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Method for adjusting and controlling surface wrinkling or wrinkle removing through oxidation-reduction environment

An environmental and anti-wrinkle technology, which is applied in the field of regulating polyaniline surface wrinkle patterns, can solve problems that are not involved in the intelligent interface, and achieve the effects of simple operability, reversible regulation, and good repeatability

Inactive Publication Date: 2016-01-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most redox-responsive materials are used in drug release, actuators, catalysts, etc., but have not been involved in the construction of smart interfaces.

Method used

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  • Method for adjusting and controlling surface wrinkling or wrinkle removing through oxidation-reduction environment
  • Method for adjusting and controlling surface wrinkling or wrinkle removing through oxidation-reduction environment
  • Method for adjusting and controlling surface wrinkling or wrinkle removing through oxidation-reduction environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of a wrinkled PANI film uniformly grown on the PDMS surface includes the following steps:

[0027] Step 1. Mix the PDMS prepolymer and cross-linking agent according to a certain mass ratio, pour it into a vessel, and stir it fully with a glass rod to obtain a uniform prepolymer;

[0028] Step 2. After degassing the prepolymer obtained in step 1 in a vacuum dryer for 1 hour, place it in a constant temperature blast drying oven at 70 degrees Celsius and heat it for 4 hours for curing to obtain a PDMS elastomer;

[0029] Step 3. Cut the PDMS elastomer obtained in step 2 into 3cm×1cm PDMS elastomer strip samples for later use;

[0030] Step 4, preparing 0.1M aniline hydrochloric acid solution and 0.1M ammonium persulfate hydrochloric acid solution respectively, respectively placing the aniline hydrochloric acid solution and ammonium persulfate hydrochloric acid solution at 0-5 degrees Celsius for 30 minutes;

[0031] Step 5. Quickly mix the two solutions pr...

Embodiment 2

[0033] A method for regulating surface wrinkling or wrinkling utilizing a redox environment is to place the PANI wrinkle film obtained in Example 1 in a 0.1M reducing sodium borohydride solution for 2 seconds and then take it out to obtain a PANI wrinkle appearance disappearance. Membrane, optical microscope picture as figure 2 shown. The above-mentioned wrinkle-free PANI film is placed in the oxidative hydrogen peroxide solution of mass fraction 15wt% and taken out after 1 minute, and the optical microscope picture of the wrinkled PANI film is obtained again as follows: figure 1 shown.

Embodiment 3

[0035] A method for regulating surface wrinkling or wrinkling utilizing a redox environment, the PANI wrinkle film obtained in Example 1 is placed in 0.1M oxidative potassium persulfate solution for 5 seconds and then taken out to obtain a PANI film whose wrinkle appearance disappears , an optical microscope picture such as image 3 shown. The above-mentioned non-wrinkled PANI film is placed in 1M hydrochloric acid solution and taken out after 1 minute, and the optical microscope picture of the wrinkled PANI film is obtained again. figure 1 shown.

[0036] In summary, the method of the present invention mainly grows wrinkled PANI film in situ on the PDMS substrate, and utilizes different redox environments to achieve reversible regulation of surface wrinkles. Because the PANI film is in different swelling and shrinking states in different environments, resulting in a reversible change in volume, and then realizes a reversible change in wrinkling / wrinkling of the pattern. Th...

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Abstract

The invention discloses a method for adjusting and controlling surface wrinkling or wrinkle removing through the oxidation-reduction environment. The swelling state of a PANI film on the PDMS surface is adjusted and controlled through the oxidation-reduction environment, and then the surface topography of the PANI film is adjusted and controlled. The method includes the steps that a PDMS elastomer long-strip sample with the wrinkled PANI thin film on the surface is placed in a sodium borohydride solution, wrinkles on the surface disappear, the sample without the wrinkles is placed in a hydrogen peroxide solution, and the wrinkles on the surface appear again. The PDMS long-strip sample with the wrinkled PANI film on the surface is placed in a strong-oxidizing-property potassium peroxodisulfate solution, the wrinkles can also disappear, then the sample without the wrinkles is immersed in a hydrochloric acid solution, and the wrinkles can reappear. According to the method, reversible adjusting and controlling over the wrinkle topography are achieved through a simple operation mode and a novel oxidation-reduction means, a new way is developed for intelligent responsiveness surface preparing, adjusting and controlling, and a new idea is provided for functional-response-interface constructing.

Description

technical field [0001] The invention relates to surface pattern preparation technology, in particular to a process method for regulating polyaniline surface wrinkle pattern. Background technique [0002] As a novel surface patterning technique, surface wrinkling of thin films due to interfacial stress relaxation has attracted great attention in recent years and has been widely used in flexible electrodes, sensors, optical devices, and physical property characterization of membrane materials. In specific application fields, such as interface bonding, wettability, optical properties and microfluidic channels, it is necessary to reversibly control the appearance and disappearance of wrinkles, thereby changing the interface bonding force, wettability, light transmission and Microfluidic channel switch. At present, the reversible control of surface wrinkling / wrinkling mainly focuses on mechanical means, and the steps are cumbersome. How to develop a simple, fast and effective w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/02C08J7/16C08G73/02C08L83/04
Inventor 鲁从华谢继勋
Owner TIANJIN UNIV
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