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Carbon nanotube-carbon fiber multi-scale reinforcement as well as preparation method and application thereof

A technology of carbon nanotubes and carbon fibers, which is applied in the field of preparation of carbon nanotubes-carbon fiber multi-scale reinforcements, can solve problems such as uneven distribution, irregular structure, and many impurities, and achieve improved bonding effect, strong practicability, and high technology simple effect

Active Publication Date: 2020-11-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors have found that the carbon nanotubes obtained by these single metal catalysts have their own advantages and disadvantages. The carbon nanotubes produced by Fe have a relatively regular structure, but the output is small and unevenly distributed; the carbon nanotubes produced by Co are moderate in output, but The structural regularity is poor; the output of carbon nanotubes produced by Ni is the largest, but the structure is very irregular, and there are many impurities such as amorphous carbon.

Method used

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  • Carbon nanotube-carbon fiber multi-scale reinforcement as well as preparation method and application thereof
  • Carbon nanotube-carbon fiber multi-scale reinforcement as well as preparation method and application thereof
  • Carbon nanotube-carbon fiber multi-scale reinforcement as well as preparation method and application thereof

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preparation example Construction

[0038] As introduced in the background technology, in view of the problems of uneven distribution of carbon nanotube network, irregular structure, and formation of amorphous carbon impurities in the process of catalyzing the growth of carbon nanotubes on the surface of continuous carbon fibers with various commonly used catalysts in the prior art, this paper One embodiment of the invention proposes a method for preparing a carbon nanotube-carbon fiber multiscale reinforcement, comprising the following steps:

[0039] soaking the surface-activated carbon fiber tow in the catalyst precursor solution, and drying to obtain the carbon fiber tow with the catalyst precursor attached to the surface;

[0040] Reducing catalyst precursors to nano-metal particles, namely catalysts;

[0041] Using the CCVD process, the metal particles catalyze the decomposition of acetylene in the tube furnace and form a carbon nanotube network structure on the surface of the carbon fiber to obtain a carb...

Embodiment 1

[0077] Step 1: The purchased Toray T700 carbon fiber tow is drawn into the tube furnace by a motor, and under the protection of nitrogen, it passes through the furnace chamber with a temperature controlled at 700°C at a wire speed of 15cm / min to remove the surface of the fiber The sizing agent is then collected by a wire collecting machine;

[0078] Step 2: Put the desizing carbon fiber obtained in step 1 into the ammonium dihydrogen phosphate solution with a concentration of 5wt%, and perform electrochemical oxidation with graphite as the cathode and carbon fiber as the anode. The oxidation time is 80s and the current intensity is 0.4A. The oxidized fiber bundles are oven-dried at 70°C;

[0079] Step 3: Weigh an appropriate amount of copper nitrate and ferric nitrate hydrated crystals, and prepare a solution with absolute ethanol as a solvent. The concentration of Cu ions in the solution is 0.0375 mol / L, and the concentration of Fe ions is 0.0125 mol / L. Then put the carbon f...

Embodiment 2

[0086] Step 1: The purchased Toray T700 carbon fiber tow is drawn into the tube furnace by a motor, and under the protection of nitrogen, it passes through the furnace chamber with a temperature controlled at 700°C at a wire speed of 15cm / min to remove the surface of the fiber The sizing agent is then collected by a wire collecting machine;

[0087] Step 2: Put the desizing carbon fiber obtained in step 1 into the ammonium dihydrogen phosphate solution with a concentration of 5wt%, and perform electrochemical oxidation with graphite as the cathode and carbon fiber as the anode. The oxidation time is 80s and the current intensity is 0.4A. The oxidized fiber bundles are oven-dried at 70°C;

[0088] Step 3: Weigh an appropriate amount of copper nitrate and ferric nitrate hydrated crystals, and prepare a solution with absolute ethanol as a solvent. The concentration of Cu ions in the solution is 0.025 mol / L, and the concentration of Fe ions is 0.025 mol / L. Then put the carbon fib...

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Abstract

The invention discloses a process scheme for growing a carbon nanotube on the surface of a continuous carbon fiber tow through a catalytic chemical vapor deposition method by using a multi-element catalytic system containing a copper component. An implementation method disclosed by the invention comprises the following steps of preparing a catalyst precursor solution taking absolute ethyl alcoholas a solvent by taking copper nitrate and ferric nitrate as necessary options and cobalt nitrate and nickel nitrate as optional options, then feeding surface-activated carbon fibers into the solution,performing dipping for 10-15 minutes, and then performing drying in a drying oven; and feeding the carbon fiber tow with the surface loaded with a catalyst precursor into a tubular furnace, and respectively carrying out reduction of a catalyst and CCVD growth of the carbon nanotube to obtain carbon nanotube-carbon fiber multi-scale reinforcement. According to the method, the carbon nanotube-carbon fiber multi-scale reinforcement with more uniform carbon nanotube distribution and more regular carbon atom arrangement can be obtained, and the interface bonding capability of a carbon fiber composite material can be significantly improved.

Description

technical field [0001] The invention relates to the technical field of carbon fiber surface modification, in particular to a method for preparing a carbon nanotube-carbon fiber multi-scale reinforcement. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Carbon fiber-reinforced resin-based composites (CFRPs) are currently widely concerned high-performance materials, and their demand is increasing in the fields of aerospace, sporting goods, vehicles and ships, and industrial medical equipment. At present, the mechanical properties of carbon fiber composites are still far behind their potential, mainly due to the weak interfacial bonding between carbon fibers and resin matrix....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06M11/74C08J5/06C08K9/02C08K7/06C25D11/02C23C14/18D06M101/40
CPCC08J5/06C08K7/06C08K9/02C23C14/18C25D11/02D06M11/74D06M11/83D06M2101/40
Inventor 王延相崔博文王成国姚志强岳阳王永博王玉霞徐小丹
Owner SHANDONG UNIV
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