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Graphene electrochemical reduction dyeing device and method

A technology of graphene electrochemical and dyeing devices, which is applied in the field of graphene electrochemical reduction dyeing devices, can solve problems such as endangering workers' health and environmental pollution, and achieve the effects of improving production efficiency, reducing production costs, and improving current efficiency

Inactive Publication Date: 2018-10-12
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polysulfide or sodium sulfide as a reducing agent will produce toxic gas hydrogen sulfide, which will endanger the health of workers. Sulfur dyes contain too much sulfur as an impurity. Hydrogen gas will cause serious environmental pollution

Method used

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  • Graphene electrochemical reduction dyeing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In the electrolytic cell, sodium hydroxide aqueous solution, triethanolamine and sulfur dyes are sequentially added to prepare an electrolyte, wherein the concentration of sodium hydroxide in the electrolyte is 0.15mol / L, the concentration of triethanolamine is 0.02mol / L, and the sulfur dye The concentration is 0.01mol / L. Turn on the driving device and connect to the DC power supply. The 100-mesh steel plate of the anode grid stirs the electrolyte and starts the electrochemical reduction reaction. Adding an appropriate amount of ion migration aid can speed up the reduction efficiency of sulfur dyes. The current density is 0.5 ampere / square decimeter, and the electric current reduction is 30 minutes, and the measured current efficiency is 82.3%.

Embodiment 2

[0044]In the electrolytic cell, sodium hydroxide aqueous solution, triethanolamine and sulfur dyes are sequentially added to prepare an electrolyte, wherein the concentration of sodium hydroxide in the electrolyte is 0.2mol / L, the concentration of triethanolamine is 0.15mol / L, and the sulfur dye The concentration is 0.02mol / L. Turn on the driving device and connect to the DC power supply. The 150-mesh steel plate of the anode grid stirs the electrolyte and starts the electrochemical reduction reaction. Adding an appropriate amount of ion transfer additive can speed up the reduction efficiency of sulfur dyes. The current density is 0.7 ampere / square decimeter, and the electric current reduction is 30 minutes, and the measured current efficiency is 83.4%.

Embodiment 3

[0046] In the electrolytic cell, sodium hydroxide aqueous solution, triethanolamine and sulfur dyes are sequentially added to prepare an electrolyte, wherein the concentration of sodium hydroxide in the electrolyte is 0.1mol / L, the concentration of triethanolamine is 0.1mol / L, and the concentration of sulfur dye is 0.1mol / L. The concentration is 0.15mol / L. Turn on the driving device and connect to the DC power supply. The 100-mesh nickel plate of the anode grid stirs the electrolyte and starts the electrochemical reduction reaction. Adding an appropriate amount of ion transfer additive can speed up the reduction efficiency of sulfur dyes. The temperature of the electrolyte is 30°C. The electrolytic current density is 0.5 ampere / square decimeter, and the electric current reduction is 30 minutes, and the measured current efficiency is 80.4%.

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Abstract

The invention provides a graphene electrochemical reduction dyeing device and method to overcome the shortcomings in the prior art. The device comprises an electrolytic tank. The bottom of the electrolytic tank is fixedly provided with a cathode in the horizontal and transverse direction, and the cathode is a graphene plate. An anode is disposed horizontally in the middle of the electrolytic tank,and a driving device for driving the anode to reciprocate up and down is arranged outside the electrolytic tank. The device accelerates the electrochemical reduction rate, improves the current efficiency, ensures the dyeing quality by monitoring the redox potential of an electrolyte, fully filtering and evenly mixing, achieves dyeing directly in the electrolytic tank, reduces drug consumption, improves space utilization, greatly reduces the production cost and improves the production efficiency of the industrial production of such process.

Description

technical field [0001] The invention belongs to the technical field of vat dyeing, and in particular relates to a graphene electrochemical vat dyeing device and method. Background technique [0002] Powdered sulfur dyes, dye structure general formula: D-S-S-D, generally need to be boiled with sodium sulfide, dissolved and used. The production process of sulfur dyes and reactive dyes is relatively simple, widely used at home and abroad, and a kind of dye with relatively low price and cost. Sulfur dyes are insoluble in water, and sodium sulfide or other reducing agents are required to reduce the dyes to soluble leucosomes during dyeing. It has an affinity for fibers and dyes fibers, and then restores its insoluble state and fixes on fibers after oxidation and color development. Sulfur dyes can be used for dyeing cotton, linen, viscose and other fibers. The manufacturing process is relatively simple and the cost is low. It can be dyed in a single color, and can also be mixed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06B3/04D06B23/20D06P5/20D06P1/38
CPCD06B3/04D06B23/20D06P1/38D06P5/2016
Inventor 易长海李圣熊伟徐杰
Owner WUHAN TEXTILE UNIV
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