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A polydiacetylene-based thermally reversible color-reversing composite material and its preparation method

A technology of composite materials and diacetylene, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems that the color cannot be restored from red to blue state, and affect the reusability of polydiacetylene sensors, etc. control effect

Active Publication Date: 2020-06-16
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polydiacetylene exhibits only an irreversible color change when the environment changes, that is, its color cannot return from red to blue state when the external stimulus is removed
This irreversible discoloration behavior affects the reusability of polydiacetylene sensors

Method used

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  • A polydiacetylene-based thermally reversible color-reversing composite material and its preparation method
  • A polydiacetylene-based thermally reversible color-reversing composite material and its preparation method
  • A polydiacetylene-based thermally reversible color-reversing composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the preparation of polydiacetylene / hydroxy aluminum oxide composite material

[0022] (1) Preparation of hydroxylated aluminum oxide: Weigh 3 g of aluminum oxide and add to 30 ml H 2 o 2 / H 2 O mixed solution (H 2 o 2 :H 2 O=1:2~1:3v / v), add sodium silicate to adjust the pH of the solution to 10, react at 50°C for 5~7 h, filter, and wash the solid with deionized water several times until the eluate is neutral properties, vacuum drying, that is, hydroxylated aluminum oxide; the infrared spectrum of hydroxylated aluminum oxide and unhydroxylated aluminum oxide is shown in figure 1 .

[0023] (2) Preparation of polydiacetylene / hydroxylated aluminum oxide composite material: Weigh 12 g of 10,12-pentacosadiynoic acid monomer, add it into 1 mL of dimethyl sulfoxide and stir to fully dissolve it Finally, add 9 mL of deionized water, ultrasonically disperse for 10 min, add the above deionized aqueous solution of 3 mg of hydroxylated aluminum oxide, mix and...

Embodiment 2

[0025] Embodiment 2, preparation of polydiacetylene / hydroxylated titanium dioxide composite material

[0026] (1) Preparation of hydroxylated aluminum oxide: Weigh 3 g titanium dioxide particles, add to 30 ml H 2 o 2 / H 2 O mixed solution (H 2 o 2 :H 2 O=1:2~1:3v / v), add sodium silicate to adjust the pH of the solution to 10, react at 50°C for 5~7 h, filter, and wash the solid with deionized water several times until the eluate is neutral properties, and dried in vacuum to obtain hydroxylated titanium dioxide; the infrared spectra of hydroxylated titanium dioxide and unhydroxylated titanium dioxide are shown in figure 1 .

[0027] (2) Preparation of polydiacetylene / hydroxylated titanium dioxide composite material: Weigh 12 g of 10,12-pentacosadiynoic acid monomer, add it into 1 mL of dimethyl sulfoxide and stir to fully dissolve it, then add 9 mL deionized water, after ultrasonic dispersion for 10min, add the above deionized aqueous solution of 3 mg hydroxylated titani...

Embodiment 3

[0029] Embodiment 3, preparation of polydiacetylene / hydroxylated silica composite material

[0030] (1) Preparation of hydroxylated silica: Weigh 3 g of silica particles, add to 30 ml H 2 o 2 / H 2 O mixed solution (H 2 o 2 :H 2 O=1:2~1:3v / v), add sodium silicate to adjust the pH of the solution to 10, react at 50°C for 5~7 h, filter, and wash the solid with deionized water several times until the eluate is neutral properties, and dried in vacuum to obtain hydroxylated silicon dioxide; the infrared spectra of hydroxylated silicon dioxide and unhydroxylated silicon dioxide are shown in figure 1 .

[0031] (2) Preparation of polydiacetylene / hydroxylated silica composite material: Weigh 12 g of 10,12-pentacosadiynoic acid monomer, add 1 mL of dimethyl sulfoxide and stir to fully dissolve, then add 9 mL deionized water, after ultrasonic dispersion for 10 min, add the above deionized aqueous solution of 3 mg hydroxylated silicon dioxide, mix and ultrasonically shake at 75~80...

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Abstract

The invention discloses a polydiacetylene-based thermotropic reversible color-change composite material which is prepared by the following steps: sufficiently dissolving a 10,12-pentdiacetylenic acidmonomer into a dimethyl sulfoxide-water mixed solution, further adding a surface hydroxylation inorganic oxide, performing ultrasonic treatment for 50-60 minutes on the mixed solution at 70-80 DEG C,cooling to 0-5 DEG C, leaving to stand to carry out self-assembled incubation so as to obtain a colorless supermolecule solution, and polymerizing the colorless supermolecule solution under radiationof ultraviolet rays, thereby obtaining a polydiacetylene / hydroxylation oxide blue solution. According to the material, surface polyhydric inorganic particles are prepared and reacted with hydrogen bonds of -COOH at a diacetylene acid molecule end group, and after self-assembling and ultraviolet ray radiation polymerization, a universal thermotropic reversible color-change composite material of a polydiacetylene / hydroxylation inorganic matter system can be prepared. Since different polydiacetylene / hydroxylation inorganic matter composite materials have different thermotropic color-change temperatures, temperature controllability of a reversible color-change sensor can be achieved.

Description

technical field [0001] The invention relates to a thermochromic intelligent material, in particular to a preparation method of a polydiacetylene-based thermally reversible discoloration composite material, which belongs to the field of composite materials and intelligent materials. Background technique [0002] Materials are the backbone of human life and production, which are mainly divided into functional materials and structural materials. Functional materials focus on their special functions, while structural materials focus on their mechanical strength. Smart materials are the combination of functional materials and structural materials, and finally realize functional intelligence and structural intelligence. It can obtain changes in the external environment through its own perception, make timely judgments and processes based on the changes, issue instructions, adjust its own state and behavior to adapt to changes in the external environment, and then realize self-det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F138/00C08F2/44C08F2/48C08K9/02C08K3/22C09K9/02
CPCC08F2/44C08F2/48C08F138/00C08K3/22C08K3/36C08K9/02C08K2003/2227C08K2003/2241C09K9/02
Inventor 常玥张亚娜王俊林李小妹李梦佳
Owner NORTHWEST NORMAL UNIVERSITY
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