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Carbon nanotube fiber composite material, its preparation method and application

A carbon nanotube fiber, carbon nanotube technology, applied in fiber processing, fiber chemical characteristics, cellulose/protein conjugated rayon, etc. The material cannot meet the multi-functional requirements of smart textiles and clothing, and achieve the effect of excellent electrical conductivity and mechanical properties.

Active Publication Date: 2020-07-14
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, due to the limitations of the existing spinning process, the prepared fiber materials cannot meet the multifunctional needs of smart textile clothing
For example, the fiber materials prepared from carbon nanotube materials have poor electrical conductivity and mechanical properties, which cannot meet the requirements for the preparation of smart textile clothing.

Method used

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  • Carbon nanotube fiber composite material, its preparation method and application
  • Carbon nanotube fiber composite material, its preparation method and application
  • Carbon nanotube fiber composite material, its preparation method and application

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preparation example Construction

[0046] A method for preparing a carbon nanotube fiber composite material provided by an embodiment of the present invention comprises the following steps:

[0047] S1. Preparation of internal spinning solution

[0048] The carbon nanotube spinning solution is an internal spinning solution, which is used to form an inner layer structure during coaxial spinning. The internal spinning solution is obtained by mixing carbon nanotubes and concentrated sulfuric acid. On the one hand, concentrated sulfuric acid can be used as a dispersant for carbon nanotubes, and on the other hand, it can also provide an acidic environment during cellulose regeneration.

[0049] Preferably, the mixing process is to stir for 0.5-1.5 h first, and then filter after ultrasonic treatment for 20-50 min. The carbon nanotubes can be uniformly dispersed in the concentrated sulfuric acid by first stirring and then ultrasonic treatment, and the dispersibility of the carbon nanotubes in the cellulose can be imp...

Embodiment 1

[0074] The present embodiment provides a kind of preparation method of carbon nanotube fiber composite material, it comprises the following steps:

[0075] First, a 1 wt% MWCNTs dispersion was prepared. By adding MWCNTs to concentrated H 2 SO 4 and stirred at room temperature (about 25 °C) for 1 h, then sonicated (100 W, 30 min) using a KQ-50DE water bath sonicator, and then the mixture was passed through a 30 μm syringe filter to remove aggregates.

[0076] Next, a 4 wt% cellulose solution was prepared. First, 11.68 g of urea was added to 29.2 mL of 40 wt % TBAH solution (V TBAH :m urea =1:0.4), and stirred at 180 rpm for 30 minutes. Then 1.72 g of α-cellulose was added to the above solution and stirred for 1 hour to prepare a uniform solution to prepare a 4 wt% cellulose solution. Finally, the prepared 4 wt% cellulose solution was centrifuged at 5000 rpm for 10 min to remove air bubbles.

[0077] Finally, coaxial spinning. Concentrated sulfuric acid (H 2 SO 4 ) and...

Embodiment 2

[0079] The present embodiment provides a kind of preparation method of carbon nanotube fiber composite material, it comprises the following steps:

[0080] First, a 0.5wt% MWCNTs dispersion was prepared. By adding MWCNTs to concentrated H 2 SO 4 and stirred at room temperature (about 25 °C) for 0.5 h, then sonicated (100 W, 20 min) using a KQ-50DE water bath sonicator, and then the mixture was passed through a 30 μm syringe filter to remove aggregates.

[0081] Next, a 3 wt% cellulose solution was prepared. First, 8.76 g of urea was added to 29.2 mL of 35 wt % TBAH solution (V TBAH :m urea =1:0.3), and stirred at 180 rpm for 30 minutes. Then α-cellulose was added to the above solution and stirred for 1 hour. Finally, the prepared cellulose solution was centrifuged at 4000 rpm for 15 min to remove air bubbles.

[0082] Finally, coaxial spinning. Concentrated sulfuric acid (H 2 SO 4 ) and sodium sulfate (Na 2 SO 4 ) dissolved in deionized water (H 2 SO 4 : Na 2 SO...

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Abstract

The invention discloses a carbon nano tube fiber composite material, a preparation method and application thereof and a coaxial spinning device, and relates to the technical field of carbon nano tubes. The carbon nano tube fiber composite material comprises a carbon nano tube inner core and a cellulose outer shell coated on the carbon nano tube inner core; according to the preparation method of the carbon nano tube fiber composite material, the cellulose coated carbon nano tube composite material can be prepared through the coaxial spinning process, the performance advantage of the carbon nano tubes can be fully utilized, the material has the very good conductive property and the mechanical property, and can be applied in preparation of a strain transducer, a heating piece, a temperature sensor and a wearable device. The coaxial spinning device used for implementing the preparation method can achieve the spinning process of the cellulose coated carbon nano tubes, a double-layer spinning structure is formed, and the device is suitable for application and popularization.

Description

technical field [0001] The invention relates to the technical field of carbon nanotubes, and in particular to a carbon nanotube fiber composite material, a preparation method and application thereof. Background technique [0002] Flexibility is the biggest feature of intelligent textile technology. Thanks to this feature, the product is light, can touch the skin in a large area, fit the shape of human skin, and can be deformed at will without affecting human activities and product functions. Long-term wear. Product design has also become more fashionable and comfortable, which is a subversive technology. [0003] Fiber material science is the foundation to realize the transformation of the flexibility of such products, and wearable devices are a collection of flexible electronics, photonics and other technologies based on such fiber materials. Thanks to this flexible feature, wearable technology achieves more stable, more diverse, and safer functions. Smart textile clothi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/18D01F8/02D01D5/34D01D5/06
CPCD01D5/06D01D5/34D01F8/02D01F8/18
Inventor 孟凡彬荆长飞周祚万喻婷婷韦炜李金阳王泽永姜曼徐晓玲
Owner SOUTHWEST JIAOTONG UNIV
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