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Azobenzene polymer film and preparation method and application thereof

A polymer film and azobenzene technology, which is applied in the field of azobenzene polymer film and its preparation, can solve the problems of poor stability and photoresponse of the composite, affecting the photoresponse performance of the composite material, and poor dispersion of azobenzene. Achieve good photoresponse effect, improve photoresponse performance, and enhance dispersion

Active Publication Date: 2021-01-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method is to directly dope azobenzene in the polymer. Although it is simple and easy to implement, azobenzene is prone to agglomeration in the polymer, so the stability and photoresponsiveness of the obtained complex are poor.
The second way is that azobenzene is grafted on the polymer through covalent bonds. This type of method generally involves relatively complicated synthetic reactions, and there are still problems of poor dispersion and poor stability of azobenzene in the polymer. Seriously affect the photoresponse properties of composite materials

Method used

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  • Azobenzene polymer film and preparation method and application thereof
  • Azobenzene polymer film and preparation method and application thereof
  • Azobenzene polymer film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Ultrasonic dispersion of 4-amino-3-sulfonate sodium-4'-sulfonate azobenzene and graphene oxide in sodium hydroxide solution, polydimethyldiallylammonium chloride (PDAC) and polyvinyl alcohol were ultrasonically dispersed in deionized water, and the ultrasonic dispersion time was 3 hours. The concentration of azobenzene in the dispersion was 20 mg / mL, the concentration of PDAC in the dispersion was 10 mg / mL, and graphene oxide The concentration in the dispersion liquid is 1 mg / mL, and the concentration of polyvinyl alcohol in the dispersion liquid is 20 mg / mL.

[0048] (2) Measure 1 milliliter of graphene oxide dispersion, add 9 milliliters of deionized water to ultrasonically dilute for 20 minutes and mix evenly; measure 30 milliliters of PDAC dispersion, drop the PDAC dispersion into the graphene oxide dispersion , and reacted for 12 hours under the action of magnetic stirring to prepare a mixed solution of PDAC / graphene oxide complex.

[0049] (3) Measure 10 ml o...

Embodiment 2

[0054] The azobenzene polymer thin film prepared in Example 1 was tested for optical driveability. Place the azobenzene polymer film at a distance of 10 cm from the short-arc xenon lamp light source, and adjust the position so that the film is at the center of the light source. Set the power of the short-arc xenon lamp to 300 watts, the wavelength to 400 nanometers, and the irradiation time to 3 minutes. Use a camera to record the changes in the film during light irradiation. The results are as follows: Figure 4 shown. The experimental results show that the azobenzene polymer film prepared in Example 1 deforms slowly under light, and the deformation angle of the film after 3 minutes of irradiation is 22°, indicating that the azobenzene polymer film prepared in the embodiment of the present application has Good photoresponsiveness, can deform under light conditions.

Embodiment 3

[0056] The azobenzene polymer film prepared in Example 1 was tested for repeatability of light-driven deformation, and the test results were as follows: Figure 5 shown. The experimental results show that the azobenzene polymer film prepared in Example 1 can deform at a large angle after each light irradiation, and it still has deformation ability after 15 cycles of light irradiation, which shows that the azobenzene polymer film prepared in the embodiment of the present application Thin-film light-driven stability is good.

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Abstract

The invention belongs to the technical field of high polymer materials. The invention provides an azobenzene polymer film and a preparation method and application thereof. The cationic polymer is assembled on the carbon nanomaterial through electrostatic force, azobenzene is combined with the cationic polymer through electrostatic interaction, the three components are tightly connected to form a polymer with a stable structure, and the film-forming property of the azobenzene polymer film is enhanced by adding the film-forming material. The azobenzene polymer film has excellent photosensitivity, elasticity and plasticity, can deform under the illumination condition, and is expected to be used in the field of shape memory materials or intelligent driving materials. The preparation method issimple to operate, agglomeration of the components can be effectively avoided, the mixing uniformity of the components is improved, and the photoresponse performance is improved.

Description

technical field [0001] The application belongs to the technical field of polymer materials, and in particular relates to an azobenzene polymer film and its preparation method and application. Background technique [0002] Azobenzene can change its molecular configuration under stimuli such as light, heating and static electricity, which is accompanied by changes in molecular length, polarity, energy and photophysical properties. These excellent properties have made it widely studied, but the processability is too small. Poor shortcomings limit its application. Therefore, azobenzene often acts as a functional molecule, and is complexed with polymers in different ways. The first way is to directly dope azobenzene in the polymer. Although it is simple and easy to do, azobenzene is prone to agglomeration in the polymer, so the stability and photoresponsiveness of the prepared composite are poor. The second way is that azobenzene is grafted on the polymer through covalent bonds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L39/00C08L39/02C08L33/14C08L9/04C08L29/04C08L77/00C08L1/12C08K3/04C08K5/23C08J5/18
CPCC08J5/18C08J2339/00C08J2339/02C08J2333/14C08J2309/04C08J2429/04C08J2477/00C08J2401/12C08K3/042C08K5/23
Inventor 戴家杰罗文何拯周柏均黄金
Owner GUANGDONG UNIV OF TECH