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Multi-nano carbon filament composite carbon fiber and preparation method thereof

A technology of composite carbon fiber and nano-carbon, which is applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of good synthesis process and lack of reproducibility, and achieve the effect of simple and easy preparation process and large pitch.

Active Publication Date: 2018-03-06
泉州工艺美术职业学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The regular spiral microcarbon fiber with a certain pitch and high rigidity has better micromechanical properties than the spiral or twisted rope nano / micro carbon fiber, but there is still a lack of reproducible synthesis process.

Method used

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  • Multi-nano carbon filament composite carbon fiber and preparation method thereof
  • Multi-nano carbon filament composite carbon fiber and preparation method thereof
  • Multi-nano carbon filament composite carbon fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Synthesis Example 1: The supported catalyst is pressed at 30 mg / cm 2 The amount of acetylene is tiled on the surface of the substrate placed in the reactor. The reactor is kept at a constant temperature of 700-750°C under a nitrogen atmosphere. The flow rate of acetylene introduced is 1 sccm per square centimeter of the substrate area. 1.5:1, the ratio of the amount of nitrogen and hydrogen introduced is 0.5:1, and at the same time, hydrogen is used to carry the sulfur-containing substance thiophene into the reaction system, and the sulfur content in the gas is controlled to account for 0.5%, so that hydrocarbons are catalytically cracked under hydrogen atmosphere The carbon-forming particles are deposited on the crystal surface of the composite catalyst, and react for two hours to obtain a spiral-shaped carbon fiber composed of multiple nano-carbon filaments. Its microscopic shape is as follows: figure 1 with figure 2 As shown, the measured rigidity rate is 10.7Gpa. ...

Embodiment 2

[0050] Synthetic embodiment two: the supported catalyst is pressed 50mg / cm 2 The amount of acetylene is tiled on the surface of the substrate placed in the reactor. The reactor is kept at a constant temperature of 760-790°C under a nitrogen atmosphere. The flow rate of acetylene introduced is 5 sccm per square centimeter of substrate area. 2:1, the ratio of the amount of nitrogen and hydrogen introduced is 3:1, and at the same time, the hydrogen gas is used to carry the sulfur-containing substance thiophene into the reaction system, and the sulfur content in the gas is controlled to account for 0.9%, so that the hydrocarbons are in the hydrogen atmosphere. Catalytic cracking into carbon particles deposited on the crystal surface of the composite catalyst, reacting for two hours to obtain a spiral carbon fiber composited by multiple nano-carbon filaments, the diameter of the spiral is 4.2 μm, the pitch is 1.2 μm, and the measured rigidity rate is 10.3 Gpa.

Embodiment 3

[0051] Synthetic Example three: the supported catalyst is pressed at 10mg / cm 2 The amount of acetylene is tiled on the surface of the substrate placed in the reactor. The reactor is kept at a constant temperature of 800-850°C under a nitrogen atmosphere, and gaseous hydrocarbons and hydrogen are introduced. The ratio of the amount of hydrocarbons introduced is 0.5:1, the ratio of the amount of nitrogen and hydrogen introduced is 0.5:1, and the hydrogen is used to carry the sulfur-containing substance thiophene into the reaction system, and the sulfur content in the control gas accounts for 0.1%. , the hydrocarbons are catalytically cracked into carbon particles in a hydrogen atmosphere and deposited on the crystal surface of the composite catalyst, and react for two hours to obtain a spiral-shaped carbon fiber composited by multiple nano-carbon filaments, with a spiral diameter of 1.9 μm and a pitch of 0.5 μm , the measured rigidity rate is 11.7Gpa.

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Abstract

The invention discloses multi-nano carbon filament composite carbon fiber which is multi-nano carbon filament composite convolute carbon fiber, wherein the scalability conforms to the Hooke's law, andthe rigidity exceeds 9.8Gpa. The convolution diameter of the composite carbon fiber is 0.1-10mu m, and the thread pitch is 0.1-5.5mu m; the diameter of the carbon subfiber forming the composite carbon fiber is 0.05-1.5mu m; the subfiber is obtained by combining a plurality of carbon filaments with diameter of 50-500nm; the composite carbon fiber is convoluted regularly with constant convolution diameter and thread pitch along a convolution shaft. With the technical scheme, the multi-nano carbon filament composite carbon fiber disclosed by the invention has the following advantages in comparison with the prior art: the preparation technology is simple and easy to implement; the multi-nano carbon filament composite carbon fiber disclosed by the invention has a regular convolute form, certain thread pitch and elasticity and rigidity, and is suitable for being used independently as a micro mechanical element.

Description

technical field [0001] The invention relates to a composite carbon fiber with multiple nanometer carbon filaments, that is, a method for preparing composite carbon fibers with multiple nanometer carbon filaments, belonging to the technical field of multifunctional carbon fiber materials. Background technique [0002] In the field of carbon fiber materials, the convoluted carbon fiber has broad prospects for application in electromagnetic materials and composite material additives due to its excellent properties of carbon materials and its unique convoluted shape. Therefore, the optimization of its preparation and its own characteristics is the key research object in the field of this type of carbon fiber material. [0003] The current method of synthesizing spiral carbon fibers is to use nickel-catalyzed chemical vapor deposition (Chemical Vapor Deposition, CVD for short), and what can be obtained in large quantities are microcoils formed by tightly coiled double carbon fila...

Claims

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Application Information

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IPC IPC(8): D01F9/127
CPCD01F9/1271D01F9/1273D01F9/1275
Inventor 陈秀琴杨少明池至铣
Owner 泉州工艺美术职业学院
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