Preparation methods of high-water-stability conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) composite electrode

A technology of ethylenedioxythiophene and polystyrene sulfonic acid, which is applied in the direction of electrochemical variables of materials, can solve the problems such as the decrease of conductivity of PEDOT:PSS film, and achieves low preparation cost, good water stability and excellent stability. Effect

Inactive Publication Date: 2014-01-22
JIANGXI SCI & TECH NORMAL UNIV
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Problems solved by technology

However, this solution can only ensure that the PEDOT:PSS composite film does not fall off in ...

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  • Preparation methods of high-water-stability conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) composite electrode
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  • Preparation methods of high-water-stability conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) composite electrode

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Embodiment 1

[0015] Preparation method of highly water-stable conductive poly(3,4-ethylenedioxythiophene):polystyrenesulfonic acid (PEDOT:PSS) composite electrode:

[0016] 1. Preparation of PEDOT:PSS-PVA composite electrode: Mix and stir 1.3% PEDOT:PSS aqueous dispersion and 2% PVA solution at a volume ratio of 9:1 for 24 hours to obtain PEDOT:PSS-PVA Mixed solution; the obtained PEDOT:PSS-PVA mixed solution is drop-coated on the surface of the polished glassy carbon electrode, and dried at a constant temperature of 50° C. to obtain a PEDOT:PSS-PVA composite electrode.

[0017] 2. Preparation and application of PEDOT:PSS-PVA-MWCNTs composite electrode: According to the ratio of PEDOT:PSS to MWCNTs volume ratio of 1:2, add 4.0% mass fraction of MWCNTs dispersion to the PEDOT:PSS-PVA mixture , and stirred for 24 hours, 5 μL of the obtained mixture was drop-coated on the surface of the pretreated glassy carbon electrode, and dried at a constant temperature of 50 ° C to obtain a PEDOT:PSS-PVA...

Embodiment 2

[0021]A method for preparing a highly water-stable conductive PEDOT:PSS composite electrode, first preparing P(EDOT:EDOT-AA):PSS dispersion, by grafting hydrophobic functional groups AA on EDOT, EDOT and EDOT- AA copolymerization, the mass ratio of the two is 5:1, the obtained copolymer is dispersed in the PSSNa solution to obtain the P(EDOT:EDOT-AA):PSS dispersion liquid, and the obtained mixed solution is taken 5 μL and drip-coated on the The surface of the pretreated glassy carbon electrode was dried at a constant temperature of 50°C to obtain a P(EDOT:EDOT-AA):PSS composite electrode. Use this electrode for the detection of biomolecules and contaminants. P(EDOT:EDOT-AA):PSS composite electrode is used for the detection of biomolecules: ①Place the P(EDOT:EDOT-AA):PSS modified electrode in PBS solution containing a certain concentration of epinephrine, and use linear scanning Voltammetric (LSV) detection of epinephrine. Linear range of epinephrine: 0.2-15 μM and 20-100 μM ...

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Abstract

The invention provides two preparation methods of a high-water-stability conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite electrode. One preparation method comprises the steps of adding PEDOT:PSS into a polyvinyl alcohol solution, directly drippingly coating the mixed solution on the electrode surface, or adding multi-wall carbon nanotubes, carboxyl functionalized graphene and cytochrome c into the mixed solution for further modification to obtain the PEDOT:PSS composite electrode having excellent properties; and the other preparation method comprises the steps of grafting acrylic acid on EDOT, carrying out copolymerization of EDOT and EDOT-AA, dispersing the obtained copolymer into a sodium polystyrenesulfonate solution, and directly drippingly coating the P(EDOT:EDOT-AA):PSS dispersion liquid onto the electrode surface. The preparation methods solve the problems that the PEDOT:PSS composite electrode is quite easily expanded, absorbs moisture and is degraded in a water solution; and the prepared composite electrode has the advantages of excellent water stability, low preparation cost, simple process and the like.

Description

technical field [0001] The invention belongs to the field of organic composite materials, and in particular relates to a series of preparation methods of high-water-stable conductive poly(3,4-ethylenedioxythiophene): polystyrene sulfonic acid (PEDOT:PSS) composite electrodes. Background technique [0002] Poly(3,4-ethylenedioxythiophene):polystyrenesulfonic acid (PEDOT:PSS) is the most successful conductive polymer commercially available today. PEDOT:PSS due to its low cost, high electrical conductivity, low intrinsic thermal conductivity, high transparency, excellent stability under neutral conditions, good biocompatibility, unique processability, good film-forming properties, Excellent mechanical flexibility and other advantages, it is a very promising alternative new electrode material. This material is superior to noble metal electrodes, carbon electrodes, and ITO electrodes in terms of cost-effectiveness and toxicity impact. [0003] However, PEDOT:PSS films cast from...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 徐景坤文阳平王子飞姚媛媛张龙祝丹华
Owner JIANGXI SCI & TECH NORMAL UNIV
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