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Self-supporting disordered graphite carbon/carbon nanotube composite spring and preparation method and application thereof

A carbon nanotube composite, carbon nanotube fiber technology, applied in spring/shock absorber manufacturing, springs, low internal friction springs, etc. Good stability, simple operation, good self-supporting effect

Active Publication Date: 2021-07-06
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unique helical structure is completely different from the straight fiber in terms of mechanical properties. The embedding of this helix can change the tensile and elastic properties of the fiber (such as patents CN110485162A and CN107805865A), but as far as the current technology is concerned, pure physical twisting can obtain The CNT helical structure must be under the action of external force to maintain the stability of the helical structure. For example, under the action of heavy objects, it can prevent the untwisting of CNT fibers. The stability under such external force interference will greatly limit its application scenarios.
In other methods, in order to obtain a stable self-supporting helical structure, other substances, such as polymers, etc. are introduced, which will greatly reduce the intrinsic properties of carbon nanotube fibers, such as a decrease in electrical conductivity, Decreased thermal stability, etc.

Method used

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  • Self-supporting disordered graphite carbon/carbon nanotube composite spring and preparation method and application thereof
  • Self-supporting disordered graphite carbon/carbon nanotube composite spring and preparation method and application thereof
  • Self-supporting disordered graphite carbon/carbon nanotube composite spring and preparation method and application thereof

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preparation example Construction

[0030] One aspect of the embodiments of the present invention provides a method for preparing a self-supporting disordered graphitic carbon / carbon nanotube composite spring, which includes:

[0031] Provide carbon nanotube fibers;

[0032] Fixing the carbon nanotube fibers on a template with a helical structure by physical winding;

[0033] And, adopt the chemical vapor deposition method to carry out the deposition of amorphous graphitic carbon to the obtained helical carbon nanotube fiber wound on the template, thereby obtain the self-supporting disordered graphitic carbon / carbon nanotube composite spring with helical spring structure ( DG / CNT spring).

[0034] Further, the thread and pitch of the formwork with thread structure in the present invention can be designed in different sizes according to the application scenarios, and the dimensional parameters of the prepared composite spring are exactly the same as those of the formwork.

[0035] In some more specific embodime...

Embodiment 1

[0064] (1) Winding the CNT fiber on a quartz stud with thread, the thread diameter of the quartz stud is 5mm, and the pitch is 1mm;

[0065] (2) placing the fixed carbon nanotube fiber together with the quartz stud in the reaction chamber of the chemical vapor deposition equipment;

[0066] (3) Introduce methane and hydrogen into the reaction chamber, so that methane begins to pyrolyze at 1000°C to generate disordered graphitic carbon, which is deposited on the surface of the carbon nanotube fiber at the same time, and the deposition time is 30 minutes to obtain DG / CNT fiber composite materials;

[0067] (4) After the chemical vapor deposition is completed, the DG / CNT fiber is disassembled from the quartz stud to obtain a self-supporting disordered graphite carbon / carbon nanotube composite spring (DG / CNT spring), and the prepared DG / CNT spring Macro picture such as image 3 As shown, the topography of the microstructure is shown in Figure 4 and Figure 5 shown.

[0068] ...

Embodiment 2

[0073] (1) Winding the CNT fiber on a quartz stud with thread, the thread diameter of the quartz stud is 1.5mm, and the pitch is 0.5mm;

[0074] (2) placing the fixed carbon nanotube fiber together with the quartz stud in the reaction chamber of the chemical vapor deposition equipment;

[0075] (3) Introduce methane and hydrogen into the reaction chamber, so that methane begins to pyrolyze at 1000°C to generate disordered graphitic carbon, which is deposited on the surface of the carbon nanotube fiber at the same time, and the deposition time is 30 minutes to obtain DG / CNT fiber composite materials;

[0076] (4) After the chemical vapor deposition is completed, the DG / CNT fiber is disassembled from the quartz stud to obtain a self-supporting disordered graphite carbon / carbon nanotube composite spring (DG / CNT spring), and the prepared DG / CNT spring pictures such as Figure 7 As shown, the topography of the microstructure and Figure 4 and Figure 5 unanimous.

[0077] Perf...

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Abstract

The invention discloses a self-supporting disordered graphite carbon / carbon nanotube composite spring and a preparation method and application thereof. The preparation method comprises the following steps that carbon nanotube fibers are uniformly and orderly wound on a template with a thread structure; and a chemical vapor deposition method is adopted to perform amorphous graphite carbon deposition on the obtained spiral carbon nanotube fibers wound on the template, so that the self-supporting disordered graphite carbon / carbon nanotube composite spring with a spiral spring structure is obtained. According to the preparation method, the self-supporting disordered graphite carbon / carbon nanotube composite spring is successfully prepared by utilizing the chemical vapor deposition method and inducing configuration through the template, and the prepared composite spring has very good structural stability; and meanwhile, the preparation method provided is simple to operate and high in repeatability, and the size regulation and control of the light full-carbon spring spiral structure can be realized.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a self-supporting disordered graphite carbon / carbon nanotube composite spring and its preparation method and application. Background technique [0002] Wearable devices are an important development trend of future electronic equipment. In recent years, with the concept of electronic skin, flexible mobile phone, etc., and the continuous deepening of research, new (such as flexible, stretchable, bendable, etc.) energy storage and supply units and strain sensors compatible with living organisms quickly gained attention. Carbon nanotubes (CNTs) have quasi-one-dimensional properties and excellent electrical, thermal and mechanical properties. Their macroscopic aggregates---fibers are inherently lightweight, flexible, stretchable, and bendable. They are ideal for preparing wearables. It is an ideal material for functional devices, and it has broad application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F1/06F16F1/02
CPCF16F1/06F16F1/024F16F1/021F16F2226/04F16F2224/005F16F2224/02
Inventor 邸江涛巩倩余盈荧李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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