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Pure black dye, its preparation method and electrowetting display ink

A technology of black dye and black ink, applied in the field of electrowetting display ink

Active Publication Date: 2017-03-22
SHENZHEN GUOHUA OPTOELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent publication No. TW201215645 A1 reported the structure of the electrowetting black ink material based on the disazo structure, but after verification by the author, the dye is actually dark purple

Method used

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  • Pure black dye, its preparation method and electrowetting display ink
  • Pure black dye, its preparation method and electrowetting display ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Measure 10 mL of 20% water-soluble sulfur black solution, weigh 1.0 g of sodium sulfide and 5 g of n-dodecane bromide, dissolve them in a mixed solvent of 20 mL of ethanol and 20 mL of water, and heat to reflux for 24 hours. Cool the solution, pour off the supernatant liquid, take out the pure black ink at the bottom, dissolve it with 50mL of petroleum ether and filter to remove insoluble impurities, take the filtrate to rotary evaporate, dry and remove the solvent to obtain 4g of solid pure black dye Dye-1, take 1g of the above pure The black dye was dissolved in 5 mL of n-decane to obtain electrowetting black ink material K-1.

Embodiment 2

[0029] Weigh 2g of 100% monosulfur black, 1.5g of sodium sulfide, and 5g of n-octane bromide and dissolve them in a mixed solvent of 20mL of ethanol and 20mL of water, and heat to reflux for 24h. Cool the solution, pour off the supernatant liquid, take out the pure black ink at the bottom, dissolve it with 50mL of petroleum ether and filter to remove insoluble impurities, take the filtrate to rotary evaporate, dry and remove the solvent to obtain 2.9g of solid pure black dye Dye-2, take 1g of the above The pure black dye was dissolved in 5 mL of n-decane to obtain the electrowetting black ink material K-2.

Embodiment 3

[0031] Weigh 1g of 200% double sulfur black, 2.0g of sodium sulfide, and 5g of bromoisoctane, dissolve it in a mixed solvent of 20mL of methanol and 20mL of water, and heat to reflux for 24h. Cool the solution, pour off the supernatant liquid, take out the pure black ink at the bottom, dissolve it with 50mL of toluene and filter to remove insoluble impurities, take the filtrate and spin evaporate, dry and remove the solvent to obtain 3.8g solid pure black dye Dye-3, take 1g of the above pure The black dye was dissolved in 5 mL of n-decane to obtain electrowetting black ink material K-3.

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Abstract

Disclosed are a pure black ink dye and preparation method therefor, and an electrowetting displaying ink. The preparation method for the pure black ink comprises the following steps: adding a sulphur black dye, sodium sulphide, and a haloalkane to a solvent, and heating for refluxing; cooling and pouring out the supernatant liquor to obtain the pure black ink. The electrowetting displaying ink can be obtained by dissolving the pure black ink into an organic solvent. Because the structure of the sulphur black dye is complex, the components thereof have not been accurately analyzed yet. However, it is considered that the molecular structure of the sulphur black dye contains a great quantity of modifiable groups such as amino groups, hydroxyl groups, and sulphydryl groups. The present invention designs and synthesizes a pure black ink dye satisfying electrowetting displaying requirements by use of the special structure of the sulphur black dye. The prepared ink dye is pure black, and the solubility thereof in a non-polar solvent, decane, reaches 100%.

Description

technical field [0001] The invention relates to ink materials, in particular to pure black dye, its preparation method and electrowetting display ink. Background technique [0002] Electrowetting display (EFD, Electrofluide display), also known as electrowetting display, is a display based on the principle of electrowetting display first developed by Philips of the Netherlands in 2003. The display principle is to control the surface properties of the hydrophobic layer by changing the voltage, and change the contact angle of the ink layer on the hydrophobic layer. When no voltage is applied, the ink wets the insulating layer evenly to form a colored pixel point; when the voltage is applied, The effect of the electric field changes the surface properties of the hydrophobic layer to change the interfacial tension between the three phases of ink-polar liquid-hydrophobic layer, and the ink is compressed to form transparent or substrate-colored pixels, thereby obtaining the displa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/28C09D11/02
CPCC09D11/02
Inventor 周国富邓勇郭媛媛罗伯特·安德鲁·海耶斯
Owner SHENZHEN GUOHUA OPTOELECTRONICS