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Preparation method of thermochromism sensing materials

A sensing material and thermochromic technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of complicated operation, unfavorable detection, inconvenient carrying, etc., and achieve the effect of simple preparation and low cost

Inactive Publication Date: 2012-06-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen from the above technical scheme that the diacetylene-based reversible color-changing materials prepared in the prior art are all subjected to complex molecular modifications, and the operation is complicated, and most of the diacetylene-based reversible color-changing materials are in liquid state, which is inconvenient to carry and is not conducive to detection

Method used

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  • Preparation method of thermochromism sensing materials
  • Preparation method of thermochromism sensing materials
  • Preparation method of thermochromism sensing materials

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Preparation of thermally induced reversible discoloration solid-state sensing material of polydimethylsiloxane / glutamic acid-based polydiacetylene

[0038] (1) Synthesis of glutamate-based diacetylene molecules

[0039] References (Cheng Quan et al., Langmuir, 2000, volume 16, page 5334, Langmuir, 1998, volume 14, page 1974) in the synthetic glutamate-based diacetylene molecule, the specific method comprises the following steps:

[0040] 1) 0.34g 10,12-pentacethynoic acid [CH 3 -(CH 2 )11 -C≡C-C≡C-(CH 2 ) 8 -COOH] was dissolved in 20mL of dichloromethane, then added successively 0.14g N-hydroxysuccinimide, 0.23g1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, in The reaction was stirred (300 rpm) at room temperature for 12 hours. Concentrate the mixed solution on a rotary evaporator, then add 20 mL of ethyl acetate, and extract with water. The obtained organic phase was washed with anhydrous Na 2 SO 4 Dry for 12 hours and evaporate to dryness with a ...

Embodiment 2

[0050] Preparation of polydimethylsiloxane / pentacenoic acid polydiacetylene thermochromic solid-state sensing material

[0051] 1) Dissolve pentasynoic acid diacetylene in chloroform to obtain a 1mM solution; take 2.14mL of the above solution and mix it with 1.5g polydimethylsiloxane and 0.1g curing agent to obtain a mixture solution, and then remove the mixture under reduced pressure After adding chloroform in the solution, the mixture was cured at 30°C for 24 hours, and the cured product was irradiated for 5 seconds under a 254nm ultraviolet lamp to polymerize the polydiacetylene of pentadecynoic acid to form polydiacetylene and obtain a blue color. Thermochromic solid-state sensing materials;

[0052] 2) The thermochromic solid-state sensing material obtained in step 1) is heated from 20°C to 80°C, and then cooled from 80°C to 20°C. The color of the thermochromic solid-state sensing material gradually changes from blue to purple and then red during the heating process, and...

Embodiment 3

[0054] Preparation of polydimethylsiloxane / glutamic acid-based polydiacetylene thermally induced reversible discoloration liquid sensing material

[0055] (1) Synthesis of aminodiacetylene molecule

[0056] The synthetic aminodiacetylene molecule in bibliography (Richard E.Bruehl etc., Biochemistry, 2001, the 40th volume, 5964 pages), concrete method comprises the following steps:

[0057] 1) Mix 10mL 2.4mmol / L C 6 h 11 N=C=NC 6 h 11 The dichloromethane solution was added to 10mL2.45mmol / L 10,12-pentacosyldiynoic acid [CH 3 -(CH 2 ) 11 -C≡C-C≡C-(CH 2 ) 8 -COOH] in the dichloromethane solution, stirred (300 rpm) at room temperature and reacted for 1 hour to obtain a mixed solution;

[0058] 2) Add the mixed solution obtained in step 1) dropwise to 10 mL of 4 mmol / L ethylenediamine in dichloromethane solution within 20 minutes, and continue stirring (300 rpm) for 1 hour of reaction;

[0059] 3) The reaction solution obtained in step 2) was diluted with 20mL petroleum e...

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Abstract

The invention relates to the field of organic functional material preparation, in particular to a preparation method of thermochromism sensing materials. The thermochromism sensing materials are prepared from dimethyl silicone polymer and polydiacetylene type compounds. The thermochromism sensing materials of the invention have the blue color at the room temperature, the color is gradually changed from blue to purple along with the rasing of the temperature from the room temperature, the temperature is continuously raised to 80 DEG C, and the color of the thermochromism sensing materials is gradually changed from purple to red. When the temperature is gradually reduced from a high temperature (not higher than 95 DEG C), the color of the thermochromism sensing materials is gradually changed from red to blue or maintains unchanged according to different polydiacetylene type compounds. The preparation method of the thermochromism sensing materials of the invention has the advantages of easy preparation, low cost, convenient carrying, controllable shape and better elasticity of the obtained thermochromism sensing materials and the like. The invention can be widely applied to the fields of sensors, organic photoconducting devices and the like.

Description

technical field [0001] The invention belongs to the field of preparation of organic functional materials, and more specifically relates to a preparation method of thermochromic sensing materials. Background technique [0002] Thermochromic materials refer to compounds, mixtures that change color when the temperature changes, or thermochromic products made of them as color indicators. There are a large number of research results and products at home and abroad, which have been widely used in industrial temperature sensing, testing and alarm components; in medical treatment for temperature detection and control; in publishing and printing as color-changing inks and making anti-counterfeiting signs; in daily life It can be used in interior decoration, textile and clothing, daily necessities, children's products and toys, etc. [0003] The color of diacetylene compound monomer is generally white, and diacetylene can undergo polymerization reaction under ultraviolet light irradi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02C08F138/00C08L83/04
Inventor 刘涛张仁哲韩建华李少华江龙
Owner INST OF CHEM CHINESE ACAD OF SCI
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