Method for constructing multi-stage morphology polypyrrole film based on in-situ wrinkling and stretch retraction

A technology of polypyrrole and film, which is applied in the field of constructing polypyrrole film with multi-level morphology based on in-situ wrinkling and stretching retraction, which can solve the problems of limited application range, limited application prospect, high cost, etc., and avoids the complexity of the preparation process , good repeatability, avoid the effect of operation steps

Inactive Publication Date: 2018-12-18
TIANJIN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PPy films prepared by traditional methods generally only have a secondary structure, which limits its application range. If a surface-patterned PPy film with a multi-level structure can be obtained, the specific surface area of ​​the PPy film can be effectively increased, which in turn can Expand its field of application
PPy thin films with multi-level structure can be prepared by template replication method, but due to the complex preparation process and high cost of the template method, its application prospects are severely limited.

Method used

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  • Method for constructing multi-stage morphology polypyrrole film based on in-situ wrinkling and stretch retraction
  • Method for constructing multi-stage morphology polypyrrole film based on in-situ wrinkling and stretch retraction

Examples

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Embodiment 1

[0019] Embodiment 1: Prepare polypyrrole (PPy) film, adopt the method for constructing the polypyrrole film with multi-level morphology based on in-situ wrinkling and stretching retraction, the steps are as follows:

[0020] Step 1: Mix the PDMS prepolymer and crosslinking agent according to the mass ratio of 10:1, pour it into a centrifuge tube, and stir with a glass rod to form a uniform mixture;

[0021] 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;

[0022] Step 3: The mixture of prepolymer and cross-linking agent poured into the petri dish was vacuum degassed for 30 minutes, then put into an oven, and heated and cured at 70°C for 4 hours to obtain a PDMS substrate;

[0023] Step 4: Place the above-mentioned PDMS substrate on a stretching table and pre-stretch 5%;

[0024] Step 5: Dissolving 0.2013g of pyrrole monomer in 30ml of hydrochloric a...

Embodiment 2

[0028] Embodiment 2: prepare PPy film, in embodiment 2, except that step 4 is different from the step in embodiment 1, other steps are all the same. In step 4, the degree of stretching is adjusted to 10%, and the obtained PPy film material is as follows figure 2 shown.

[0029] The present invention deposits a PPy film on a PDMS substrate by stretching and shrinking, and finally obtains a PPy film with a multi-level wrinkle structure through stress release. Free PPy films with different surface morphologies can be obtained by adjusting different stretching degrees. By controlling the degree of pre-stretching, PPy films with different surface morphologies can be obtained. The larger the stretching degree, the larger the obtained PPy film. The larger the period of the scale wrinkles. The method of the invention overcomes the previous shortcomings of complicated preparation process and poor process controllability.

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Abstract

The invention discloses a method for constructing a multi-stage morphology polypyrrole film based on in-situ wrinkling and stretch retraction. The method comprises the following steps: a PDMS substrate is prepared, the PDMS substrate is placed on a stretching table, prestretching is carried out to a certain extent, and the maximum is not more than 20%; a certain thickness of polypyrrole (PPy) filmis deposited on the surface of the stretched PDMS substrate, and finally the PDMS substrate is slowly retracted to an initial state to obtain the PPy film having a multi-stage wrinkle structure. In the present invention, the PPy film material having different surface topography can be obtained by adjusting the degree of stretching. The method utilizes a simple operation mode, the multi-level topography of a conductive polymer can be obtained, and the disadvantages of complicated operation, long preparation time, high cost, uneven pattern, small area and the like of a patterning method such aslithography can be avoided.

Description

technical field [0001] The present invention relates to the preparation of polymer film with multi-level wrinkle structure. Background technique [0002] Surface-patterned polypyrrole thin film materials have attracted widespread attention and are widely used in people's lives, such as superhydrophobic materials and flexible electronic devices. PPy films prepared by traditional methods generally only have a secondary structure, which limits its application range. If a surface-patterned PPy film with a multi-level structure can be obtained, the specific surface area of ​​the PPy film can be effectively increased, which in turn can Expand its field of application. PPy thin films with multi-level structure can be prepared by template replication method, but the complex preparation process and high cost of the template method severely limit its application prospects. In recent years, the method of inducing hierarchical structures by stretching and retraction has attracted wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L79/04C08G73/06
CPCC08G73/0611C08J5/18C08J2379/04
Inventor 鲁从华杨成枫
Owner TIANJIN UNIV
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