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Method for preparing flexible two-dimensional polyaniline film by utilizing gas diffusion

A technology of polyaniline film and gas diffusion, which is applied in the direction of instruments, analytical materials, measuring devices, etc., can solve the problems of slow response-recovery time, cumbersome follow-up processing, and low detection limit, and achieve uniform appearance, low cost, and post-processing Handle simple effects

Active Publication Date: 2020-08-14
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the polyaniline film prepared by the existing method, the operation is more complicated, the follow-up treatment is more loaded down with trivial details, and the response to ammonia in room temperature environment Low, slow response-recovery time, and low detection limit, it provides a method for preparing flexible two-dimensional polyaniline films by gas diffusion

Method used

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  • Method for preparing flexible two-dimensional polyaniline film by utilizing gas diffusion
  • Method for preparing flexible two-dimensional polyaniline film by utilizing gas diffusion
  • Method for preparing flexible two-dimensional polyaniline film by utilizing gas diffusion

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specific Embodiment approach 1

[0024] Embodiment 1: In this embodiment, a method for preparing a flexible two-dimensional polyaniline film by gas diffusion is carried out according to the following steps:

[0025] 1. Mix ammonium persulfate with hydrochloric acid with a concentration of 0.1mol / L to 1mol / L, and stir magnetically for 20min to 45min to obtain ammonium persulfate solution;

[0026] The quality of described ammonium persulfate and concentration are that the volume ratio of the hydrochloric acid of 0.1mol / L~1mol / L is 1g:(0.67~2)L;

[0027] 2. Place the ammonium persulfate solution in an open container, place the aniline liquid in another open container, and then place the container containing the ammonium persulfate solution and the container containing the aniline liquid in the same closed space, Under the condition of a temperature of 1 DEG C to 10 DEG C, the gas diffusion reaction takes 1 to 10 days to obtain a flexible two-dimensional polyaniline film on the surface of the ammonium persulfate...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass ratio of the volume of the aniline liquid described in step 2 to the ammonium persulfate described in step 1 is (10-30) mL:1 g. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the volume of the enclosed space described in step 2 is 1L-40L. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a flexible two-dimensional polyaniline film by utilizing gas diffusion, relates to a method for preparing a polyaniline film, and aims to solve the problems of complex operation, tedious subsequent treatment, low response to ammonia gas in a room temperature environment, slow response-recovery time and high detection limit of the polyaniline film prepared by the existing method. The preparation method comprises the following steps: 1, mixing ammonium persulfate with hydrochloric acid, and magnetically stirring to obtain an ammonium persulfate solution; and 2, putting the ammonium persulfate solution into an open container, putting aniline liquid into another open container, then putting the container filled with the ammonium persulfate solution and the container filled with the aniline liquid into the same closed space, and carrying out gas diffusion reaction to obtain the flexible two-dimensional polyaniline film on the surface of the ammonium persulfate solution. The method is used for preparing the flexible two-dimensional polyaniline film through gas diffusion.

Description

technical field [0001] The invention relates to a method for preparing polyaniline film. Background technique [0002] In recent years, gas sensors have been widely used in environmental monitoring, medical diagnosis and other fields. Traditional gas sensors are materials coated on ceramic tubes or ceramic plates, which do not have the advantages of flexibility and toughness. Moreover, the working temperature of traditional sensors is generally high temperature, which virtually increases energy consumption and safety issues. To solve these problems, scientists have developed wearable flexible sensors, which have the advantages of optical transparency, flexibility, and lightness. It is expected to be one of the more active areas of research in the coming years. At present, carbon nanotubes, graphene, organic polymer materials, etc. have been used in wearable gas sensors. Due to the advantages of good electrical conductivity, low cost and easy processing, organic polymer m...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08J5/18C08L79/02G01N27/12
CPCC08G73/0266C08J5/18G01N27/126C08J2379/02Y02A50/20
Inventor 程晓丽朱崇绘徐英明霍丽华张现发
Owner HEILONGJIANG UNIV
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