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Method for achieving azo polymer film surface patterning through laser

A polymer film and surface patterning technology, applied in the direction of coating, etc., can solve the problems of high energy consumption and large pollution, achieve good repeatability, and avoid the effect of complicated preparation process

Inactive Publication Date: 2019-01-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surface patterning technology can be divided into bottom-up methods and top-down methods. Traditional top-down methods such as photolithography have disadvantages such as high energy consumption and large pollution.

Method used

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  • Method for achieving azo polymer film surface patterning through laser
  • Method for achieving azo polymer film surface patterning through laser
  • Method for achieving azo polymer film surface patterning through laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of method that realizes the surface patterning of azo polymer film by laser, comprises the following steps:

[0021] Step 1: After mixing the PDMS prepolymer and the crosslinking agent according to the mass ratio of 30:1, pour it into a centrifuge tube, and stir it with a glass rod to form a uniform mixture;

[0022] Step 2: vacuum degas the mixture of PDMS prepolymer and cross-linking agent for 1 hour, then pour it into a square petri dish, and make it evenly distributed in the petri dish;

[0023] Step 3: Vacuum degas the mixture of prepolymer and crosslinking agent poured into the petri dish for 30 minutes, then put it into an oven, and heat and cure at 70 degrees Celsius for 4 hours;

[0024] Step 4: First, ultrasonically clean the glass slides successively with distilled water and absolute ethanol, then place them in a mixed solution of hydrogen peroxide / ammonia / deionized water (volume ratio 1:1:5) and heat at 70°C for 10 minutes, and finally u...

Embodiment 2

[0028] Embodiment 2: A method for patterning the surface of an azo polymer film by laser. In Embodiment 2, only the light treatment time is adjusted to 20s in step seven, and other steps remain unchanged. This process was observed in situ under a stereo microscope, and the patterns produced on the surface of the film were as follows: figure 2 shown.

Embodiment 3

[0029] Embodiment 3: a kind of method that realizes the surface patterning of azo polymer film by laser, in embodiment 3, just in step one, the mass ratio of prepolymer and crosslinking agent is adjusted to 10:1, in step seven Adjust the light processing time to 2min, and keep other steps unchanged. This process was observed in situ under a stereo microscope, and the patterns produced on the surface of the film were as follows: image 3 shown.

[0030] To sum up, the present invention achieves surface patterning of the side-chain azobenzene polymer film by adjusting the modulus of the laser and the substrate, and obtains different surface patterns by adjusting the modulus of the substrate and the illumination time. When the base modulus is low and the illumination time is long, a surface pattern with a random center, a concentric circle in the middle, and a radial surface pattern on the outermost side is formed; when the illumination time is short, no random wrinkle pattern o...

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Abstract

The invention discloses a method for achieving azo polymer film surface patterning through laser. The method comprises: preparing a PDMS elastomer; preparing a 30 mg / mL polyaminoazobenzene / tetrahydrofuran solution and a polyethyleneimine / ethanol solution having a mass fraction of 3%; taking the polyethyleneimine / ethanol solutionr, and carrying out spin-coat to form a uniform film as a polymer middle layer on the surface of the PDMS elastomer; continuously taking the polyaminoazobenzene / tetrahydrofuran solution, and carrying out spin-coat to form a PAAB film so as to finally obtain a compositefilm coated with a uniform polyaminoazobenzene layer; and treating the surface of the film system by using 256 mw and 405 nm unpolarized light, and controlling the morphology of the pattern generatedon the surface by regulating the illumination time and the substrate modulus. According to the present invention, the pattern on the surface of the film-based system is adjusted by regulating the illumination time and the substrate modulus through the simple and rapid operation, such that the complicated and cumbersome operation steps, the long preparation time, the expensive equipment and the experiment consumable loss are avoided.

Description

technical field [0001] The invention relates to the technical field of realizing side chain azobenzene polymer film surface patterning. Background technique [0002] Surface patterning technology is a technology that regulates the properties of surface micro-regions by constructing microstructures on the surface. It plays an important role in the fields of physics, chemistry, optics, and microelectronics, and has shown strong potential and application value. Surface patterning techniques can be divided into bottom-up methods and top-down methods. Traditional top-down methods such as photolithography have disadvantages such as high energy consumption and large pollution. Azobenzene materials have been widely studied due to their unique photo-induced cis-trans isomerism. The present invention uses a side chain azobenzene polymer film to achieve the purpose of patterning the film surface by adjusting the laser and substrate modulus, and has achieved It can be a very good way t...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J7/12C08L83/04
CPCC08J7/042C08J7/123C08J2383/04C08J2479/00C08J2479/02
Inventor 鲁从华刘恩平
Owner TIANJIN UNIV
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