 h 2 The mixed gas was used to synthesize carbon nanotubes at 650 °C, and finally the samples were collected by an electric winder.
[0064] The samples were tested for fiber tensile strength and interfacial shear strength, and the measured tensile strength of the carbon fiber was 3.82GPa, and the...
Embodiment 3
[0066] Step 1: Electrochemically modify the carbon fiber to promote the uniform coating of the catalyst precursor, the electrochemical anodization time is 60s, and the current intensity is 0.2A;
[0067] Step 2: Immerse the carbon fiber in 0.04mol / L catalyst precursor (Co(NO 3 ) 2 ) for 15 minutes;
[0068] Step 3: Pull the carbon fiber obtained in step 2 into the tube furnace, 2 Atmosphere, using H 2 Reducing the catalyst precursor coating to metal nanoparticles, the reduction temperature is 450°C, and the reduction time is 10 minutes;
[0069] Step 4: continue to extend the carbon fiber sample obtained in step 3 into the chemical vapor deposition furnace, and pass H 2 and C 2 h 2 The mixed gas was used to synthesize carbon nanotubes at 650 °C, and finally the samples were collected by an electric winder.
[0070] The samples were tested for fiber tensile strength and interfacial shear strength, and the measured tensile strength of the carbon fiber was 3.88GPa, and the...
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