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Conductive air-ventilating and liquid-blocking film and preparation and application thereof

A technology of liquid-resistant and conductive materials, applied in electrical components, circuits, fuel cells, etc., can solve problems such as restricting applications, unfavorable uniform distribution of PTFE and carbon powder, affecting membrane mechanics, electrical conductivity, and air permeability and liquid resistance. content, the effect of excellent mechanical properties

Inactive Publication Date: 2017-06-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although ethanol utilizes the dispersion of carbon powder in the solvent, because most high molecular polymers such as polytetrafluoroethylene are easy to fibrillate in ethanol, and then coagulate, so ethanol is not conducive to PTFE and carbon powder in the microscopic scale ( The uniform distribution on the nano-micron size) seriously affects the mechanical, conductive and gas-permeable liquid-resistant properties of the film, which limits its further application

Method used

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  • Conductive air-ventilating and liquid-blocking film and preparation and application thereof
  • Conductive air-ventilating and liquid-blocking film and preparation and application thereof
  • Conductive air-ventilating and liquid-blocking film and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034]A conductive air-permeable liquid-resistance film, the composition of which comprises: PTFE with a mass fraction of 60% and acetylene black with a mass fraction of 40%.

[0035] Weigh 12g of acetylene black powder into a 2L three-neck glass flask, then add the PTFE solution diluted 100 times by mass, and add an equal volume of deionized water at the same time, maintain the system temperature at 80°C, mechanically stir and disperse for 2 hours, and keep stirring The speed is not lower than 800rpm. After the stirring and mixing are completed, the water is removed by centrifugation, and then the obtained solid dough is further dried in an air oven until the water content is not more than 1%. Grind the dried solid into a fine powder, add equal mass of ethanol and knead for 60 times, then place it on the roller machine, set the distance between the rollers to 3mm, maintain the temperature of the roller film at 25°C, and roll it 10 times into a blank; turn down the roller spa...

Embodiment 2

[0040] The difference between this embodiment and Embodiment 1 is that the composition of the conductive air-permeable liquid-resistant film of this embodiment includes: PTFE with a mass fraction of 33% and acetylene black with a mass fraction of 67%. Figure 5 It is the SEM image of the film after heat treatment.

Embodiment 3

[0042] The difference between this embodiment and Embodiment 1 is that the composition of the conductive air-permeable liquid-resistant film of this embodiment includes: PTFE with a mass fraction of 15% and acetylene black with a mass fraction of 85%.

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Abstract

The invention relates to a conductive air-ventilating and liquid-blocking film. The conductive air-ventilating and liquid-blocking film consists of a hydrophobic macromolecular polymer and conductive material powder, wherein the hydrophobic macromolecular polymer and the conductive material powder are uniformly distributed on nanoscale in the formed conductive air-ventilating and liquid-blocking film; the mass content of the conducive material powder is 50 to 85%; the conductive air-ventilating and liquid-blocking film is prepared by a rolling method. The conductive air-ventilating and liquid-blocking film has the advantages that the conductive property, mechanical property, air ventilating property and waterproof property are excellent, and the strong alkaline and strong acid corrosion is resisted; the weight is light, the service life is long, a preparation technology is simple and convenient, the cost is low, the scale production is easy, and the like; the conductive air-ventilating and liquid-blocking film can be applied to the fields of fuel batteries, electrochemical sensors and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material processing and manufacturing, and in particular relates to a hydrophobic polymer-conductive material powder composite conductive air-permeable liquid resistance film; the invention also relates to the preparation and application of the above material. Background technique [0002] The conductive air-permeable liquid-resistant film is a new type of polymer composite material. From the perspective of production process, the technical requirements of conductive air-permeable liquid-resistant film are much higher than that of general waterproof and breathable materials; from the perspective of use function, conductive air-permeable liquid-resistant film has multiple functions such as conduction, breathability, and liquid resistance at the same time, and has a wider range of applications. Application fields, such as metal-air electrodes, fuel cells, electrochemical sensors, electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1048H01M8/1069H01M8/1081
CPCH01M8/102H01M8/1081Y02E60/50Y02P70/50
Inventor 孙公权李焕巧王素力闫树华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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