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Thermally-stimulated fluorescence/visible light color double-response capsule and synthesis method thereof

A synthesis method and thermal stimulation technology, applied in chemical instruments and methods, luminescent materials, textiles and papermaking, etc., can solve problems such as difficulty in meeting, change in judgment of temperature changes, inapplicability, etc., to simplify the preparation process and maintain stable performance. , The effect of temperature sensitive response speed

Active Publication Date: 2021-04-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the thermally responsive color-changing materials currently reported only have a single function (thermally responsive color-changing or thermally-responsive fluorescent color-changing), which is often difficult to meet the needs of complex environments and special uses in actual production, such as multiple anti-counterfeiting, encryption, etc., although few Some materials have the function of thermally stimulating visible light color / fluorescence dual response, but the thermal fluorescence changes of such materials are basically concentrated on the change of intensity, and it is difficult for the naked eye to judge the change of temperature through the change of fluorescence, which is not suitable for routine actual production and life
[0003] Therefore, it is still a challenge to develop thermally-responsive color-changing materials in the visible and ultraviolet regions, especially these reversible optically responsive dual-output materials with high contrast and stable performance.

Method used

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  • Thermally-stimulated fluorescence/visible light color double-response capsule and synthesis method thereof
  • Thermally-stimulated fluorescence/visible light color double-response capsule and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolve 10mmol 4-dimethylaminosalicylaldehyde in 5mL ethanol, add 5mmol dimethyl malonate and 0.5mL catalyst piperidine, stir well, and keep stirring the mixture at 80°C for 2h under reflux 50mL of deionized water was added after the reaction, followed by extraction with ethyl acetate 3 times, adding 50mL each time to obtain a crude product, which was then separated and purified by chromatography, and dried to obtain a yellow powder color body molecule.

[0029] 1 H NMR test results such as figure 1 As shown, it can be found from the figure that there are significant absorption peaks at chemical shifts 2.75-2.90, 3.7-3.9, and 8.7-8.9, which are characteristic peaks of hydrogen on methyl and vinyl groups, and chemical shifts are 6.5-6.6, 7.5- The absorption peak at 7.6 is the characteristic peak of hydrogen on the benzene ring.

[0030] (2) 0.1 g of the purified product in step (1) was mixed with 5 g of stearyl alcohol, heated to 90° C., and magnetically stirred a...

Embodiment 2

[0035] (1) Dissolve 10mmol of 4-dimethylaminosalicylaldehyde in 10mL of ethanol, add 15mmol of dimethyl malonate and 1mL of catalyst piperidine, stir evenly, and keep stirring the mixture at 70°C for 4h under reflux; Add 50mL deionized water after the reaction finishes, then extract 6 times with ethyl acetate, add 50mL each time, obtain crude product, then separate and purify by chromatographic chromatography, obtain yellow powder chromophore molecule after drying, its 1 H NMR test result is substantially identical with embodiment 1;

[0036] (2) Mix 0.1 g of the purified product in step (1) with 30 g of cetyl alcohol, heat to 80° C., and magnetically stir at a speed of 1500 rpm for 0.5 h, and obtain a yellow solid after the reaction is cooled;

[0037] (3) The yellow solid obtained in 1g step (2) and 5g polymethyl methacrylate are dissolved in 10g methylene chloride, then add 0.05g N-dodecyldimethylamine and 300g deionized water, room temperature After homogenizing for 10 mi...

Embodiment 3

[0041](1) Dissolve 10mmol 4-dimethylaminosalicylaldehyde in 30mL ethanol, add 30mmol dimethyl malonate and 5mL catalyst piperidine, stir evenly, and keep stirring the mixture at 95°C for 1h under reflux; Add 50mL deionized water after reaction finishes, then extract 4 times with ethyl acetate, add 50mL each time, obtain crude product, then separate and purify by chromatographic chromatography, obtain yellow powder chromophore molecule after drying, its 1 H NMR test result is substantially identical with embodiment 1;

[0042] (2) Mix 0.1 g of the purified product in step (1) with 10 g of myristyl alcohol, heat to 60° C., and magnetically stir at a speed of 100 rpm for 2 h, and obtain a yellow solid after the reaction is cooled;

[0043] (3) 1g of the yellow solid obtained in step (2) and 3g of polysulfone were dissolved in 20g of methylene chloride, followed by adding 0.005g of sorbitan monooleate and 150g of deionized water, at room temperature, at 25000rpm After 60 minutes ...

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Abstract

The invention discloses a thermal-stimulated fluorescence / visible light color double-response capsule and a synthesis method thereof, and belongs to the technical field of chemical synthesis. Through specific molecular structure design, 4-dimethylamino salicylaldehyde and dimethyl malonate are subjected to grafting reaction to prepare chromophoric molecules with a plurality of unsaturated functional groups, the chromophoric molecules are mixed with a phase change material to realize optical double-response reversible output of solvent phase state regulation, and compared with a conventional three-component organic thermal response material, the product only needs two components, namely chromophoric body molecules and a phase change solvent, so that the preparation process is simplified, and the performance stability is high. After microcapsule coating, the material is free from influence of adverse environment, and the performance is stably maintained, so that long-term stable use is realized.

Description

technical field [0001] The invention relates to a heat-stimulated fluorescence / visible light color dual-response capsule and a synthesis method thereof, belonging to the technical field of chemical synthesis. Background technique [0002] The physical properties of thermoresponsive materials change as the external temperature changes. Among them, optical thermoresponsive materials, such as thermochromic materials and thermoluminescent materials, can be widely used in sensing, temperature indication, energy saving, clothing, camouflage and health monitoring and other fields. According to their properties, thermally responsive color-changing materials are mainly divided into four categories: inorganic, organic, liquid crystal and photonic crystal. Among them, organic thermochromics have attracted extensive attention due to their advantages of diverse colors, low cost, and high extinction coefficient. However, most of the thermally responsive color-changing materials currentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/02D06M23/12D06M13/144D06M13/188D06M13/368D06M101/06
Inventor 张婉于伟东刘雯雯陈坤林殷允杰王潮霞
Owner JIANGNAN UNIV
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