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Three-dimensional fiber/carbon nano tube multistage reinforcement and preparation method thereof

A carbon nanotube and nano-reinforcement technology, applied in carbon fiber, fiber processing, textiles and papermaking, etc.

Inactive Publication Date: 2012-01-25
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the growth of carbon nanotubes by chemical vapor deposition on carbon fiber substrates is mainly focused on carbon fiber one-dimensional (Hui Qian, J. Mater. Chem., 2010, 20, 4751-4762) or two-dimensional cloth (Qiao-Juan Gong, Composites Science and On Technology 67 (2007) 2986-2989), there is no relevant report on the uniform growth of carbon nanotubes in three-dimensional fiber braids

Method used

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  • Three-dimensional fiber/carbon nano tube multistage reinforcement and preparation method thereof
  • Three-dimensional fiber/carbon nano tube multistage reinforcement and preparation method thereof

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specific Embodiment approach

[0095] The following is only a further description of the present invention in combination with specific embodiments, rather than limiting the protection scope of the present invention.

[0096] The uniform distribution of the carbon nanotubes and carbon fibers was confirmed by SEM photographs. figure 2 The standard pictures to achieve the requirement of "carbon nanotubes pure without cracking carbon or very little, high coverage (carbon nanotubes wrapped on the fiber surface)" are shown.

Embodiment 1

[0098] The three-dimensional needle-punched carbon fiber braid is degummed, washed and dried, and then put into concentrated HNO 3 Activated in 0.5~2h, washed to neutral and dried, then vacuum impregnated in the concentration of 0.02mol / L Fe(NO 3 ) 3 in acetone solution for 2h. Put the dry catalyst-loaded three-dimensional carbon fiber braid in chemical vapor deposition / infiltration equipment, and after rising to 600 °C under the argon / nitrogen atmosphere, stop the gas flow into hydrogen and argon to convert Fe(NO 3 ) 3 Reduce to nano-Fe particles, close the gas and then feed ethylene, the reaction parameter is C 2 h 4 The residence time is 0.1s / cm, the furnace pressure is 40Kpa, and the reaction time is 5h. After the reaction, turn off the gas and cool to room temperature under an argon atmosphere to obtain a three-dimensional multi-level reinforcement with uniform distribution of carbon fibers and carbon nanotubes. wrapped fiber surface), such as figure 2 .

Embodiment 2

[0100] The three-dimensional fiber braid used is a three-dimensional five-directional braid, and the others are the same as in Example 1. The purely cracked carbon nanotubes grown inside the braid have few impurities and high coverage (evenly wrapping the fiber surface).

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Abstract

The invention provides a three-dimensional fiber / carbon nano tube multistage reinforcement. Carbon nano tubes (CNTs) as a nano wild phase grow in a three-dimensional fiber prefabricated member by using a chemical vapor infiltration (CVI) process to obtain the multistage reinforcement. The invention also provides a preparation method of the multistage reinforcement.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a technology and a method for preparing a multi-level reinforcing body and uniformly growing carbon nanotubes in a three-dimensional prefabricated body. Background technique [0002] Traditional composite materials are based on micron-scale fibers as reinforcements, and the performance of materials is enhanced through the reinforcement and toughening of fibers. For example, fiber-reinforced ceramic matrix composites are introduced through the introduction of fiber reinforcements, and the failure process is characterized by non-brittleness, so that the reliability of the material has been greatly improved. [0003] Carbon nanotubes (CNTs) were discovered by Japanese scholar Iijima in 1991, and their excellent mechanical, thermal and electrical properties have caused a worldwide research boom. Carbon nanotubes are formed by hexagonal grid-like SP2 hybridized...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02D06M11/74D06M101/40D06M11/83
Inventor 胡建宝董绍明胡志辉张翔宇王震鲁博杨金山李庆刚
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI