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Preparation method of expanded graphite modified polytetrafluoroethylene/polyaniline conductive plastic

A technology of polytetrafluoroethylene and expanded graphite, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, adsorption water/sewage treatment, etc., can solve the problems of less research on cathode action, low hydrogen evolution overpotential, low current efficiency, etc. problems, to achieve the effect of reducing the real current density, large specific surface area, and improving current efficiency

Inactive Publication Date: 2015-09-09
高润宝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, using the combined action of cathode and anode to produce non-polluting and highly electrocatalytically active H 2 o 2 In the process of degrading pollutants in water, great breakthroughs have been made in the development of anode materials with high electrocatalytic activity, mainly electroactive DSA electrodes, and have begun to be used in the treatment of refractory biodegradable wastewater, while the opposite cathode is used in the degradation of organic pollutants. There are few studies on the effect of
Most of the cathode materials that have received attention are graphite, mesh porous carbon electrodes, carbon / polytetrafluoroethylene oxygenated electrodes, and mercury electrodes, etc., but most of the cathode materials used have high hydrogen evolution overpotential, which makes the current efficiency during the degradation process Low energy consumption and high energy consumption, so the development of cathode materials with higher performance such as lower hydrogen evolution overpotential, good conductivity and stability, corrosion resistance, and high mechanical strength is the main direction of this research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare raw materials according to the following weight ratio: 100 parts of polytetrafluoroethylene; 4 parts of flake graphite; 40 parts of polyaniline; 1 part of nano silver; 2 parts of surfactant; 20 parts of dimethylformamide; 0.5 part of potassium permanganate ; 24 parts of concentrated sulfuric acid; 80 parts of 1mol / L sulfuric acid solution.

[0022] Add potassium permanganate and flake graphite into the concentrated sulfuric acid solution, stir in a water bath at 50°C for 2 hours, filter, wash with deionized water several times, dry in an oven at 80°C, and use 800W microwave for 20s to obtain expanded graphite;

[0023] Add expanded graphite and nano-silver to dimethylformamide in a water bath at 60°C and stir evenly, then add to polytetrafluoroethylene emulsion several times, and stir at constant temperature for 2 hours;

[0024] Add polyaniline to 1mol / L sulfuric acid solution, stir at 40°C for 20 minutes, add surfactant and continue stirring fo...

Embodiment 2

[0027] Raw materials are prepared according to the following weight ratio: 100 parts of polytetrafluoroethylene emulsion; 3 parts of flake graphite; 35 parts of polyaniline; 2 parts of nano silver; 2 parts of surfactant; 15 parts of benzoic acid; 18 parts of sulfuric acid; 70 parts of 1mol / L sulfuric acid solution.

[0028] Add expanded graphite and nano-silver to benzoic acid in a water bath at 60°C and stir evenly, then add to polytetrafluoroethylene emulsion several times, and stir at constant temperature for 2 hours;

[0029] Add polyaniline to 1mol / L sulfuric acid solution, stir at 40°C for 20 minutes, add surfactant and continue stirring for 30 minutes, then add polytetrafluoroethylene emulsion and stir for 2 hours, after ultrasonic treatment for 30 minutes, vacuum dry at 90°C for 24 hours to obtain conductive plastic .

[0030] The prepared conductive plastic comprises the following components and their proportions by weight: 100 parts of polytetrafluor...

Embodiment 3

[0032] Prepare raw materials according to the following weight ratio: 100 parts of polytetrafluoroethylene emulsion; 2 parts of flake graphite; 30 parts of polyaniline; 5 parts of nano silver; 1 part of surfactant; 10 parts of dimethyl sulfoxide; 6 parts of concentrated sulfuric acid; 60 parts of 1mol / L sulfuric acid solution.

[0033] Add expanded graphite and nano-silver to dimethyl sulfoxide in a water bath at 60°C and stir evenly, then add to polytetrafluoroethylene emulsion several times, and stir at constant temperature for 2 hours;

[0034] Add polyaniline to 1mol / L sulfuric acid solution, stir at 40°C for 20 minutes, add surfactant and continue stirring for 30 minutes, then add polytetrafluoroethylene emulsion and stir for 2 hours, after ultrasonic treatment for 30 minutes, vacuum dry at 90°C for 24 hours to obtain conductive plastic .

[0035] The prepared conductive plastic comprises the following components and their proportions by weight: 100 parts...

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Abstract

The invention discloses a preparing method of polytetrafluoroethylene / polyaniline electroconductive plastic modified by expanded graphite. Polytetrafluoroethylene is compound with polyaniline, and at the same time, the expanded graphite and nano-silver are added for modification. The prepared material is good in electric-conducting property and heat-conducting property, good in anti-corrosion property, easy to process and form, low in cost, and easy to obtain, and can be used as cathode material to absorb pollutants in water.

Description

technical field [0001] The invention relates to a preparation method of conductive plastic, in particular to a preparation method of polytetrafluoroethylene / polyaniline conductive plastic modified by expanded graphite. Background technique [0002] Polyaniline has the advantages of good stability, high conductivity, special doping mechanism, and low preparation cost. It is one of the most promising conductive polymers. Melting and difficult processing limit the application to a large extent. Since polytetrafluoroethylene, polyvinyl alcohol, polysulfone, etc. are plastics with excellent comprehensive properties, they have excellent chemical stability and good mechanical properties. Combining polyaniline with them can improve the properties of polyaniline to a certain extent. machinability. [0003] Carbon is one of the most ubiquitous elements in nature, and the bonding methods and structures of carbon compounds are also extremely rich. Expanded graphite is one of the new n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L79/02C08K9/02C08K9/00C08K3/04C08K3/08H01B1/24C02F1/28
Inventor 高润宝
Owner 高润宝
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