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Electric heating wire based on cellulose-dopamine/carbon nanotube conductive fibers and application of electric heating wire

A technology of carbon nanotubes and conductive fibers, which is applied in the field of flexible polymer conductive materials, can solve the problems affecting the commercialization process of CNTs and the difficulty of uniform dispersion, and achieve the effects of strong implementability, fast heating speed, and abundant raw material sources

Active Publication Date: 2020-08-04
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Carbon nanotube (CNT) is a tubular carbon material with high axial strength and high electrical conductivity. It has become a research hotspot of flexible and thermally conductive materials, but its inherent defects that are difficult to uniformly disperse have affected the commercialization of CNT.

Method used

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  • Electric heating wire based on cellulose-dopamine/carbon nanotube conductive fibers and application of electric heating wire
  • Electric heating wire based on cellulose-dopamine/carbon nanotube conductive fibers and application of electric heating wire
  • Electric heating wire based on cellulose-dopamine/carbon nanotube conductive fibers and application of electric heating wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of dopamine-modified cellulose aqueous solution

[0039] Weigh 100 g of carboxymethyl cellulose sodium salt (molecular weight 700 kDa, degree of substitution 0.9), and prepare 0.5 wt % carboxymethyl cellulose aqueous solution. Add 0.96g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride into the above aqueous solution and stir mechanically for 1h, use 0.1mol L -1 Dilute hydrochloric acid to adjust the pH value of the solution to 4.5-5, continue to add 0.58g N-hydroxysuccinimide and 0.95g dopamine hydrochloride, in N 2 Under ambient conditions, mechanically stir for 24 hours at a speed of 1000 rad min -1 . Using a dialysis bag with a molecular weight cut-off of 3kDa, dialyze at room temperature for 5 days, and replace distilled water every 12 hours. Subsequently, a 2wt% DACMC light yellow transparent solution was obtained by suction filtration, and stored in a refrigerator at 4°C.

[0040] (2) Preparation of cellulose-dopamine / carbon nanot...

Embodiment 2

[0049] (1) Preparation of dopamine-modified cellulose aqueous solution

[0050] Weigh 100 g of carboxymethyl cellulose sodium salt (molecular weight 700 kDa, degree of substitution 0.9), and prepare 0.5 wt % carboxymethyl cellulose aqueous solution. Add 0.96g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride into the above aqueous solution and stir mechanically for 1h, use 0.1mol L -1 Dilute hydrochloric acid to adjust the pH value of the solution to 4.5-5, continue to add 0.58g N-hydroxysuccinimide and 0.95g dopamine hydrochloride, in N 2 Under ambient conditions, mechanically stir for 24 hours at a speed of 1000 rad min -1 . Using a dialysis bag with a molecular weight cut-off of 3kDa, dialyze at room temperature for 5 days, and replace distilled water every 12 hours. Subsequently, a 2wt% DACMC light yellow transparent solution was obtained by suction filtration, and stored in a refrigerator at 4°C.

[0051] (2) Preparation of cellulose-dopamine / carbon nanot...

Embodiment 3

[0057] (1) Preparation of dopamine-modified cellulose aqueous solution

[0058] Weigh 100 g of carboxymethyl cellulose sodium salt (molecular weight 700 kDa, degree of substitution 0.9), and prepare 0.5 wt % carboxymethyl cellulose aqueous solution. Add 0.96g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride into the above aqueous solution and stir mechanically for 1h, use 0.1mol L -1 Dilute hydrochloric acid to adjust the pH value of the solution to 4.5-5, continue to add 0.58g N-hydroxysuccinimide and 0.95g dopamine hydrochloride, in N 2 Under ambient conditions, mechanically stir for 24 hours at a speed of 1000 rad min -1 . Using a dialysis bag with a molecular weight cut-off of 3kDa, dialyze at room temperature for 5 days, and replace distilled water every 12 hours. Subsequently, a 2wt% DACMC light yellow transparent solution was obtained by suction filtration, and stored in a refrigerator at 4°C.

[0059] (2) Preparation of cellulose-dopamine / carbon nanot...

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Abstract

The invention discloses an electric heating wire based on cellulose-dopamine / carbon nanotube conductive fibers and the application of the electric heating wire. A wet spinning method is used, dopamine(DA) modified carboxymethyl cellulose (CMC) is used as a fiber framework, carbon nanotubes (CNT) are used as a conductive filler to prepare DACMC / CNT-based conductive fibers, and the DACMC / CNT-basedconductive fibers are further woven into electric heating wires. The electric heating wire woven by the conductive fibers has the characteristics of high strain sensitivity, high temperature rise speed and high moisture resistance, and is expected to be applied to wearable electronic equipment as a weaving material to serve a health-care electric heating device, a heating textile, human health monitoring and a human-computer interaction interface. The electric heating wire is rich in raw material source, low in cost, simple in preparation process and high in practicability, and has huge potential in the application in the fields of soft robot technologies, flexible energy devices and the like.

Description

technical field [0001] The invention belongs to the field of flexible polymer conductive materials, in particular to a heating wire based on cellulose-dopamine / carbon nanotube conductive fibers and its application. Background technique [0002] With the development of nanotechnology and the continuous expansion of textile functions, people gradually pay attention to the development of clothing, home textiles and industrial textiles in the direction of additional functions such as intelligence, interaction, and highly integrated functions. Smart textiles. As one of them, heating textiles have broad application prospects in the fields of improving fabrics to keep warm, maintaining body temperature, aerospace, and polar exploration. To make heating textiles have good comfort and safety, the heating wire is required to have the characteristics of good conductivity, good flexibility, strong corrosion resistance, and light weight. [0003] Carbon nanotube (CNT) is a tubular carb...

Claims

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Application Information

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IPC IPC(8): H05B3/14D01D1/02D01D1/10D01D5/06D01F1/09D01F2/28
CPCD01D1/02D01D1/103D01D5/06D01F1/09D01F2/28D10B2401/16D10B2403/02431H05B3/146
Inventor 金永灿郭天雨王莎万章敏
Owner NANJING FORESTRY UNIV
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