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Stretchable transparent conductive hydrogel and preparation method thereof

A conductive hydrogel, transparent and conductive technology, applied in the field of stretchable transparent conductive hydrogel and its preparation, can solve the problem of unsatisfactory conductivity, light transmittance and stretchability, affecting the electronic charge conduction performance, and electrical conductivity. The problem of discontinuous connection of components, etc., achieves the effect of being suitable for large-scale production, reducing production cost, and simple preparation method

Inactive Publication Date: 2019-09-20
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the simultaneous migration of ions and electrons due to the addition of hydrogel, possible electrochemical reactions or water electrolysis will affect the electronic charge conduction performance.
Moreover, the preparation process of high-strength conductive gels by polymerizing conductive monomers into gel arrays is complicated, and the conductive components are not continuously connected and distributed unevenly.
These problems lead to unsatisfactory conductivity, light transmission and stretchability
At present, electrodes with good electrical conductivity, light transmission and stretchability are still facing great challenges

Method used

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  • Stretchable transparent conductive hydrogel and preparation method thereof
  • Stretchable transparent conductive hydrogel and preparation method thereof
  • Stretchable transparent conductive hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 3 mL of PEDOT:PSS, 1 mL of ethylene glycol and 8 mL of water in an airtight container, and o Freeze at C for 24 h, and then vacuum filter at room temperature to obtain the PEDOT:PSS pre-reaction solution. Add 0.904 g AAm monomer, 0.053 g sodium persulfate, 0.034 g N,N - Methylenebisacrylamide and 0.035g TEMED, shake evenly, quickly inject into a 20*80*0.3 mm glass mold, and keep the temperature in a drying oven at 90 o C for 2 hours. After taking it out, the conductive hydrogel was separated from the mold, then immersed in 0.4 M sulfuric acid solution, soaked for 24 hours and then dried naturally to obtain a stretchable transparent conductive hydrogel.

[0025] The conductive hydrogel prepared in this example presents a porous microscopic morphology that is conducive to charge transport, such as figure 1 , excellent electrical conductivity, and its light transmittance reaches 65%, such as figure 2 ; There is no obvious decline in performance after being stretc...

Embodiment 2

[0027] Mix 3 mL of PEDOT:PSS, 1 mL of ethylene glycol and 8 mL of water in a volume ratio of 3:1:8 in an airtight container. o Freeze at C for 24 h, and then vacuum filter at room temperature to obtain the PEDOT:PSS pre-reaction solution. Add 0.904 g AAm monomer, 0.053 g sodium persulfate, 0.035 g N,N - Methylenebisacrylamide and 0.018 g TEMED, shake evenly, quickly inject into a 20*80*0.3 mm glass mold, and keep the temperature in a drying oven at 90 o C for 2 hours. After taking it out, the conductive hydrogel was separated from the mold, then immersed in 0.5 M hydrochloric acid solution, soaked for 12 hours, and then dried naturally to obtain a stretchable transparent conductive hydrogel.

[0028] The electrochemical performance of the flexible supercapacitor prepared in this example is similar to that in Example 1, and its stretchability is good, and its performance has no obvious decline after being stretched to twice its original length.

Embodiment 3

[0030] Mix 3 mL of PEDOT:PSS, 1 mL of ethylene glycol and 8 mL of water in a volume ratio of 3:1:8 in an airtight container. o Freeze at C for 24 h, and then vacuum filter at room temperature to obtain the PEDOT:PSS pre-reaction solution. Add 1.808 g AAm monomer, 0.053 g sodium persulfate, 0.034 g N,N - Methylenebisacrylamide and 0.034 g TEMED, shake evenly, quickly inject into a 20*80*0.3 mm glass mold, and keep the temperature in a drying oven at 90 o C for 2 hours. After taking it out, the conductive hydrogel was separated from the mold, then immersed in 0.4 M sulfuric acid solution, soaked for 12 hours and then dried naturally to obtain a stretchable transparent conductive hydrogel.

[0031] The electrochemical performance of the flexible supercapacitor prepared in this example is similar to that in Example 1, and its stretchability is good, and its performance has no obvious decline after being stretched to twice its original length.

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Abstract

The invention discloses stretchable transparent conductive hydrogel and a preparation method thereof. The conductive hydrogel structure is formed by coating a conductive polymer with a cross-linked polymer network. The cross-linked polymer network can be polyacrylamide (PAAm) or polyacrylic acid (PAA); the conductive polymer is poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS). The hydrogel is prepared by a three-step synthesis method, which comprises the following steps: 1) freezing a mixed solution of PEDOT:PSS and ethylene glycol to obtain a PEDOT:PSS pre-reaction solution; 2) adding a cross-linked polymer network monomer, an initiator, a catalyst and an accelerator into the pre-reaction solution, and then carrying out thermal polymerization; and 3) finally, soaking the thermal polymerization product in a sulfuric acid solution to obtain the stretchable transparent conductive hydrogel. The preparation method can obtain the conductive hydrogel with excellent comprehensive performance, and the specific performance is high conductivity, high light transmittance, good stretchability, smooth surface, adjustable shape and thickness and the like.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and in particular relates to a stretchable transparent conductive hydrogel and a preparation method thereof. Background technique [0002] With the development of science and technology, people have more and more application requirements for electronic products, especially the requirements for flexibility, stretchability and wearability. An emerging material—conductive gel has been widely used. Conductive gel has the advantages of unique flexibility / extensibility, electrical conductivity, and low-cost manufacturing process. However, the main way to synthesize conductive gels is to combine conductive polymers with traditional insulating hydrogels. However, due to the simultaneous migration of ions and electrons due to the addition of hydrogel, the possible electrochemical reactions or water electrolysis will affect the electronic charge conduction performance. Moreover, the prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L33/26C08L33/02C08L65/00C08L25/18C08F220/56C08F222/38C08F220/06
CPCC08F220/06C08F220/56C08J3/075C08J2333/02C08J2333/26C08J2425/18C08J2465/00C08F222/385
Inventor 赖文勇吴幼薇程涛黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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