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A tungsten-containing dye composition, its preparation method and application

A composition and fabric technology, which is applied in the field of tungsten-containing dye compositions, can solve the problems that the development of the synthesis process is still in progress, the progress is not large, and the processing cost is high, and it is beneficial to large-scale production, with small equipment investment and simple process. Effect

Active Publication Date: 2018-03-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the discoloration efficiency still cannot be used in actual production and life
[0006] Secondly, the existing decorative painting process of tungsten metal oxide and its salt materials has not made much progress, because the performance of the composite material itself restricts its development, and the development of the synthesis process is still in progress
[0007] Thirdly, color-changing fabrics made of pure organic polymers have appeared in recent years, but the problems of short radiation resistance and high processing costs have yet to be solved, which also restricts the application range and occasions of composite materials.

Method used

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  • A tungsten-containing dye composition, its preparation method and application
  • A tungsten-containing dye composition, its preparation method and application
  • A tungsten-containing dye composition, its preparation method and application

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preparation example Construction

[0029] The invention also discloses a preparation method, comprising the following steps:

[0030] Precursor preparation:

[0031] In the first step, in water or other organic liquids, add tungsten metal oxide or salt monomer with -CH 2 CH 2 Organic substances with OH functional groups, such as formaldehyde, polyethylene glycol, pluronic series polymers, various organic polymer block polymers with polyethylene oxide groups, and acid or organic and inorganic substances with acid groups Acids, such as tartaric acid, EDTA, etc. in weak acids, oxalic acid, citric acid, benzenesulfonic acid, etc. in medium-strong acids, strong acids such as sulfuric acid, hydrochloric acid, nitric acid, etc., polymers with acid functional groups such as acrylic acid, polyacrylic acid, 2-propylene Amide-2-methylpropanesulfonic acid, poly(2-acrylamide-2-methylpropanesulfonic acid), etc. To be dissolved and clarified for use.

[0032] Dye preparation:

[0033] Make the dispersion containing t...

Embodiment 1

[0043] Colloid preparation and judgment:

[0044] Add 100ml of deionized water to the reaction flask, then add 20g of PEG (molecular weight: 5000) and 2g of sodium tungstate, stir until it is completely dissolved by magnetic force, add 2mol / L dilute sulfuric acid to pH 1, keep the acidity, and dissolve completely, The clear solution without precipitation after standing for a long time for more than 12 hours is the precursor solution.

[0045] Judgment standard: at a light intensity of 10mW / cm 2 Within 10 seconds of irradiating with a special UV lamp, there will be a color change visible to the naked eye, from clear and transparent to dark blue. Its UV-Vis spectrum is figure 1 1 of them.

Embodiment 2

[0047] Add 50ml of deionized water and 50ml of ethanol to clarify the mixed solvent in the reaction flask, then add 40g of PEG (molecular weight 2000) and 3g of sodium tungstate, stir until it is completely dissolved by magnetic force, add dilute sulfuric acid to adjust the pH to 3, dissolve completely, for a long time Set aside for 24 hours to clarify. That is, the precursor solution is obtained. Then add chitosan 1g and hexadecyltrimethylammonium bromide 0.2g, judging standard: at light intensity 10mW / cm 2 Within 10 seconds of irradiating with a special UV lamp, there will be a color change visible to the naked eye, from clear and transparent to dark blue. Its UV-Vis spectrum is figure 1 2 of them.

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Abstract

The invention discloses a tungstenic dye composition, a preparation method and an application of the tungstenic dye composition, and relates to the domain of a photochromic dye. Tungstate and / or tungstenic metal oxide in the solvent can form photochromic fluid after adding acid and dissolving macromolecule containing -CH2-CH2-OH functional group; a weak bond can be formed with macromolecule containing -CH2-CH2-OH functional group under the effect of hydrogen bond; thus the electron energy state density rises up, and the composition is good for the photovoltaic conversion result. When irradiation of wave length with an energy gap is satisfied, enhanced electronic migration can be generated, and tungsten oxide or salt follows the change of absorption spectrum. After heating the fluid at 30 to 200 DEG C, the formed gel has similar photochromic effect. The photochromic dye is prepared by dyeing, color-fixing, washing, and drying the fluid and others. Under the strong ultraviolet light, the macroscopic significant color changing effect can be reached within 3 minutes, and the ultraviolet-visible-near infrared transmitted spectrum becomes small along with the prolonged lighting time.

Description

technical field [0001] The invention relates to the technical field of photochromic dyes, in particular to a tungsten-containing dye composition, its preparation method and application. Background technique [0002] Organic-inorganic composite materials are new functional materials developed in the past ten years. This material can respond to external environmental stimuli, such as temperature, humidity, electric field, magnetic field, electromagnetic waves, etc., and undergo functional changes (such as discoloration, hydrophilicity and hydrophobicity). changes, changes in softness and hardness, etc.). When the stimulus is removed, the functional change disappears and the material returns to its original state. In recent years, with the shortage of energy sources, the research on energy-saving materials has become an important issue that people pay close attention to. Since the response of composite materials to electromagnetic waves can dynamically adjust the input or out...

Claims

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Application Information

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IPC IPC(8): C09B67/00C09K9/00D06P1/00D06P3/60D06P3/04
CPCC09B67/0033C09B67/0071C09K9/00D06P1/004D06P3/04D06P3/60
Inventor 王聪韩晓东
Owner BEIJING UNIV OF TECH