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Carbon fiber electrochemical treatment method for surface growth of carbon nanotubes

A carbon nanotube, surface growth technology, applied in fiber treatment, carbon fiber, surface reaction electrolytic coating, etc., can solve the problems of easy agglomeration, great damage to fiber tensile strength, increase, etc., to achieve uniform loading, improve surface Roughness and functional group content, effect of increasing surface polarity

Active Publication Date: 2019-06-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional surface modification technology etches the surface of carbon fiber more severely, and the tensile strength of the fiber is greatly damaged, which is not conducive to the improvement of the interfacial properties of carbon fiber composite materials.
Chinese patent document CN104179790A discloses a method for treating carbon fibers by electrochemical anodic oxidation, and uses ammonium bicarbonate as an electrolyte to perform electrochemical surface treatment on dry-sprayed wet-spun carbon fibers, but the tensile strength of the fibers is greatly damaged
Chinese patent document CN 102505449A discloses a method of grafting CNTs to the surface of carbon fibers by electrochemical treatment, which improves the surface properties of carbon fibers. The amount of grafting is difficult to control

Method used

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  • Carbon fiber electrochemical treatment method for surface growth of carbon nanotubes
  • Carbon fiber electrochemical treatment method for surface growth of carbon nanotubes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Add the carbon fiber from which the surface sizing agent has been removed to the electrolytic cell for electrolysis. The electrolytic cell contains 3% O 3 PNH 4 Organic electrolyte solution, electrolysis time 85s, electrolysis power 50C / g;

[0024] Step 2: Pass the carbon fiber obtained in step 1 through a washing tank to remove the remaining electrolyte on the surface, the washing time is 120s, and the washing temperature is 30°C;

[0025] Step 3: Dry the carbon fiber obtained in step 2 through a drying oven, the drying temperature is 115°C, and the drying time is 130s;

[0026] Step 4: Pass the carbon fiber obtained in step 3 into an impregnation tank, which contains an alcohol solution of cobalt nitrate, and the catalyst solution impregnation time is 150s;

[0027] Step 5: Collect the carbon fiber obtained in Step 4 by using a winding machine.

Embodiment 2

[0029] Step 1: Add the carbon fiber from which the surface sizing agent has been removed to the electrolytic cell for electrolysis. The electrolytic cell contains 3% O 3 P organic electrolyte solution, electrolysis time 85s, electrolysis power 50C / g;

[0030] Step 2: Pass the carbon fiber obtained in step 1 through a washing tank to remove the remaining electrolyte on the surface, the washing time is 120s, and the washing temperature is 30°C;

[0031] Step 3: Dry the carbon fiber obtained in step 2 through a drying oven, the drying temperature is 115°C, and the drying time is 130s;

[0032] Step 4: Pass the carbon fiber obtained in step 3 into an impregnation tank, which contains an alcohol solution of cobalt nitrate, and the catalyst solution impregnation time is 150s;

[0033] Step 5: Collect the carbon fiber obtained in Step 4 by using a winding machine.

Embodiment 3

[0035] Step 1: Add the carbon fiber from which the surface sizing agent has been removed to an electrolytic cell for electrolysis. The electrolytic cell contains a TEA organic electrolyte solution with a mass fraction of 3%. The electrolysis time is 85s and the electrolysis power is 50C / g;

[0036] Step 2: Pass the carbon fiber obtained in step 1 through a washing tank to remove the remaining electrolyte on the surface, the washing time is 120s, and the washing temperature is 30°C;

[0037] Step 3: Dry the carbon fiber obtained in step 2 through a drying oven, the drying temperature is 115°C, and the drying time is 130s;

[0038] Step 4: Pass the carbon fiber obtained in step 3 into an impregnation tank, which contains an alcohol solution of cobalt nitrate, and the catalyst solution impregnation time is 150s;

[0039] Step 5: Collect the carbon fiber obtained in Step 4 by using a winding machine.

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Abstract

The invention discloses a carbon fiber electrochemical processing method for a surface growth carbon nanotube, and belongs to the field of carbon fiber surface processing. The method includes the following steps of firstly, adding carbon fibers without surface paste agent into an electrolytic bath to be electrolyzed; secondly, removing surface residual electrolyte of the carbon fibers obtained in the first step through a rinsing bath; thirdly, drying the carbon fibers obtained in the second step through a drying box; fourthly, introducing the carbon fibers obtained in the third step into a dipping tank, wherein a catalyst precursor solution is contained in the dipping tank; fifthly, collecting the carbon fibers obtained in the fourth step through a fiber collecting machine. The tensile strength of the carbon fibers is not damaged, the surface roughness and functional group content of the carbon fibers can be effectively improved, the surface polarity of the carbon fibers is improved, and the catalyst precursor solution is evenly loaded on the surfaces of the carbon fibers.

Description

Technical field [0001] The invention relates to the field of surface treatment of carbon fibers, in particular to an electrochemical treatment method of carbon fibers for surface growth of carbon nanotubes. Background technique [0002] In-situ growth of carbon nanotubes on the surface of carbon fiber (hereinafter referred to as CNTs) is a new type of technology. The introduction of CNTs increases the contact area between the resin and the fiber, improves the wettability of the fiber and the resin, and provides a certain amount of mechanical engagement center It plays an important role in improving the interface strength of composite materials. [0003] ETTh Stenson et al. (Carbon nanotube / carbon fiber hybrid multiscale composites[J].Journal of Applied physics,2002,91(9):6034-6037) pre-deposited a metal catalyst on the surface of carbon fiber, and then used chemical vapor deposition. Even carbon nanotubes are grown in situ on the surface of the carbon fiber, so that the carbon fib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74C25D11/00D06M101/40
CPCC25D11/00D06M11/74D06M2101/40
Inventor 王成国王延相陈纪强郑林宝王兴辉秦建杰
Owner SHANDONG UNIV