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A light-driven flexible film based on salicylaldehyde Schiff base, its preparation method and application

An aldehyde Schiff base and light-driven technology, applied in the field of organic chemistry, can solve problems such as high cost, complex synthesis process, and lack of liquid crystal properties, and achieve the effect of simple preparation, simple and cheap preparation method, and good effect

Active Publication Date: 2021-05-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of light-driven actuators, although researchers have adopted many methods to improve the fabrication and sensitivity of flexible liquid crystal composite actuators, such as using 3D printing technology to achieve a variety of shapes, or using laser direct writing technology to control micro-execution Its motion behavior, etc., but these methods usually bring high-cost device fabrication and complex synthesis process, and the demand for light-driven deformation by using cheap and easy-to-prepare polymer materials that do not have liquid crystal properties is increasing day by day

Method used

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  • A light-driven flexible film based on salicylaldehyde Schiff base, its preparation method and application
  • A light-driven flexible film based on salicylaldehyde Schiff base, its preparation method and application
  • A light-driven flexible film based on salicylaldehyde Schiff base, its preparation method and application

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Experimental program
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Embodiment 1

[0038] Preparation of salicylaldehyde Schiff base molecule: Under nitrogen protection, dissolve compounds 1, 2 and anhydrous magnesium sulfate in an equivalent ratio of 1:1:2 in absolute ethanol, stir and react at room temperature for 2 hours, then remove by suction filtration Anhydrous magnesium sulfate, and washed with an appropriate amount of absolute ethanol until the anhydrous magnesium sulfate is white, the product is recrystallized with petroleum ether / n-hexane, and vacuum-dried to obtain the product (I), wherein compound 1 is 2 for Product (I) is

[0039] (I)

Embodiment 2

[0042] Step 1: Prepare a mixed solution based on salicylaldehyde Schiff base molecules and flexible polymers

[0043] Salicylaldehyde Schiff base molecule And flexible polymer polyethylene phthalate (PET), the average molecular weight of its polymer PET is 2~3×10 4 , The ratio of weight average to number average molecular weight is 1.5-1.8. The two were weighed at a mass ratio of 1:15, and a mixed solution was prepared according to the ratio of the mixture and the toluene solution at a ratio of 60 mg / mL, and stirred and dissolved at 45°C.

[0044] Step 2: Preparation of Optically Actuated Flexible Film

[0045] The glass substrate is ultrasonically cleaned with dichloromethane and toluene solution to ensure that it is clean and ready for use. Spin-coat PEDOT:PSS glass substrate with a thickness of about 100-300nm on the surface of the glass substrate as a sacrificial layer. After the spin coating is completed, the surface layer has PEDOT:PSS The glass substrate was anneale...

Embodiment 3

[0051] Step 1: Prepare a mixed solution based on salicylaldehyde Schiff base molecules and flexible polymers

[0052] Using the Salicylaldehyde Schiff Base Molecule Weigh it with polymer PET at a mass ratio of 1:8, prepare an initial solution according to the mixture and toluene solution at a ratio of 65mg / mL, stir and dissolve at 50°C, and the rest is the same as step 1 of Example 1.

[0053] Step 2: Preparation of Optically Actuated Flexible Film

[0054] The glass substrate is ultrasonically cleaned with dichloromethane and toluene solution to ensure that it is clean and ready for use. Spin-coat 10mg / mL sodium carboxymethylcellulose with a thickness of about 100-300nm on the glass substrate as a sacrificial layer on the glass substrate. Spin-coating is completed Finally, the glass substrate with sodium carboxymethyl cellulose on the surface is placed on a hot stage at 150° C. for annealing treatment. Then place the surface-treated glass substrate on a hot stage at 45°C, ...

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Abstract

The invention belongs to the field of organic chemistry, and specifically relates to a light-driven flexible film based on salicylaldehyde Schiff base, its preparation method and application. The light-driven flexible film is composed of a salicylaldehyde Schiff base-doped flexible polymer material. The light-driven flexible film of the present invention is composed of cheap and easy-to-obtain flexible polymer materials doped with salicylaldehyde Schiff base molecules. The light-driven flexible film has good light-driven sensitivity and is successfully applied to light-driven arms and light-driven butterfly wings. And light-driven switches, provide a certain reference for the application of light-driven actuators in bionic devices. The preparation method of the present invention combines the photosensitive small molecule salicylaldehyde Schiff base with the flexible polymer by simple doping, and coats the substrate with a sacrificial layer on the surface with hot mixed liquid droplets to prepare a compound with good photoresponsiveness. The light-driven flexible film material of the present invention has the characteristics of flat surface, simple and cheap preparation method, and large-scale production.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and specifically relates to a light-driven flexible film based on salicylaldehyde Schiff base, its preparation method and application. Background technique [0002] Stimulus-responsive materials are a type of smart materials, which are materials that feel stimuli and whose specific physical or chemical properties respond to directional changes. Among these smart polymer materials, photosensitive polymers are particularly suitable for constructing soft actuators, because light is a clean light source that enables non-contact precise control of materials, enabling subtle movements of photosensitive actuators. A variety of functions. In particular, the complexes of azo-based photosensitive molecules with liquid crystal (LC) polymers exhibit unique properties such as elasticity, anisotropy, stimuli responsiveness, and molecular synergy. In response to external stimuli, the macromolecules rearrange,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K5/29C08J5/18
CPCC08J5/18C08J2367/02C08K5/29
Inventor 李倩倩黄阿瑞胡洁李振
Owner WUHAN UNIV
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