Cellulose-dopamine/carbon nano tube based conductive fiber and preparation method and application thereof

A carbon nanotube and conductive fiber technology, which is applied in the field of cellulose-dopamine/carbon nanotube conductive fibers and their preparation, can solve the problems that affect the commercialization process of CNTs and is difficult to disperse uniformly, and achieves strong practicability and cost. Inexpensive, high mechanical properties

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

Carbon nanotubes (CNTs), a tubular carbon material with high axial strength and high electrical conductivity, have become a research hotspot for flexible conductive materials, but their inherent defects that are difficult to uniformly disperse have affected the commercialization of CNTs.

Method used

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  • Cellulose-dopamine/carbon nano tube based conductive fiber and preparation method and application thereof
  • Cellulose-dopamine/carbon nano tube based conductive fiber and preparation method and application thereof
  • Cellulose-dopamine/carbon nano tube based conductive fiber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of dopamine-modified cellulose aqueous solution

[0035] 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.

[0036] (2) Preparation of cellulose-dopamine / carbon nanot...

Embodiment 2

[0042] (1) Preparation of dopamine-modified cellulose aqueous solution

[0043] 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.

[0044] (2) Preparation of cellulose-dopamine / carbon nanotub...

Embodiment 3

[0051] (1) Preparation of dopamine-modified cellulose aqueous solution

[0052] 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.

[0053] (2) Preparation of cellulose-dopamine / carbon nanot...

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Abstract

The invention discloses a cellulose-dopamine / carbon nano tube based conductive fiber and a preparation method and application thereof. Through a wet spinning method, dopamine (DA)-modified carboxymethylcellulose (CMC) is used as a fiber framerwork, a carbon nano tube (CNT) is used as conductive filler, and the cellulose-dopamine / carbon nano tube based conductive fiber is prepared and is furthermore prepared into a flexible sensor. The flexible sensor formed by assembling the conductive fiber has the characteristics of high flexibility, high mechanical property, high conductivity and strain sensitivity and is expected to serve as new wearable electronic equipment to serve for future robots, artificial limb users and human body real-time motion detection equipment. According to the cellulose-dopamine / carbon nano tube based conductive fiber, the raw material source is rich, the cost is low, the preparation process is simple, the implantation performance is high, and the cellulose-dopamine / carbon nano tube based conductive fiber has huge potential in application to the fields of wearable electronic devices, flexible energy devices and the like.

Description

technical field [0001] The invention belongs to the field of flexible polymer conductive materials, and in particular relates to a cellulose-dopamine / carbon nanotube-based conductive fiber and its preparation method and application. Background technique [0002] By 2022, the global usage of textile electronic products is expected to exceed one trillion pieces per year, and the rapid development of the Internet of Things has aroused great attention and higher requirements for electronic sensing technology. Carbon nanotubes (CNTs), a tubular carbon material with high axial strength and high electrical conductivity, have become a research hotspot for flexible conductive materials, but their inherent defects that are difficult to disperse uniformly have affected the commercialization of CNTs. At the same time, growing environmental problems have increased the use and development of clean energy. Carboxymethylcellulose (CMC), as a polyanionic polysaccharide obtained by reacting ...

Claims

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Application Information

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IPC IPC(8): D01F2/24D01F1/09D01D5/06G01G3/14C08B15/06
CPCD01F2/24D01F1/09D01D5/06G01G3/14C08B15/06
Inventor 金永灿郭天雨万章敏宋君龙
Owner NANJING FORESTRY UNIV
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