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Oriented carbon nanotube/macromolecular composite fibers and preparation method thereof

A technology of orienting carbon nanotubes and carbon nanotube fibers, which is applied in the direction of carbon fiber, nanotechnology, fiber processing, etc., can solve the problems of electrical performance degradation, unfavorable application, and poor uniformity of composite fibers, etc., and achieve enhanced mechanical properties, electrical properties, etc. The effect of performance improvement

Active Publication Date: 2011-10-19
宁国市龙晟柔性储能材料科技有限公司
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Problems solved by technology

Since the gap between the carbon nanotubes in the fiber is only a few nanometers, it is difficult for the polymer with a large molecular weight to enter efficiently, and the uniformity of the obtained composite fiber is not good, which limits the improvement of performance
Moreover, although this kind of composite fiber improves the mechanical properties, it leads to the decline of electrical properties, which is not good for its application.
Furthermore, no one has quantitatively studied the relationship between the properties of polymers and the performance of composite fibers[18,25-28]

Method used

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  • Oriented carbon nanotube/macromolecular composite fibers and preparation method thereof
  • Oriented carbon nanotube/macromolecular composite fibers and preparation method thereof
  • Oriented carbon nanotube/macromolecular composite fibers and preparation method thereof

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preparation example Construction

[0037] 1. Preparation of carbon nanotube fibers.

[0038] First, synthesize carbon nanotube arrays that can be spun. Si / SiO 2 / Al 2 o 3 / Fe is the synthesis catalyst, where SiO 2 as the base, Al 2 o 3 The thickness of the buffer layer is 10-30 nm, and the thickness of Fe is 0.5-1.5 nm. It is deposited on a silicon wafer with an electron beam evaporation coater; with ethylene as the carbon source, argon and hydrogen as the carrier gas, chemical vapor deposition is used on the A highly oriented carbon nanotube array is synthesized on the catalyst substrate; the ethylene flow rate is 190-290 sccm, the argon flow rate is 400-620 sccm, and the hydrogen flow rate is 20-48 sccm, and the synthesis time is 5-100 min in a tube furnace. A spinnable carbon nanotube array is obtained.

[0039] Second, carbon nanotube fibers are obtained by spinning the above-mentioned synthesized carbon nanotube arrays. The steps are as follows: firstly pull out carbon nanotube ribbons from the carb...

specific Embodiment

[0045] With a monomer concentration of 8.05 mol L -1 , a precursor solution with a crosslinking degree of 0.24% as an example.

[0046] 1. Preparation of carbon nanotube fibers.

[0047] First, synthesize carbon nanotube arrays that can be spun. Si / SiO 2 / Al 2 o 3 / Fe is the synthesis catalyst, where SiO 2 as the base, Al 2 o 3 As a buffer layer, Fe as a catalytic layer, prepared by deposition on a silicon wafer with an electron beam evaporation coater; using ethylene as a carbon source, argon and hydrogen as a carrier gas, synthesized highly oriented on the catalyst substrate by chemical vapor deposition Carbon nanotube arrays; details of the synthesis have been reported in the literature.

[0048] Second, carbon nanotube fibers are obtained by spinning the above-mentioned synthesized carbon nanotube arrays. The steps are as follows: firstly pull out carbon nanotube ribbons from the carbon nanotube arrays, and use a spindle with a pointed probe to pull out carbon nano...

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Abstract

The invention belongs to the technical field of carbon nanotube fibers, and particularly relates to carbon nanotube / macromolecular composite fibers and a preparation method thereof. The preparation method comprises the following steps of: infiltrating the carbon nanotube fibers into acrylic acid monomer solution, and performing topochemical polymerization. In the preparation method, the tensile strength and conductivity of the composite fibers are measured, and the mechanical and electrical properties of the carbon nanotube / polyacrylic acid composite fibers are studied by comparing the composite fibers with pure carbon nanotube fibers. The influence of the monomer concentration of precursor solution and the crosslinking degree of macromolecules on the mechanical strength of the composite fibers is studied further. The oriented carbon nanotube / macromolecular composite fibers have high mechanical strength and conductivity, the preparation method is simple, and a new path is provided forthe preparation of carbon nanotube fiber reinforced materials.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube fibers, and in particular relates to an oriented carbon nanotube / polymer composite fiber and a preparation method thereof. Background technique [0002] Carbon nanotubes (Carbon Nanotubes, CNTs) were discovered by Iijima of NEC Corporation in Japan in 1991, which is a milestone in the history of science [1-3]. Carbon nanotubes have excellent physical and chemical properties and have been widely studied and applied in many fields [4-8]. [0003] In order to maintain the excellent performance of carbon nanotubes during use, many people assemble carbon nanotubes into macroscopic fibers. The individual carbon nanotubes in this fiber are highly aligned and ordered, and the small differences between different carbon nanotubes are negligible, so they have high mechanical strength and electrical conductivity [9-11], and have been It is widely used in the field of high-performance structural mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/263C08F220/06C08F222/38C08F2/44D01F9/12C01B31/02B82Y40/00D06M101/40
Inventor 彭慧胜郭文瀚刘超孙雪梅仰志斌
Owner 宁国市龙晟柔性储能材料科技有限公司
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