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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 unfavorable detection, complicated operation, inconvenient carrying, etc., and achieve the effect of low cost and simple preparation

Inactive Publication Date: 2010-09-08
INST OF CHEM CHINESE ACAD OF SCI
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  • 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

[0035] Preparation of polydimethylsiloxane / glutamic acid-based polydiacetylene thermally induced reversible color solid-state sensing material

[0036] (1) Synthesis of glutamate-diacetylene molecule

[0037] Reference (Cheng Quan et al., Langmuir, 2000, Vol. 16, p. 5334, Langmuir, 1998, Vol. 14, p. 1974) for the synthesis of glutamate-based diacetylene molecules, the specific method includes the following steps:

[0038] 1) Add 0.34g 10,12-Twenty-pentadecyethynoic acid [CH 3 -(CH 2 ) 11 -C≡C-C≡C-(CH 2 ) 8 -COOH] was dissolved in 20mL of dichloromethane, and then 0.14g of N-hydroxysuccinimide, 0.23g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride were added in sequence, The reaction was stirred at room temperature (300 revolutions / min) for 12 hours. The mixed solution was concentrated on a rotary evaporator, and then 20 mL of ethyl acetate was added and extracted with water. The obtained organic phase uses anhydrous Na 2 SO 4 Dry for 12 hours and evaporate to dryness...

Embodiment 2

[0047] Preparation of Thermochromic Solid State Sensing Material of Polydimethylsiloxane / Dipentanoylic Acid Polydiacetylene

[0048] 1) Dissolve pentadecynoic acid diacetylene in chloroform to obtain a 1 mM solution; take 2.14 mL of the above solution, mix 1.5 g polydimethylsiloxane, and 0.1 g curing agent to obtain a mixture solution, and then remove the mixture under reduced pressure After the chloroform in the solution, the mixture is cured at 30°C for 24 hours, and the cured product is irradiated under a 254nm ultraviolet lamp for 5 seconds to polymerize the polydiacetylene of pentadecynoic acid to form a blue color. The thermochromic solid-state sensing material;

[0049] 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 to red during the heating process, and the color remains red during ...

Embodiment 3

[0051] Preparation of polydimethylsiloxane / glutamic acid-based polydiacetylene thermally induced reversible color liquid sensing material

[0052] (1) Synthesis of aminodiacetylene molecules

[0053] References (Richard E. Bruehl et al., Biochemistry, 2001, Vol. 40, page 5964) in the synthesis of aminodiacetylene molecules, the specific method includes the following steps:

[0054] 1) Put 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-pentadecyldiynoic acid [CH 3 -(CH 2 ) 11 -C≡C-C≡C-(CH 2 ) 8 -COOH] in dichloromethane solution, stirring (300 revolutions / min) at room temperature for 1 hour to obtain a mixed solution;

[0055] 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 to stir (300 revolutions / min) for 1 hour;

[0056] 3) Dilute and filter the reaction solution obtained in step 2) with 20 mL of petroleum ether, and evaporate th...

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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, or thermochromic products made with them as color change indicators that change color when the temperature changes. There have been a large number of research results and products at home and abroad, which have been widely used in industry to sense temperature, test and alarm components; used for detection and temperature control in medical treatment; used as color-changing ink and making anti-counterfeiting signs in publishing and printing; It can be used for interior decoration, textile and clothing, daily necessities, children's products and toys. [0003] The color of diacetylene compound monomers is generally white, and diacetylene can undergo polymerization reaction under ultraviolet light irradiatio...

Claims

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Application Information

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Patent Type & Authority Applications(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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