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Method for preparing conductive polyaniline hydrogel based on composite oxidant

A technology of conductive polyaniline and composite oxidant, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of low yield, low conductivity and yield, and less products, and achieve the expansion of application range, The effect of improving specific capacitance and good stretchability

Pending Publication Date: 2020-08-07
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that among these oxidants, APS is the most widely used, and the yield and conductivity of PANI synthesized by APS as an oxidant are higher, but its conductivity is not the best; K 2 Cr 2 o 7 and KIO 3 Although the conductivity is good when used as an oxidant, its yield is low; FeCl 3 It is both an oxidizing agent and a dopant. The doped PANI has high electrical conductivity, good environmental stability and mechanical properties, but there are few products; the oxidizing agent is H 2 o 2 , the conductivity and yield are both low

Method used

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  • Method for preparing conductive polyaniline hydrogel based on composite oxidant
  • Method for preparing conductive polyaniline hydrogel based on composite oxidant
  • Method for preparing conductive polyaniline hydrogel based on composite oxidant

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: the preparation method of PANI hydrogel

[0024] (1) Dissolve 4g of PVA-1750 (PVA-1750) in 16g of deionized water to prepare a PVA aqueous solution, stir and heat at 90°C until the PVA is completely dissolved.

[0025] (2) Dissolve 0.06 mmol (10.4 mg) of m-aminophenyl borate hydrochloride in 167 μL of concentrated hydrochloric acid, add to the solution of (1), and stir.

[0026] (3) After being dissolved, 1.2 mmol aniline (109 μL) was added to the solution in (2) above to obtain solution A;

[0027] (4) 1.26mmol APS (288mg) and 1.74mmol FeCl 3 (468 mg) was dissolved in 500 μL of water to obtain solution B.

[0028] (5) Put solutions A and B in an ice bath, then add solution B to solution A, stir well, pour it into a mold, let it react at 0°C for 6 hours, and form a conductive hydrogel PANI hydrogel glue.

[0029] (6) Soak the PANI hydrogel in deionized water and wash it several times.

[0030] In this preferred system, the concentration of PVA is 5wt%...

Embodiment 2

[0031] Embodiment 2: the preparation of PANI hydrogel supercapacitor electrode

[0032] (1) Configure 6M HNO 3 , cut the carbon cloth into 1*1cm size, put it in 6M HNO 3 Medium, acidified for 24h.

[0033] (2) Weigh the acidified carbon cloth and record it.

[0034](3) Drop the PANI hydrogel on the acidified carbon cloth, let it grow at 0°C for 6 hours, weigh the mass again, subtract the previous mass from the latter mass to obtain the mass of the PANI hydrogel, Test samples of PANI hydrogels are available.

Embodiment 3

[0035] Embodiment 3: PANI hydrogel morphology characterization

[0036] Freeze-dry 4 kinds of PANI hydrogels prepared in different proportions for 12 hours. The obtained samples have no moisture. Take a piece of each cross-section and stick it on the conductive adhesive, spray gold, and carry out SEM test. The obtained results are as follows: figure 2 .

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Abstract

The invention provides a method for preparing conductive polyaniline hydrogel based on a composite oxidant. The method comprises the following steps: heating an aqueous solution containing PVA to obtain a PVA aqueous solution; mixing 3-aminophenylboronic acid hydrochloride with a PVA aqueous solution to obtain an initial solution; mixing aniline with the initial solution, and then mixing with twooxidant aqueous solutions for reaction to obtain the conductive hydrogel. The material provided by the invention has good mechanical properties and high electrochemical activity, can be assembled intoan all-solid-state supercapacitor, and has good stretchability, energy storage performance and cycling stability. Meanwhile, based on the technology provided by the invention, other materials with good electrical activity, such as carbon materials, nano metal particles and the like, can also be added into the PANI-based hydrogel, so that the properties such as specific capacitance and the like ofthe flexible electrode are improved, and the application range of the flexible electrode is expanded.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing conductive polyaniline hydrogel based on a composite oxidant. Background technique [0002] Polyaniline (PANI) is a typical conductive polymer, which has received widespread attention and rapid development because of its non-toxic, readily available raw materials, diverse structures, simple preparation, good environmental stability, and good electrical conductivity. PANI has special optical and electrical properties, especially PANI has the characteristics of reversible doping-dedoping and adjustable conductivity, which makes PANI applicable to sensor materials, electromagnetic shielding materials and energy storage materials. However, the main chain of PANI has a large number of benzene rings and quinone rings, which are relatively rigid and have strong π-π stacking interactions between chains, making PANI insoluble and difficult to process, which greatly ...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L79/02C08L29/04C08K3/16H01G11/44H01G11/86
CPCC08J3/075C08J3/24H01G11/44H01G11/86C08J2379/02C08J2429/04C08K3/16Y02E60/13
Inventor 邱碧薇王竟赟黄锡迎何自豪
Owner UNIV OF SHANGHAI FOR SCI & TECH
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